<h3><strong>Original Prusa MK4</strong></h3>
<p>Assembled printers and printer kits are <strong>IN STOCK!</strong> </p>
<h3><strong>Original Prusa XL</strong></h3>
<p>Lead time for all printer variants is now 7-8 weeks.</p>
<p>The XL was switched from a preorder product to a regular product on March 1st, 2024. We no longer add pre-order gifts to orders placed after this date.</p>
<p>All preorders created before March 1st, 2024, are ready to be completed. Just sign in to your account, select the shipping method, and complete the payment. You can also change the variant of XL and/or add more products to the order. Your printer will be placed in the shipping queue based on the payment date. However, you will still get the two extra pre-order gifts as compensation for the delay: an extra print sheet and the Nextruder adapter for third-party nozzles. </p>
<h3><strong>Original Prusa MMU3</strong></h3>
<h4>MMU3 for the MK4 shipping table</h4>
<p>Last updated: April 9th, 2024 </p>
<table class="table" style="border-collapse: collapse; height: 213.188px; border-style: ridge; width: 96.201%;" border="1">
<tbody>
<tr style="height: 24.0625px;">
<td style="width: 47.577%; height: 24.0625px; border-style: dotted; border-width: 1px;"><strong>Order date</strong></td>
<td style="width: 52.423%; height: 24.0625px; border-style: dotted; border-width: 1px;"><strong>Shipping estimate</strong></td>
</tr>
<tr style="height: 21.0625px;">
<td style="width: 47.577%; height: 21.0625px; border-style: dotted; border-width: 1px;">July 27. 2023</td>
<td style="width: 52.423%; height: 21.0625px; border-style: dotted; border-width: 1px;">Currently shipping</td>
</tr>
<tr style="height: 21px;">
<td style="width: 47.577%; height: 21px; border-style: dotted; border-width: 1px;">Rest of week 30, 2023</td>
<td style="width: 52.423%; height: 21px; border-style: dotted; border-width: 1px;">From week 15 (starts April 8th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 47.577%; height: 21px; border-style: dotted; border-width: 1px;">Week 31 - 34, 2023</td>
<td style="width: 52.423%; height: 21px; border-style: dotted; border-width: 1px;">From week 16 (starts April 15th)</td>
</tr>
<tr style="height: 21.0625px;">
<td style="width: 47.577%; height: 21.0625px; border-style: dotted; border-width: 1px;">Week 35 - 39, 2023</td>
<td style="width: 52.423%; height: 21.0625px; border-style: dotted; border-width: 1px;">From week 17 (starts April 22nd)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 47.577%; height: 21px; border-style: dotted; border-width: 1px;">Week 40 - 44, 2023</td>
<td style="width: 52.423%; height: 21px; border-style: dotted; border-width: 1px;">From week 18 (starts April 29th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 47.577%; height: 21px; border-style: dotted; border-width: 1px;">Week 45 - 50, 2023</td>
<td style="width: 52.423%; height: 21px; border-style: dotted; border-width: 1px;">From week 19 (starts May 6th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 47.577%; height: 21px; border-style: dotted; border-width: 1px;"><strong>Week 51, 2023 - week 6, 2024</strong></td>
<td style="width: 52.423%; height: 21px; border-style: dotted; border-width: 1px;">From week 20 (starts May 13th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 47.577%; height: 21px; border-style: dotted; border-width: 1px;">Week 7 - 11, 2024</td>
<td style="width: 52.423%; height: 21px; border-style: dotted; border-width: 1px;">From week 21 (starts May 20th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 47.577%; height: 21px; border-style: dotted; border-width: 1px;">Week 12 - 15, 2024</td>
<td style="width: 52.423%; height: 21px; border-style: dotted; border-width: 1px;">From week 22 (starts May 27th)</td>
</tr>
</tbody>
</table>
<h4>MMU2-&gt;MMU3 upgrade kit shipping table table</h4>
<p>Last updated: April 9th, 2024 </p>
<table class="table" style="border-collapse: collapse; height: 188.297px; border-style: ridge; width: 96.5686%;" border="1">
<tbody>
<tr style="height: 21px;">
<td style="height: 21px; border-style: dotted; border-width: 1px; width: 46.135%;"><strong>Order date</strong></td>
<td style="width: 53.865%; height: 21px; border-style: dotted; border-width: 1px;"><strong>Shipping estimate</strong></td>
</tr>
<tr style="height: 22.1719px;">
<td style="width: 46.135%; height: 22.1719px; border-style: dotted; border-width: 1px;">September 1. 2023</td>
<td style="width: 53.865%; height: 22.1719px; border-style: dotted; border-width: 1px;">From week 16 (starts April 15th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 46.135%; height: 21px; border-style: dotted; border-width: 1px;">September 2. - 3. 2023</td>
<td style="width: 53.865%; height: 21px; border-style: dotted; border-width: 1px;">From week 19 (starts May 6th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 46.135%; height: 21px; border-style: dotted; border-width: 1px;">Week 36 - 38, 2023</td>
<td style="height: 21px; width: 53.865%; border-style: dotted; border-width: 1px;">From week 20 (starts May 13th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 46.135%; height: 21px; border-style: dotted; border-width: 1px;">Week 39 - 43, 2023</td>
<td style="height: 21px; width: 53.865%; border-style: dotted; border-width: 1px;">From week 21 (starts May 20th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 46.135%; height: 21px; border-style: dotted; border-width: 1px;">Week 44 - 51, 2023</td>
<td style="height: 21px; width: 53.865%; border-style: dotted; border-width: 1px;">From week 22 (starts May 27th)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 46.135%; height: 21px; border-style: dotted; border-width: 1px;"><strong>Week 52, 2023 - week 8, 2024</strong></td>
<td style="width: 53.865%; height: 21px; border-style: dotted; border-width: 1px;">From week 23 (starts June 3rd)</td>
</tr>
<tr style="height: 21px;">
<td style="width: 46.135%; height: 21px; border-style: dotted; border-width: 1px;">Week 9 - 13, 2024</td>
<td style="width: 53.865%; height: 21px; border-style: dotted; border-width: 1px;">From week 24 (starts June 10th)</td>
</tr>
<tr style="height: 19.125px;">
<td style="width: 46.135%; height: 19.125px; border-style: dotted; border-width: 1px;">Week 14 - 15, 2024</td>
<td style="width: 53.865%; height: 19.125px; border-style: dotted; border-width: 1px;">From week 25 (starts June 17th)</td>
</tr>
</tbody>
</table>
<h2>Current lead time estimates for new orders</h2>
<p><span style="color: #e67e23;"><strong>Updated: April 16th, 2024 </strong></span></p>
<p><em>The dates are only an estimation at the date of update, specified above, and rely on the actual</em> production. <em>We're doing our best but please be aware that it can shift for the lead time products. We will update here and on the product pages accordingly.</em></p>
<p>The lead time estimate applies to standalone products, other products in the order may increase the lead time.</p>
<p></p>
<table class="table" style="border-collapse: collapse; height: 921.875px; border-style: ridge; width: 100%;" border="1">
<tbody>
<tr style="height: 60.875px;">
<td style="height: 60.875px; width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<h4>Product</h4>
</td>
<td style="height: 60.875px; width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<h4>Lead time</h4>
</td>
</tr>
<tr style="height: 72px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>Original Prusa MK4<br /></strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr style="height: 72px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>Original Prusa MK4 kit<br /></strong><strong><br /></strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>Original Prusa XL</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>6 weeks</strong></p>
</td>
</tr>
<tr style="height: 72px;">
<td style="height: 72px; width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>Original Prusa i3 MK3S+<br /></strong><strong><br /></strong></p>
</td>
<td style="height: 72px; width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr style="height: 72px;">
<td style="height: 72px; width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>Original Prusa i3 MK3/S to MK3S+ upgrade<br /></strong>Original Prusa MINI to MINI+ upgrade kit<strong><br /></strong></p>
</td>
<td style="height: 72px; width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr style="height: 87px;">
<td style="height: 87px; width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>SL1S SPEED/ CW1S bundle<br /></strong></p>
<p>CW1S - (standalone)</p>
</td>
<td style="height: 87px; width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>1 week</strong></p>
<p>In stock</p>
</td>
</tr>
<tr style="height: 84px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 84px;">
<p><strong>Original Prusa SL1 to SL1S upgrade kit</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 84px;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr style="height: 58px;">
<td style="height: 58px; width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>Original Prusa MINI+ (pre-assembled parts)</strong></p>
</td>
<td style="height: 58px; width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr style="height: 68px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 68px;">
<p><strong>Original Prusa MINI+ kit</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 68px;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr style="height: 87px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 87px;">
<p><strong>Original Prusa Enclosure<br /></strong><em>(standalone)</em></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 87px;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>Enclosure add-ons</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>1 week</strong></p>
</td>
</tr>
<tr style="height: 51px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>MMU3 Multi Material Upgrade kit<br /></strong>(for MK3S+)</p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>MMU3 Multi Material Upgrade kit<br /></strong>(for MK4)</p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>6-7 weeks</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>MMU2-&gt;MMU3 upgrade kits for </strong><strong>MK3S+</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>MMU2-&gt;MMU3 upgrade kits for MK4</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>9-10 weeks</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>MK3.5 upgrade</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>MK3.9 upgrade</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>In stock</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>MK4 upgrade</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>In stock</strong></p>
</td>
</tr>
</tbody>
</table>
<p>You can find your order shipping date in the order detail section in our shop.</p>
<div class="note-callout">All products purchased in our <a href="https://shop.prusa3d.com/">online store</a> are currently being shipped from the<strong> Czech Republic, </strong>a member state of the <strong>European Union, customs charges may apply for shipments to countries outside of the EU!</strong> Please see our advisory article <a href="http://help.prusa3d.com/article/vat-value-added-tax-customs-fees_1505#orders-outside-eu">here</a>.</div>

Shipping information

<div>
<h3 dir="ltr">Stable releases</h3>
<p dir="ltr">The latest <strong>stable release</strong> of PrusaSlicer can be always found in the <a href="https://www.prusa3d.com/drivers/">DRIVERS &amp; APPS package</a> and it’s available for Windows, Mac OS X, and Linux. The package also includes test objects and printer drivers, but you can choose to install only PrusaSlicer.</p>
<p dir="ltr">You can also download a standalone installer for your computer at <a href="https://www.prusa3d.com/page/prusaslicer_424/">PrusaSlicer introduction &amp; download</a> or at <a href="https://github.com/prusa3d/PrusaSlicer/releases">our GitHub</a>.</p>
<p dir="ltr">Stable releases are versions that have been tested as thoroughly as possible and have gone through numerous public alpha- and beta-versions.</p>
<h3 dir="ltr">Alpha and Beta releases</h3>
<p dir="ltr">Do you want to keep up with PrusaSlicer’s fast development pace? Development builds have the latest features and bug fixes. However, they can be unstable, crash, or behave unexpectedly. We do not recommend using development builds in production environments. Check out <a href="https://github.com/prusa3d/PrusaSlicer/releases">our GitHub</a> for downloads and more info.</p>
<div class="tip-callout">For how to install PrusaSlicer on most computers, see our article <a href="http://help.prusa3d.com/article/install-prusaslicer_1903">Install PrusaSlicer</a>.</div>
</div>


Download PrusaSlicer

Layers and perimeters

<p dir="ltr">3D printers work by laying layer over layer of plastic to create a 3D object. Each new layer must be supported by the one beneath it. If part of your model starts in mid-air and is not supported by anything below, you need to add an additional support structure to ensure a successful print.</p>
<div class="tip-callout">It is worth considering altering the orientation of the model or splitting the model into multiple parts in order to possibly reduce overhangs and consequently the amount of supports generated.</div>
<p dir="ltr">PrusaSlicer can both detect areas that need supports and generate them in these places <strong>automatically</strong>.</p>
<p dir="ltr">You can also set supports manually using:</p>
<ul>
<li dir="ltr"><a href="http://help.prusa3d.com/article/paint-on-supports_168584">Paint on supports</a></li>
<li dir="ltr"><a href="http://help.prusa3d.com/article/modifier-meshes-custom-supports-and-other-magic_114258#custom-supports">Support enforcers and blockers</a></li>
</ul>
<p dir="ltr">Supports can be turned on from the <strong>right panel</strong> or in the <strong>Print settings - Support material - Generate support material</strong>.</p>
<p dir="ltr">There are 3 different Support styles in PrusaSlicer</p>
<ul>
<li dir="ltr">Grid</li>
<li dir="ltr">Snug</li>
<li dir="ltr"><a href="http://help.prusa3d.com/article/organic-supports_480131">Organic</a></li>
</ul>
<p dir="ltr">When the print finishes, depending on the model geometry and material used, the support structure is often easily removable with bare hands. You can use pliers to get a better grip in otherwise hard-to-reach places. A scalpel or a utility knife can also be used to cleanly remove a piece of support that seems to be stuck to the model.</p>
<div class="warning-callout">Pieces of supports can be surprisingly sharp and are sometimes violently ejected in a random direction after removal. When you encounter hard-to-remove supports, <strong>consider wearing protective glasses</strong> (this sounds stupid until you get hit in the eye for the first time).</div>
<h3 dir="ltr">Supports everywhere</h3>
<p dir="ltr">Supports can grow from both the print bed and any model surface when necessary. </p>
<p dir="ltr">This ensures that every overhang and part starting mid-air will get supported. However, small imperfections may appear on the surface where supports started growing from.</p>
<h3 dir="ltr">Supports from build plate only</h3>
<p>Creates only supports that have their base at the print bed.</p>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/everywhere_build_plate_only.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/everywhere_build_plate_only-300x171.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/everywhere_build_plate_only-600x343.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/everywhere_build_plate_only-768x439.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/everywhere_build_plate_only-800x457.jpg 800w" alt="" /></p>
<p style="text-align: center;"><em>Supports from build plate only (left), supports everywhere (right)</em></p>
<h3 dir="ltr">For support enforcers only</h3>
<p dir="ltr">Automatic support generation is enabled only for areas marked with a support enforcer. This option is essentially a shortcut that turns <strong>Print settings - Support material - Generate support material</strong> on, but <strong>Print settings - Support material - Auto-generated supports</strong> off.</p>
<h3 dir="ltr">Supports on/off for individual models</h3>
<p dir="ltr">It’s possible to print multiple objects at once each with its own support settings. By default, all models are affected by the global settings. You can overwrite them by <strong>right-clicking</strong> on a model in the 3D view and selecting <strong>Support material</strong>. Alternatively, you can right-click on the editing icon in the Object list.</p>
<p dir="ltr">A new window will appear in the right panel called <strong>Object settings to modify - Support material</strong>. Changing these settings will affect only the relevant object and its instances. You can remove the settings overwrite by clicking on the red cross icon. When you do so, the global settings will once again be applied.</p>
<p dir="ltr"><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/supports_per_object-2.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/supports_per_object-2-300x149.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/supports_per_object-2-600x299.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/supports_per_object-2-768x383.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/supports_per_object-2-800x399.png 800w" alt="" width="495" height="247" loading="lazy" /></p>
<h3 dir="ltr">Support enforcer/blocker</h3>
<p dir="ltr">The automatic supports can sometimes appear in hard-to-reach places, resulting in a tedious removal of support structures. If you think such a part of the model could be printed without supports, but neither the <strong>Overhang threshold</strong> setting nor selecting <strong>Supports on built plate only</strong> helped, you can adjust supports manually.</p>
<div class="tip-callout">Starting with PrusaSlicer 2.3, you can also use <a href="http://help.prusa3d.com/article/paint-on-supports_168584">Paint on supports</a>.</div>
<p dir="ltr"><strong>Right-click</strong> on a model and choose either a <strong>Support blocker or Support enforcer</strong>.</p>
<p dir="ltr"><span style="color: #2dc26b;"><strong>Simple mode</strong></span> - Enforcers/blockers are always box-shaped</p>
<p dir="ltr"><span style="color: #f1c40f;"><strong>Advanced mode</strong></span> - Box/Cylinder/Sphere/Slab shapes</p>
<p dir="ltr"><span style="color: #ba372a;"><strong>Expert mode</strong></span> - Option to load external geometry as a blocker/enforcer</p>
<p dir="ltr">Support blockers and enforcers can be manipulated with the familiar Move, Rotate, and Scale tools. You can also quickly duplicate them with copy&amp;paste.</p>
<h3 dir="ltr">Support blocker</h3>
<p dir="ltr">Support blockers are useful when you’re generally happy with the automatic supports and you simply want to remove some of them. Focus on placing blockers where the supports meet the object, the rest of the support structure below will be removed automatically.</p>
<h3 dir="ltr">Support enforcers</h3>
<p dir="ltr">Support enforcers are great in situations, where only a few parts of the object need to be supported, but the automatic algorithm places supports all over the model. In this situation, don’t forget to switch the support mode to For support enforcers only. </p>
<p dir="ltr">It’s less common, but you can also use support enforcers with the automatic generation on.</p>
<p dir="ltr">Another interesting use of support enforcers is to split long bridges into smaller ones by placing a support in the middle of the bridge. You can repeat this process and print shorter, near-perfect bridges while still making the supports easy to remove.</p>
<div class="note-callout">Some options will only appear when <a href="http://help.prusa3d.com/article/simple-advanced-expert-modes_1765">Expert mode</a> is selected.</div>
<h3 dir="ltr"><strong>Generate support material</strong></h3>
<p dir="ltr">Supports are disabled unless a model has an overwrite for this setting</p>
<h3 dir="ltr"><strong>Auto-generated supports</strong></h3>
<p dir="ltr">When off, the overhang detection is off. Only support enforcers generate supports.</p>
<h3 dir="ltr"><strong>Overhang threshold</strong></h3>
<p dir="ltr">The Overhang threshold value represents the most horizontal slope (measured from the horizontal plane) that you can print without support material (90=vertical).</p>
<p dir="ltr">Changing this value is a quick way to adjust the amount of generated supports.</p>
<p dir="ltr">The lower the value, the less support will be generated.</p>
<p dir="ltr"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/support_overhang_threshold.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/support_overhang_threshold-300x171.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/support_overhang_threshold-600x342.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/support_overhang_threshold-768x437.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/support_overhang_threshold-800x455.png 800w" alt="" /></p>
<ol>
<li dir="ltr" role="presentation">The Overhang threshold value and how it's measured</li>
<li dir="ltr" role="presentation">Overhang threshold 55</li>
<li dir="ltr" role="presentation">Overhang threshold 35</li>
<li dir="ltr" role="presentation">Overhang threshold 15</li>
</ol>
<h3 dir="ltr"><strong>Enforce support for the first</strong></h3>
<p dir="ltr">Generate support material for the specified number of layers counting from the bottom, regardless of whether normal support material is enabled or not and regardless of any angle threshold. This is useful for getting more adhesion of objects having a very thin or poor footprint on the build plate.</p>
<p dir="ltr" style="text-align: center;"><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/enforce_for_layers.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/enforce_for_layers-300x204.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/enforce_for_layers-587x400.jpg 587w, https://cdn.help.prusa3d.com/wp-content/uploads/enforce_for_layers-768x523.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/enforce_for_layers-800x545.jpg 800w" alt="" /><em>Enforce support for the first 100 layers</em></p>
<h3 dir="ltr"><strong>Raft layers</strong></h3>
<p dir="ltr">The object will be raised by this number of layers and support material will be generated under it. When the print finishes, you can grab the raft and peel it away from the part.</p>
<h3 dir="ltr">Raft contact Z distance</h3>
<p>The vertical distance between the raft and the object. Ignored for soluble interfaces.</p>
<h3>Raft expansion</h3>
<p>Expansion of the raft in the XY plane for better stability.</p>
<h3>Style</h3>
<p>Style and shape of supports. The default <strong>Grid</strong> supports have a very well-defined minimum area, making them very stable. However, they tend to leak out of regions they support along the walls of the object. The <strong>Snug</strong> supports maintain the shape of the overhang, so they do not leak to the walls. The trade-off is the possibility of lower stability of tall and thin support pillars.</p>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid-600x190.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid-800x253.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid-300x95.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid-768x243.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid-1536x485.jpg 1536w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid-2048x647.jpg 2048w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/snug_vs_grid.jpg 1600w" alt="" width="1847" height="584" loading="lazy" /></p>
<p style="text-align: center;"><em>Grid supports (left), Snug supports (right)</em></p>
<p><a href="https://help.prusa3d.com/article/organic-supports_480131"><strong>Organic supports</strong></a> offer a completely different approach to supporting overhanging areas. Branches of support structures grow from the sides and automatically get denser beneath parts that need the support. The Organic supports are easily removable, do not scar the surface, and are fast and cheap to print.</p>
<figure class="image" style="text-align: center;"><img decoding="async" title="Support material" src="https://cdn.help.prusa3d.com/wp-content/uploads/2023/07/30cd916294dd7ac737ac7c09e1edfbb9.jpg" alt="" width="2011" height="1119" loading="lazy" /><figcaption>Grid supports (left), Organic supports (right)</figcaption></figure>
<h3 dir="ltr"><strong>Top contact Z distance</strong></h3>
<p dir="ltr">The vertical distance between the object and the support material interface.</p>
<p dir="ltr">Setting this to 0 will prevent PrusaSlicer from using bridge flow and speed for the first object layer.</p>
<p dir="ltr">Values between 50-75% of the layer height seem to work well.</p>
<p dir="ltr"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/contact_z_distance.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/contact_z_distance-300x191.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/contact_z_distance-600x381.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/contact_z_distance-768x488.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/contact_z_distance-800x508.jpg 800w" alt="" /></p>
<h3 dir="ltr">Bottom contact Z distance</h3>
<p>Similar to Top contact Z distance, but affecting the gap at the bottom of the support tower (when supports start on top of a model and not on the build plate).</p>
<h3 dir="ltr"><strong>Pattern</strong></h3>
<p dir="ltr">Rectilinear - default, usually the easiest to remove</p>
<p dir="ltr">Rectilinear grid - sturdier and less prone to breaking during printing compared to rectilinear infill, harder to remove</p>
<p dir="ltr">Honeycomb - sturdy, somewhat difficult to remove</p>
<h3 dir="ltr"><strong>With sheath around the support</strong></h3>
<p dir="ltr">Creates a single perimeter around the supports, which makes them sturdier, but more difficult to remove.</p>
<h3 dir="ltr"><strong>Pattern spacing</strong></h3>
<p dir="ltr">Spacing between support material lines. Increase to make support removal easier. Support interface layers bridge over support material lines, if you increase this value too much, these bridges will start to sag and have an imperfect connection with the model.</p>
<p dir="ltr">The pattern spacing also sets the internal resolution of PrusaSlicer's supports grid. If you're using Paint-on supports or Support enforcers and you're unable to force supports exactly where you want them to be, try lowering the pattern spacing to get more resolution.</p>
<h3 dir="ltr"><strong>Pattern angle</strong></h3>
<p dir="ltr">Rotates infill pattern angle on the horizontal plane.</p>
<h3 dir="ltr">Closing radius</h3>
<p>For Snug supports only. Gaps smaller than the closing radius will be filled in.</p>
<h3 dir="ltr"><strong>Top interface layers</strong></h3>
<p dir="ltr">Interface layers form a more uniform surface between the object and the support material. These are preferably set to a much denser pattern than the non-interface layers so that you can both maximize the surface area of the support in contact with the model to prevent sagging while minimizing print time and material used with a bigger non-interface pattern spacing.</p>
<h3 dir="ltr">Bottom interface layers</h3>
<p>Similar as Top interface layers, but affecting the number of interface layers at the bottom of the support tower (when supports start on top of a model and not on the build plate).</p>
<h3 dir="ltr"><strong>Interface pattern spacing</strong></h3>
<p dir="ltr">Spacing between interface lines. Set to 0 to get a solid interface.</p>
<h3 dir="ltr"><strong>Interface loops</strong></h3>
<p dir="ltr">When enabled, the top layer of supports is covered with loops - continuous polylines.</p>
<h3 dir="ltr"><strong>Support on build plate only</strong></h3>
<p dir="ltr">Supports can start only on the print bed. Enabling this option is a really quick way to get rid of excess supports mostly on organic shapes. Make sure to check the preview and verify that all parts are either supported or at an overhang angle manageable by the printer.</p>
<p dir="ltr"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/supports_build_plate_only.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/supports_build_plate_only-300x178.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/supports_build_plate_only-600x356.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/supports_build_plate_only-768x455.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/supports_build_plate_only-800x474.png 800w" alt="" /></p>
<p dir="ltr" style="text-align: center;"><em>Supports everywhere (left) vs Supports on build plate only (right)</em></p>
<h3 dir="ltr"><strong>XY separation between an object and its support</strong></h3>
<p dir="ltr">Sets the width of a gap between the model and supports. Bigger XY separation decreases the contact area of supports but makes them easier to remove and less prone to fusing to the model.</p>
<p dir="ltr">If expressed as a percentage (for example 150%) it will be calculated over the external perimeter width.</p>
<p dir="ltr"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/XY_seperation-1.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/XY_seperation-1-300x151.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/XY_seperation-1-600x301.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/XY_seperation-1-768x386.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/XY_seperation-1-800x402.jpg 800w" alt="" /></p>
<h3 dir="ltr"><strong>Don’t support bridges</strong></h3>
<p dir="ltr">Prevents support material from being generated under bridged areas.</p>
<h3 dir="ltr"><strong>Synchronize with object layers</strong></h3>
<p dir="ltr">Supports will be printed at equal layer heights as the model itself. This is useful with multi-material printers, where the extruder switch is expensive.</p>
<p>Synchronize with object layers can only be enabled with soluble supports (contact Z distance 0). </p>
<p>Not synchronizing with object layers allows the support layers to grow faster than the object layers (if not excessively slowed down by the cooling logic) and independent layer height also allows PrusaSlicer to follow the gap between the object and the support top surface precisely. We may consider this to be configurable even for non-soluble supports in the future.</p>
<p> </p>


Support material

<p dir="ltr">The main purpose of infill is to provide internal support for top layers, which would otherwise have to bridge over empty space. Infill also affects the speed of printing, structural strength, filament consumption, and even the look of the printed object.</p>
<div class="note-callout">Some options will only appear when <a href="http://help.prusa3d.com/article/simple-advanced-expert-modes_1765">Expert mode</a> is selected.</div>
<h3>Fill density</h3>
<p>Most models can be printed with 10-15% infill. If the top of the model closes gradually, it can be printed hollow (0% infill), though we generally do not recommend it. If you need the model to be heavier, want more compression resistance or higher stiffness, you can increase the infill. You'll rarely need infill higher than 30%. Finally, you can print the model with 100% infill and the infill pattern will be forced to rectilinear. Keep in mind that 100% infill can have a negative impact on the look of the printed object.</p>
<div class="tip-callout"><strong>Increasing model strength</strong><br />The strength of a model is mostly defined by the number of <strong>perimeters (not infill</strong>). If you want to have a stronger print, increase the number of perimeters. That said, infill does help with compression resistance.</div>
<h3>Fill pattern</h3>
<p>PrusaSlicer offers many infill patterns to choose from - check the dedicated <a href="http://help.prusa3d.com/article/infill-patterns_177130"><strong>Infill pattern documentation page</a></strong>.</p>
<h3>Length of the infill anchor</h3>
<p>The infill is usually <strong>connected to the perimeters</strong> with a so-called anchor, which is a <strong>short line</strong> of another (inner) perimeter that turns into an infill line. This makes the infill sturdier and is required by some materials (namely PETG) to stabilize the extrusion flow at the start of an infill line.</p>
<p>The length of the infill anchor value sets how many millimeters of this anchor will connect the infill and the perimeters. If you set this value to 0, the infill will be printed independently on the perimeters. Set a higher value to print the anchor that will continue as the infill itself.</p>
<p>If expressed as a percentage (15%) it will be calculated over the infill extrusion width.</p>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/01/7a35a3b708029b4e_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/01/7a35a3b708029b4e_painted-600x334.jpeg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/01/7a35a3b708029b4e_painted-800x445.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/01/7a35a3b708029b4e_painted-300x167.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/01/7a35a3b708029b4e_painted-768x427.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/01/7a35a3b708029b4e_painted-1536x854.jpeg 1536w" alt="" /></p>
<h3>Maximum length of the infill anchor</h3>
<p>This value sets the maximum length of the infill anchor connecting the infill with perimeters.</p>
<p>Set this parameter to 0 to disable anchoring completely.</p>
<h3>Top fill pattern</h3>
<p>You can pick a custom infill pattern that only affects the top visible layer, not adjacent solid layers below. </p>
<h3>Bottom fill pattern</h3>
<p>You can pick a custom infill pattern that only affects the bottom visible layer, not adjacent solid layers above.</p>
<h3>Combine infill every X layers</h3>
<p>Different layer heights will be used for infill and for perimeters in order to speed up the print without sacrificing the print quality.<br />Example: Combine infill every 3 layers, layer height 0.1 mm, infill will be printed at 0.3 mm layer height.</p>
<div class="note-callout">The maximum layer height is limited by your nozzle diameter. If you try to combine infill every 1+ layers with 0.4 mm nozzle and 0.3 mm layer height, no change will actually happen because you cannot print layers bigger than (about) 0.32mm (80% of nozzle diameter).</div>
<div><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/combine_every-01.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/combine_every-01-300x169.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/combine_every-01-600x337.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/combine_every-01-768x432.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/combine_every-01-800x450.png 800w" alt="" width="699" height="393" loading="lazy" /></div>
<div style="text-align: center;"><em>Infill (grey) printed at double the layer height of perimeters (orange)</em></div>
<p style="text-align: center;"> </p>
<h3>Solid Infill every X layers</h3>
<p>This feature allows you to force a solid layer after every given number of layers. This can be useful to increase the strength of the printed part, however other options, such as increasing the number of perimeters or infill percentage are preferred. Another application would be to create separate internal cells in order to increase thermal insulation.</p>
<p><strong>Set to 0 to disable.</strong></p>
<h3>Fill angle</h3>
<p>Default angle for infill orientation. Cross-hatching will be applied to some infill patterns.</p>
<div class="note-callout"><strong>Bridges</strong> will be printed using the best direction PrusaSlicer can detect, so this setting does not affect them.</div>
<h3>Solid infill threshold area</h3>
<p>Force solid infill for regions having a smaller area than the specified threshold.</p>
<p><strong>Set to 0 to disable.</strong></p>
<p style="text-align: center;"><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/solid_infill_threshold.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/solid_infill_threshold-300x92.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/solid_infill_threshold-600x184.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/solid_infill_threshold-768x236.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/solid_infill_threshold-800x246.png 800w" alt="" /><em>Solid infill threshold 0 (left), 15 (middle), 100 (right)</em></p>


Infill

Original Prusa SL1 3D printer is based on the MSLA printing process. Unlike Original Prusa i3 machines, this printer uses a high-resolution LCD panel and a UV LED to cure thin layers of resin to achieve an unprecedented level of detail.

Original Prusa SL1 kit assembly

Assembly manuals

Basic calibration

What to do when the printer reports an error message during calibration.

Calibration Error Messages

All information you need to know to learn how to calibrate your 3D printer to achieve perfect prints.

Calibration

Printer description

Printer features

FAQs and other useful information you might be interested in before or after making your purchase at shop.prusa3d.com

General Information

Basic overview of your 3D printer and it's features, plus general Prusa Research info.

About your printer

3D models

Material guide

Slicing

Printer maintenance

Prusa Connect & PrusaLink

In this section, you can find material guides, printer troubleshooting and general info about using your printer.

Using the printer

Print Quality Troubleshooting

Printer troubleshooting

QR Error codes

Print Error Messages

Description of how to recognize and solve common problems, especially hardware and electronics related.

Troubleshooting

About PrusaSlicer

Configuration and profiles

User interface

Input/output

Left toolbar

Top toolbar

Print settings

Printer settings

Advanced features

SLA slicing

Other (PrusaSlicer)

The official documentation for the PrusaSlicer slicing software. From basic configuration to advanced settings like modifier meshes.

PrusaSlicer

1. Introduction

2. Base & Tower

3. Covers & Platform

4. Electronics & Lid

5. Preflight check

Manual changelog SL1

<p>This is an advanced system for displaying error screens providing more useful information to the user. In case of an issue, the printer will display the name of the error followed by a brief description and a QR code. Take your phone, scan the code, and get immediately redirected to an article that will in detail explain what happened to your printer and how to fix the problem.</p>
<table style="border-collapse: collapse; width: 100%; margin-left: auto; margin-right: auto; height: 386.925px;" border="0">
<tbody>
<tr style="height: 345.325px;">
<td style="width: 32.8125%; height: 345.325px;"><em>  <img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_qr_error_upscaled.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_qr_error_upscaled-300x400.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_qr_error_upscaled-450x600.jpg 450w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_qr_error_upscaled-225x300.jpg 225w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_qr_error_upscaled-768x1024.jpg 768w" alt="" width="241" height="320" loading="lazy" /></em></td>
<th style="width: 67.1875%; height: 345.325px;"><em><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-resin-sensor-qr-code.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-resin-sensor-qr-code-600x360.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-resin-sensor-qr-code-800x480.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-resin-sensor-qr-code-300x180.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-resin-sensor-qr-code-768x461.jpg 768w" alt="" width="550" height="330" loading="lazy" /></em></th>
</tr>
</tbody>
</table>
<p style="text-align: center;"><em>QR error screen for MINI on the left and for SL1 on the right.</em></p>
<p>Error codes are supported at the following printers:</p>
<ul>
<li>Original Prusa MINI &amp; MINI+ <em>(starting firmware 4.3.0)</em></li>
<li>Original Prusa SL1/SL1S <em>(starting firmware 1.5.0)</em></li>
<li>Original Prusa XL</li>
<li>Original Prusa MK4/MK3.9</li>
<li>Original Prusa MK3.5</li>
<li>Original Prusa MMU3</li>
</ul>
<div>
<h3>How to use the error code</h3>
<p>In case your printer displays the error screen, there are multiple ways to access the article:</p>
<ul>
<li>Scan the QR code from the printer screen using a phone or tablet</li>
<li>Use the link displayed on the screen (e.g. help.prusa3d.com/en/12201)</li>
<li>Open help.prusa3d.com and search for the error (e.g. 12201)</li>
</ul>
<p>Follow the article explaining what went wrong and how to fix the issue. Note that some errors might require you to replace broken part(s) of the printer. If a replacement is necessary, there will be a link to the service guide at the bottom of the article.</p>
<h3>Error code explained</h3>
<p>How is each code created? Let's use error #12201 again as an example. The code consists of five numbers with the following pattern: XXYZZ</p>
<table class="striped">
<tbody>
<tr style="height: 18.4px;">
<td style="width: 48.8442%; text-align: center; height: 18.4px;"><strong># XXYZZ</strong></td>
<td style="width: 48.8442%; text-align: center; height: 18.4px;"><strong><a href="http://help.prusa3d.com/article/preheat-error-bed-12201-mini_112444">Heating failed bed #12201 (MINI)</a></strong></td>
</tr>
<tr style="height: 119.2px;">
<td style="width: 48.8442%; height: 119.2px;">
<p>XX - ID number of the printer, according to USB PID</p>
<p>Y - Error category (common for all printers)</p>
<p>ZZ - ID number for the specific error</p>
</td>
<td style="width: 48.8442%; height: 119.2px;">
<p>12 - Printer number 12: Original Prusa MINI</p>
<p>2 - Error category: Temperature error</p>
<p>01 - Specific error code: Heatbed heating failed</p>
</td>
</tr>
</tbody>
</table>
</div>
<div> </div>
<div>
<div class="tip-callout">More information about the types of printers, categories, and a full list of the error codes can be found in the following <a href="https://github.com/prusa3d/Prusa-Error-Codes" target="_blank" rel="noopener noreferrer">GitHub repository</a>.</div>
<h3>URL format</h3>
<p>Example of the URL in the QR code: https://help.prusa3d.com/en/12201/OI6HB7H6/410</p>
<ul>
<li>en -&gt; a language of the landing page with the article</li>
<li>12201 -&gt; the unique error code sequence</li>
<li>OI6HB7H6 -&gt; device hash</li>
<li>410 -&gt; firmware version in your 3D printer</li>
</ul>
<div class="note-callout">Starting from February 2023, the error codes in firmware for all products will have the URL https://prusa.io/[error number]. However, the old URLs will still work.</div>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/image_2020-12-21_223119.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/image_2020-12-21_223119-600x337.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/image_2020-12-21_223119-800x449.png 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/image_2020-12-21_223119-300x168.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/image_2020-12-21_223119-768x431.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/image_2020-12-21_223119-1536x862.png 1536w" alt="" width="800" height="449" loading="lazy" /></p>
<p style="text-align: center;"><em>An example of the error page with the printer running outdated firmware</em></p>
<h3>Device hash</h3>
<p>The URL link embedded in the QR code may contain an optional “device hash”. This can be disabled in the MINI+ in <em>Settings</em>, and in the SL1 in <em>Settings -&gt; Settings </em>and Sensors, on the MK4 and XL printers in <em>Settings -&gt; System</em>. Including this information enables us to check whether you are running the latest version of firmware, and if not, we will inform you at the top of the article. The information provided in the URL is stored in our database to help us better understand which errors are the most common and how many errors each printer experienced.</p>
</div>
<p>The device hash cannot be used to recover anything sensitive like a serial number and isn’t used for anything else than the QR codes feature therefore there are absolutely no security concerns. This feature is turned ON by default. In case you don't want to use this enhanced feature, you can switch it off in the printer's menu by setting the “Device hash in QR” to OFF.</p>
<p>Once you turn it off, the QR code URL will contain only the following: https://help.prusa3d.com/en/12201/</p>
<table class="striped">
<tbody>
<tr style="height: 18px;">
<td style="width: 30.8567%; height: 18px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_device_hash_toggle_upscaled.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_device_hash_toggle_upscaled-300x400.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_device_hash_toggle_upscaled-450x600.jpg 450w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_device_hash_toggle_upscaled-225x300.jpg 225w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/MINI_device_hash_toggle_upscaled-768x1024.jpg 768w" alt="" width="250" height="333" loading="lazy" /></td>
<td style="width: 66.8317%; height: 18px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-Setting-and-sensors.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-Setting-and-sensors-600x360.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-Setting-and-sensors-800x480.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-Setting-and-sensors-300x180.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/SL1-Setting-and-sensors-768x461.jpg 768w" alt="" width="600" height="360" loading="lazy" /></td>
</tr>
</tbody>
</table>
<p style="text-align: center;"><em>Device hash toggle for MINI on the left and for SL1 on the right.</em></p>


<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>Tilt homing failed, check its surroundings, and repeat the action</strong>.</p>
<p>Error name: Tilt homing failed</p>
<p>Error code: #10101</p>
<p>Issued when the printer has a mechanical failure when trying to move the tilt mechanism.</p>
<h3>How to fix it?</h3>
<p>The inability to home the tilt might indicate that there is a physical block of the tilt mechanism or an assembly error in the motor and the connecting rod. Please follow these steps to check the tilt assembly.</p>
<ol>
<li>Open the eight M3x5b screws securing the cover. <strong>Be careful to unplug the USB &amp; Power-cable before removing the cover completely.</strong></li>
</ol>
<table>
<tbody>
<tr>
<td>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01.png" data-hd-height="350px" data-hd-align="center"></p>
</td>
<td>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-800x600.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02.png" data-hd-height="350px" data-hd-align="center"></p>
</td>
<td>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03.png" data-hd-height="350px" data-hd-align="center"></p>
</td>
</tr>
</tbody>
</table>
<ol start="2">
<li style="counter-increment: li 2;">Remove the M4x10 screw holding the right side of the touch screen. It is not necessary to remove the left screw. Just loosen it about a half-turn and you can slide the screen out, like a door. This will give you access to the motor and connecting rod.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11.png" data-hd-height="250px" data-hd-align="center"></p>
<div class="warning-callout">Be very careful with the touch screen flat cable. It is fragile and can be easily damaged or cut.</div>
<ol start="3">
<li>Move the connecting rod with your hands and see if it has a full range of motion and if the blade sensor-trigger is between the two sides of the sensor. If so, jump to step 12. If any resistance is found, continue with the next step.</li>
</ol>
<p><img decoding="async" loading="lazy" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-768x576.jpeg 768w" alt="" width="338" height="254"></p>
<ol start="4">
<li style="counter-increment: li 2;">Remove the M3nN-nut from the screw that connects the tilt-mechanism and the connecting rod. You can do that by using a spanner or pliers to hold the nut and an Allen key to unscrew from the other side.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08-768x576.png 768w" data-hd-height="250px" data-hd-align="center"></p>
<ol start="5">
<li style="counter-increment: li 3;">Remove the two M4x8 screws securing the tilt-motor holder to the bottom plate.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-800x600.png 800w" data-hd-height="250px" data-hd-align="center"></p>
<ol start="6">
<li style="counter-increment: li 4;">Remove the motor-holder and the connecting-rod from the tilt mechanism.</li>
<li>Go to <a href="http://help.prusa3d.com/guide/2-base-tower_8544#9384">Step 18</a> of <a href="http://help.prusa3d.com/guide/2-base-tower_8544">2. Base & Tower</a> of the assembly guide, and remake the connection of the connecting rod and the motor shaft.</li>
</ol>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07.png" data-hd-height="350px" data-hd-align="center"></p>
<div class="tip-callout">Pay extra attention to this step, as not aligning the connecting rod with the protrusion on the holder as instructed will cause the issue again.</div>
<ol start="8">
<li style="counter-increment: li 6;">Reassemble first the tilt to the connecting rod, make sure that after tightening the nut the two parts are in contact.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-05-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-05-533x400.png 533w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-05.png" data-hd-height="250px" data-hd-align="center"></p>
<div class="warning-callout">Do not over-tighten the nut!</div>
<ol start="9">
<li style="counter-increment: li 7;">Connect the motor holder to the bottom plate using the M4x8 screws.</li>
</ol>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-800x600.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06.png" data-hd-height="250px" data-hd-align="center"></p>
<ol start="10">
<li style="counter-increment: li 8;">Make sure that the optical sensor cable has its correct end connected to the sensor. The middle wire should be blue. In case the middle wire on the sensor connector is black, the connection will need to be swapped.</li>
<li>Move the connecting-rod manually and see if it moves smoothly until the blade sensor-trigger is between the two sides of the sensor.</li>
</ol>
<div class="tip-callout">Make sure the sensor is secured!</div>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10-261x300.png 261w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10-348x400.png 348w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10-522x600.png 522w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10.png" data-hd-height="250px" data-hd-align="center"></p>
<ol start="12">
<li style="counter-increment: li 10;">Slide the LCD back to its place, and tighten both M4x10 screws holding it.</li>
</ol>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 200px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11.png" data-hd-height="200px" data-hd-align="center"></p>
<ol start="13">
<li style="counter-increment: li 11;">Connect the USB and Power cable and close the eight M3x5b screws that hold the cover. Tighten them diagonally at first, and add all the screws before tightening them. Pay attention to the cables from the electronics so that they are not pinched.</li>
</ol>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12.png" data-hd-height="250px" data-hd-align="center"></p>
<ol start="14">
<li style="counter-increment: li 12;">Run the wizard again.</li>
</ol>
<p>&nbsp;</p>


Tilt homing failed #10101 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer displays the message: <strong>The resin sensor was not triggered. Check whether the tank and the platform are properly secured.</strong></p>
<p>Error name: Resin sensor error</p>
<p>Error code: #10307</p>
<h3>How to fix it?</h3>
<p>Check the following items</p>
<ul>
<li>If the platform is installed and properly secured.</li>
<li>That the tank is firmly tightened by the side screws.</li>
</ul>
<p>If no issues are found in the tank or platform, check the resin sensor cable by opening the bottom cover.</p>
<table>
<tbody>
<tr>
<td>
<p> </p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-768x576.png 768w" data-hd-height="350px" data-hd-align="center" /></p>
</td>
<td>
<p> </p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-800x600.png 800w" data-hd-height="350px" data-hd-align="center" /></p>
</td>
<td>
<p> </p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03.png" data-hd-height="350px" data-hd-align="center" /></p>
</td>
</tr>
</tbody>
</table>
<p>On the side with the electronics boards from the printer, check if the serrated washer is in contact with the surface of the tilt, the cable is not damaged, and the connector is firmly connected to the board.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3c45010ae65feae0_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3c45010ae65feae0_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3c45010ae65feae0_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3c45010ae65feae0_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3c45010ae65feae0_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3c45010ae65feae0_painted-1536x1152.jpeg 1536w" alt="" width="600" height="450" loading="lazy" /></p>


Resin sensor error #10307 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>The update of the firmware failed! Restart the printer and try again.</strong></p>
<p>Error name: Firmware update failed</p>
<p>Error code: #10534</p>
<h3>How to fix it?</h3>
<p>The flashing of the firmware failed. There can be several reasons for this:</p>
<ul>
<li>The firmware file is corrupted or the USB stick was removed during the flashing process.</li>
<li>The printer lost its network connection during an OTA update.</li>
</ul>
<p>If the previous points check out then look into:</p>
<ul>
<li>The firmware you are flashing is of a version too far ahead of the existing firmware. Try to flash the firmware version after the one you have. For example, do not update directly from 1.2.0 to 1.4.0, without updating to 1.3.0 first.</li>
</ul>
<p>For older versions of the firmware, see the <a href="https://www.prusa3d.com/drivers/firmware-changelog/#sl1">firmware changelog for older firmware</a>.</p>
<h3>Guides</h3>
<p><a href="http://help.prusa3d.com/article/firmware-updating-sl1-sl1s_124776">Firmware updating (SL1)</a></p>


Firmware update failed #10534 (SL1)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>Tower homing failed, make sure there is no obstacle in its path and repeat the action</strong><strong>.</strong></p>
<p>Error name: Tower homing failed</p>
<p>Error code: #10102</p>
<p>Issue when the printer has attempted to home the tower but has found resistance for moving the tower at the start of the calibration.</p>
<h3>How to fix it?</h3>
<h4>Inspect the assembly</h4>
<p>Make sure that the latest <a href="http://help.prusa3d.com/article/firmware-updating-sl1-sl1s_124776">firmware</a> is installed. Check if the three screws indicated in the pictures below are tightened and not moving.</p>
<table style="border-collapse: collapse; width: 100%; height: 18px; border-style: hidden;" border="0">
<tbody>
<tr style="height: 18px;">
<td style="width: 48.8561%; height: 18px; border-style: solid;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/tower-screws.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/tower-screws-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/tower-screws-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/tower-screws-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/tower-screws-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/tower-screws-1536x1152.jpg 1536w" alt="" width="400" height="300"></td>
<td style="width: 48.8561%; height: 18px; border-style: hidden;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/e65aed9db8ee8410_painted.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/e65aed9db8ee8410_painted-534x400.png 534w, https://cdn.help.prusa3d.com/wp-content/uploads/e65aed9db8ee8410_painted-300x225.png 300w" alt="" width="400" height="300"></td>
</tr>
</tbody>
</table>
<p>See if there is nothing physically blocking the movement of the tower. In case you cannot find anything blocking it, add a small amount of lubricant to the ball screw.</p>
<h4>Sensitivity settings</h4>
<p>In some edge cases, you must adjust the sensitivity of the platform axis. Navigate the menu to <em>Settings -&gt; Platform and resin tank</em>, and find the value for the <em>Platform Axis Sensitivity (<span style="color: #2dc26b;">green square</span>)</em>. <strong>The default value is Zero.</strong> If the selftest fails when homing the tower, then do the following:</p>
<ol>
<li>&nbsp;<strong>Make sure the value is set to 0 (zero)</strong> and re-run the calibration procedure. If it passes the selftest, then this is all you need to do. If not, see the next point.</li>
<li>&nbsp;If you get the same error, <strong>increase the sensitivity to +1</strong> and re-run the calibration procedure. If it passes the selftest, then this is all you need to do. If not, see the next point.</li>
<li>If you get the same error, <strong>increase the sensitivity to +2</strong> and re-run the calibration procedure. If it passes the selftest, then this is all you need to do. If not, see the next point.</li>
<li>If you get the same error, <strong>decrease the sensitivity to -1</strong> and re-run the calibration procedure. If it passes the selftest, then this is all you need to do.</li>
</ol>
<p><img decoding="async" loading="lazy" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/c6ab8e0be75eca80_painted.png" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/c6ab8e0be75eca80_painted-600x360.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/c6ab8e0be75eca80_painted-800x480.png 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/c6ab8e0be75eca80_painted-300x180.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/c6ab8e0be75eca80_painted-768x461.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/c6ab8e0be75eca80_painted-1536x922.png 1536w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/c6ab8e0be75eca80_painted.png 1600w" alt="" width="600" height="360"></p>

Tower homing failed #10102 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>The Ambient temperature/UV LED temperature sensor failed.</strong></p>
<p>Error name: Temperature sensor failed</p>
<p>Error code: #10205</p>
<p>The SL1 has several sensors measuring the temperature of various parts and components of the printer. If a wire has been disconnected or damaged, or the sensor itself has been damaged it can produce this error.</p>
<h3>How to fix it?</h3>
<h4>Accessing the mainboard</h4>
<p>First, make sure the plug of the sensor has not detached from the A64 mainboard. To access the mainboard:</p>
<ol>
<li>Remove the 4 screws on the left and right-hand side of the printer.</li>
</ol>
<table style="border-collapse: collapse; width: 100%; height: 295px;" border="0">
<tbody>
<tr style="height: 295px;">
<td style="width: 48.867%; height: 295px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f6c9d2f3605283d.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f6c9d2f3605283d-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f6c9d2f3605283d-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f6c9d2f3605283d-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f6c9d2f3605283d-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f6c9d2f3605283d-1536x1152.jpg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
<td style="width: 48.867%; height: 295px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/7049ff68b245c60c.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/7049ff68b245c60c-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/7049ff68b245c60c-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/7049ff68b245c60c-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/7049ff68b245c60c-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/7049ff68b245c60c-1536x1152.jpg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
</tr>
</tbody>
</table>
<ol start="2">
<li>Unplug the wire that goes to the front USB port, before sliding the front panel off.</li>
</ol>
<table style="border-collapse: collapse; width: 100%; height: 18px;" border="0">
<tbody>
<tr style="height: 18px;">
<td style="width: 48.805%; height: 18px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1adfef152fa6ad1b.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1adfef152fa6ad1b-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1adfef152fa6ad1b-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1adfef152fa6ad1b-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1adfef152fa6ad1b-768x576.jpg 768w" alt="" width="400" height="300" loading="lazy" /></td>
<td style="width: 48.9057%; height: 18px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/c970b1effe1edc4a_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/c970b1effe1edc4a_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/c970b1effe1edc4a_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/c970b1effe1edc4a_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/c970b1effe1edc4a_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/c970b1effe1edc4a_painted-1536x1152.jpeg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
</tr>
</tbody>
</table>
<p>You will now have full access to the mainboard and its connections. On the left picture, you can see the Ambient temperature sensor (thermistor) indicated by the yellow arrow, and the LED temperature sensor is connected together with its power cables, indicated by the green square.</p>
<table style="border-collapse: collapse; width: 100%;" border="0">
<tbody>
<tr>
<td style="width: 48.805%;"><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f2e402547a3b126_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f2e402547a3b126_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f2e402547a3b126_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f2e402547a3b126_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f2e402547a3b126_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/1f2e402547a3b126_painted-1536x1152.jpeg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
<td style="width: 48.9057%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/743e6333d8ab7cd3.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/743e6333d8ab7cd3-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/743e6333d8ab7cd3-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/743e6333d8ab7cd3-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/743e6333d8ab7cd3-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/743e6333d8ab7cd3-1536x1152.jpg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
</tr>
</tbody>
</table>
<p> </p>
<h4>Ambient temperature sensor</h4>
<p>The sensor itself is found inside the tower, behind the back-plate. The sensor can be accessed by removing the screws on the sides</p>
<table style="border-collapse: collapse; width: 100%;" border="0">
<tbody>
<tr>
<td style="width: 48.805%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/fd157deb23c62893.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/fd157deb23c62893-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/fd157deb23c62893-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/fd157deb23c62893-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/fd157deb23c62893-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/fd157deb23c62893-1536x1152.jpg 1536w" alt="" width="400" /></td>
<td style="width: 48.9057%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/84e34282a2551a1b.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/84e34282a2551a1b-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/84e34282a2551a1b-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/84e34282a2551a1b-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/84e34282a2551a1b-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/84e34282a2551a1b-1536x1152.jpg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
</tr>
</tbody>
</table>
<h4> </h4>
<h4><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/0fcf23bd33e55b60_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/0fcf23bd33e55b60_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/0fcf23bd33e55b60_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/0fcf23bd33e55b60_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/0fcf23bd33e55b60_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2020/12/0fcf23bd33e55b60_painted-1536x1152.jpeg 1536w" alt="" width="600" height="450" loading="lazy" /></h4>
<p>You can check the integrity of the ambient temperature sensor using a multimeter. Unplug it from the board and measure the resistance across the leads of the connector, as illustrated below. Set your meter to 200K to be within the correct range. More info in <a href="http://help.prusa3d.com/article/multimeter-usage_2117">Multimeter usage</a>.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/mm-thermistor.jpg" alt="" width="400" height="289" loading="lazy" /></p>
<h4>UV LED temperature sensor</h4>
<p>This sensor is integrated into the LED PCB. If you receive the error that this has failed, check and reseat the connections of the led panel, but it may have to be replaced. It is an assembly with a heatsink and fan and can be accessed from the bottom of the printer.</p>
<table style="border-collapse: collapse; width: 100%;" border="0">
<tbody>
<tr>
<td style="width: 48.8194%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/cf1cdbf2c0f77b18_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/cf1cdbf2c0f77b18_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/cf1cdbf2c0f77b18_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/cf1cdbf2c0f77b18_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/cf1cdbf2c0f77b18_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/cf1cdbf2c0f77b18_painted-1536x1152.jpeg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
<td style="width: 48.9107%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/c318aa2e8f5889e2_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/c318aa2e8f5889e2_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/c318aa2e8f5889e2_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/c318aa2e8f5889e2_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/c318aa2e8f5889e2_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/c318aa2e8f5889e2_painted-1536x1152.jpeg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
</tr>
</tbody>
</table>
<h3>Replacement guides</h3>
<p><a href="http://help.prusa3d.com/guide/how-to-replace-a-uv-led-assembly-sl1_149828">How to replace a UV LED assembly (SL1)</a></p>


Temperature sensor failed #10205 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <span data-sheets-formula-bar-text-style="font-size:13px;color:#000000;font-weight:normal;text-decoration:none;font-family:'Arial';font-style:normal;text-decoration-skip-ink:none;"><strong>Incorrect RPM reading of the fan. Please check its wiring and connection.</strong><br /></span></p>
<p>Error name: Fan failure</p>
<p>Error code: #10106</p>
<p>This error indicates that one of the fans of the printer is not working correctly. It has measured the RPM of the SL1 fans and found one of them out of the accepted range.</p>
<h3>How to fix it?</h3>
<p>The SL1 has three fans: the LED cooling fan, the filter fan, and the right blower fan. If the error appears, please follow maintenance steps for the fan that generated the issue: <a href="http://help.prusa3d.com/article/sl1-sl1s-maintenance_1951">SL1/SL1S maintenance</a>. When doing that, also check the cable connections of the fan to the mainboard.</p>
<p><img decoding="async" loading="lazy" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-cable-connections.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-cable-connections-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-cable-connections-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-cable-connections-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-cable-connections-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-cable-connections-1536x1152.jpg 1536w" alt="" width="461" height="346"></p>
<p>If the right blower fan is the one that failed, make sure that the blower gasket is still in place.</p>
<p>Go to the printer menu in <em>LCD menu -&gt; Settings -&gt; Advanced settings -&gt; Wizard</em>. The printer will run the self-test. In case the fan also fails during the self-test, switch the connection of two of the fans, and see if the error will be transferred to the new fan. If the error is transferred, the fan that had the error originally will need to be replaced.</p>
<h3>How to replace the part?</h3>
<p><a href="http://help.prusa3d.com/guide/how-to-replace-a-blower-fan-sl1_127607">How to replace a blower fan (SL1)</a></p>


Fan failure #10106 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>Display test failed, check the connection between the display and the A64</strong> <strong>board</strong>.</p>
<p>Error name: Display test failed</p>
<p>Error code: #10120</p>
<p>&nbsp;Issued when the printer was not able to test the print display.</p>
<h3>How to fix it?</h3>
<p>Check the cable connection to the mainboard. Be careful as the print display flat cable is very fragile.</p>
<table style="border-collapse: collapse; width: 100%; height: 313px;" border="0">
<tbody>
<tr style="height: 295px;">
<td style="width: 48.8442%; height: 295px;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/print-display-connector.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/print-display-connector-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/print-display-connector-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/print-display-connector-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/print-display-connector-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/print-display-connector-1536x1152.jpg 1536w, https://cdn.help.prusa3d.com/wp-content/uploads/print-display-connector.jpg 1600w" alt="" width="400" height="300"></td>
<td style="width: 48.8442%; height: 295px;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/a3a0435e448b0b9b_painted.jpeg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/a3a0435e448b0b9b_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/a3a0435e448b0b9b_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/a3a0435e448b0b9b_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/a3a0435e448b0b9b_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/a3a0435e448b0b9b_painted-1536x1153.jpeg 1536w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/10/a3a0435e448b0b9b_painted.jpeg 1600w" alt="" width="400" height="300"></td>
</tr>
<tr style="height: 18px;">
<td style="width: 48.8442%; height: 18px; text-align: center;">Original Prusa SL1 display cable</td>
<td style="width: 48.8442%; height: 18px; text-align: center;">Original Prusa SL1S SPEED display cable</td>
</tr>
</tbody>
</table>
<h3>How to replace the part</h3>
<p><a href="http://help.prusa3d.com/guide/how-to-replace-the-print-display-sl1_133295">How to replace the print display (SL1)</a></p>


Display test failed #10120 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>Please turn on the HTTP digest (which is the recommended security option) or update the API key. You can find it in Settings &gt; Network &gt; Login credentials</strong>.</p>
<p>Error name: Invalid API key</p>
<p>Error code: #10405</p>
<p>This error shows when the print is sent directly from PrusaSlicer, and the API key is incorrect.</p>
<h3>How to fix it?</h3>
<p>Verify your API key with this guide: <a href="http://help.prusa3d.com/article/sending-g-codes-to-printer-via-network-prusaconnect-prusalink-octoprint_196761">Sending G-codes to printer via network (PrusaConnect, PrusaLink, Octoprint)</a>.</p>
<p>In the printer menu, go to <em>Settings -&gt; Network -&gt; Login credentials</em>. Check if the API key inserted there is the same as the one in PrusasSlicer.</p>
<p><img decoding="async" loading="lazy" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/API-key_Login_Credentials_2021-06_11.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/API-key_Login_Credentials_2021-06_11-600x360.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/API-key_Login_Credentials_2021-06_11-300x180.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/API-key_Login_Credentials_2021-06_11-768x461.jpg 768w" alt="" width="600" height="360"></p>


Invalid API key #10405 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>The printer uses HTTP digest security. Please enable it also in your slicer (recommended), or turn off this security option in the printer. You can find it in Settings &gt; Network &gt; Login credentials</strong>.</p>
<p>Error name: Unauthorized&nbsp;</p>
<p>Error code: #10406&nbsp;</p>
<p>This error shows when the print is sent directly from PrusaSlicer, and the user name or printer password is incorrect.</p>
<h3>How to fix it?</h3>
<p>When adding a <a href="http://help.prusa3d.com/article/sending-g-codes-to-printer-via-network-prusaconnect-prusalink-octoprint_196761">physical printer</a> to PrusaSlicer or using <a href="http://help.prusa3d.com/article/prusalink-sl1-sl1s_146094">PrusaLink</a> (previously Prusa Connect Local), it is possible to choose the type of authorization for accessing the printer as <strong>API Key or HTTP digest</strong>. If using HTTP Digest, <strong>make sure that your User and Password on the printer are the same as the one in PrusaSlicer.</strong> Alternatively, it is possible to change the authorization to API key both in the printer and in PrusaSlicer.</p>
<table style="border-collapse: collapse; width: 100%;" border="0">
<tbody>
<tr>
<td style="width: 48.8561%;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/Slicer-physical-printer-1.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/Slicer-physical-printer-1-600x322.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/Slicer-physical-printer-1-800x430.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/Slicer-physical-printer-1-300x161.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/Slicer-physical-printer-1-768x412.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/Slicer-physical-printer-1-1536x825.jpg 1536w" alt="" width="400" height="215"></td>
<td style="width: 48.8561%;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/HTTP-digest_Login_Credentials_2021-06_11-42_1.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/HTTP-digest_Login_Credentials_2021-06_11-42_1-600x360.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/HTTP-digest_Login_Credentials_2021-06_11-42_1-300x180.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/HTTP-digest_Login_Credentials_2021-06_11-42_1-768x461.jpg 768w" alt="" width="400" height="240"></td>
</tr>
</tbody>
</table>


Unauthorized #10406 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>The printer model was not detected.</strong></p>
<p>Error name: Unknown printer model</p>
<p>Error code: #10323</p>
<p>This error happens when the printer cannot identify if the printer is the Original Prusa SL1 or SL1S SPEED. The model of the printer is determined by the exposure display.</p>
<h3>How to fix it?</h3>
<h4>Update the firmware again</h4>
<p>If the error appears after updating the firmware and the printer was previously working fine, please download and flash the firmware again using the supplied USB stick (not OTA). Please see our <a href="http://help.prusa3d.com/article/firmware-updating-sl1-sl1s_124776#usb-firmware-upgrade-downgrade">dedicated article for details</a>.</p>
<h4>Checking the display's connection</h4>
<p><strong>If updating the firmware again does not resolve it</strong>, it is necessary to check the print display's connection and its cable. Open the bottom cover from the printer, being careful of the USB &amp; Power cable.</p>
<table>
<tbody>
<tr>
<td>
<p> </p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01.png" data-hd-height="350px" data-hd-align="center" /></p>
</td>
<td>
<p> </p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-800x600.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02.png" data-hd-height="350px" data-hd-align="center" /></p>
</td>
<td>
<p> </p>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03.png" data-hd-height="350px" data-hd-align="center" /></p>
</td>
</tr>
</tbody>
</table>
<p>Check if the display is well connected to the board and that the cable is facing the outside of the printer, not stuck behind the electronics holder.</p>
<table style="border-collapse: collapse; width: 100%; height: 312px;" border="0">
<tbody>
<tr style="height: 294px;">
<td style="width: 48.8442%; height: 294px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/5a0dce03496f90ca.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/5a0dce03496f90ca-533x400.jpg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/5a0dce03496f90ca-800x600.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/5a0dce03496f90ca-300x225.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/5a0dce03496f90ca-768x576.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/5a0dce03496f90ca-1536x1152.jpg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
<td style="width: 48.8442%; height: 294px;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/9e445ffced4bc85e_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/9e445ffced4bc85e_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/9e445ffced4bc85e_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/9e445ffced4bc85e_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/9e445ffced4bc85e_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/06/9e445ffced4bc85e_painted-1536x1152.jpeg 1536w" alt="" width="400" height="300" loading="lazy" /></td>
</tr>
<tr style="height: 18px;">
<td style="width: 48.8442%; text-align: center; height: 18px;"><em>Connection on the SL1</em></td>
<td style="width: 48.8442%; text-align: center; height: 18px;"><em>Connection on the SL1S</em></td>
</tr>
</tbody>
</table>


Unknown printer model #10323 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer displaying the message: <strong>Internal memory full, please delete some of your projects first.</strong></p>
<p>Error name: Internal memory full</p>
<p>Error code: <span data-sheets-value="{&quot;1&quot;:2,&quot;2&quot;:&quot;#10516&quot;}" data-sheets-userformat="{&quot;2&quot;:33554945,&quot;3&quot;:{&quot;1&quot;:0},&quot;12&quot;:0,&quot;28&quot;:1}">#10516</span></p>
<p><span data-sheets-value="{&quot;1&quot;:2,&quot;2&quot;:&quot;Projects are copied to the internal storage before the print from USB (allowing to unplug the USB). Also the projects are uploaded to internal storage from slicer. This error is displayed when there is not enough internal space to complete the operation.&quot;}" data-sheets-userformat="{&quot;2&quot;:33554945,&quot;3&quot;:{&quot;1&quot;:0},&quot;12&quot;:0,&quot;28&quot;:1}">Projects are copied from the USB flash drive to the internal storage, before the print (allowing to unplug the USB). Also, projects are uploaded to internal storage when sent directly from PrusaSlicer. This error is displayed when there is not enough internal space to complete the operation.</span></p>
<h3>How to fix it?</h3>
<p><span data-sheets-value="{&quot;1&quot;:2,&quot;2&quot;:&quot;This is related to stable, beta, dev update channels. The user can switch stable&lt;-&gt;beta in advanced settings -&gt; firmware update. The admin interface allows to switch also to dev. This signals switch failure. Most probably the printer configuration is somehow broken. An update to latest build in the current channel or factory reset could help.&quot;}" data-sheets-userformat="{&quot;2&quot;:33554945,&quot;3&quot;:{&quot;1&quot;:0},&quot;12&quot;:0,&quot;28&quot;:1}">Delete files from the internal storage by swiping right on the file title and selecting Delete.</span></p>


Internal memory full #10516 (SL1/SL1S)

<h3>What happened?</h3>
<p><span data-sheets-formula-bar-text-style="font-size:13px;color:#000000;font-weight:normal;text-decoration:none;font-family:'Arial';font-style:normal;text-decoration-skip-ink:none;">The printer is displaying the message: <strong>RPM of (fan)s not in range. Check if the fan is connected correctly.</strong><br /></span></p>
<p>Error name: Fan RPM not in range</p>
<p>Error code: #10122</p>
<p>Issued if the RPM of any of the printer's fans is not within their limits of use when measured, during the calibration wizard.</p>
<h3>How to fix it?</h3>
<p><strong>The SL1 has three fans:</strong></p>
<ul>
<li><strong><span style="color: #843fa1;">The LED cooling fan (indicated in the picture by a purple arrow on the left).</span></strong></li>
<li><strong><span style="color: #169179;">The right blower fan (indicated in the picture by a green arrow in the middle).</span></strong></li>
<li><strong><span style="color: #236fa1;">The rear filter fan (indicated in the picture by a blue arrow on the right).</span></strong></li>
</ul>
<p>If the warning appears, please follow the maintenance steps for the fan that generated the issue: <a href="http://help.prusa3d.com/article/sl1-sl1s-maintenance_1951#fan-cleaning-removing-dust">SL1/SL1S maintenance</a>. When doing that, also check the cable connections of the fan to the mainboard.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3f898d99d9df618f_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3f898d99d9df618f_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3f898d99d9df618f_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3f898d99d9df618f_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3f898d99d9df618f_painted-768x576.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/3f898d99d9df618f_painted-1536x1152.jpeg 1536w" alt="" width="600" height="450" loading="lazy" /></p>
<div class="note-callout">If the right blower fan is the one that showed the warning, make sure that the blower gasket is still in place.</div>
<p>Go to the printer menu in <em>LCD menu -&gt; Settings -&gt; Calibration -&gt; Wizard</em>. The printer will run the self-test. In case the fan also fails during the self-test, switch the connection of two of the fans, and see if the warning will be transferred to the new fan. If the error is transferred, the fan that had the warning originally may need to be replaced.</p>
<h3>Parts replacement guide(s)</h3>
<p><a href="http://help.prusa3d.com/guide/how-to-replace-a-blower-fan-sl1_127607">How to replace a blower fan (SL1)</a></p>

Fan RPM not in range #10122 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>No USB storage present</strong></p>
<p>Error name: USB drive not detected&nbsp;</p>
<p>Error code: #10528</p>
<h3>How to fix it?</h3>
<p>The printer will copy the project to its internal memory during printing. The USB flash drive has been removed before it could do so or the USB stick is corrupted.</p>
<p>Make sure the USB flash drive is properly inserted and try again. Do not remove the USB stick before the print has started.</p>
<p>If it persists, try a different USB flash drive.</p>


USB drive not detected #10528 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>Failed to reach tilt endstop, please check that the cable is connected and repeat the action</strong>.</p>
<p>Error name: Tilt endstop not reached</p>
<p>Error code: #10115</p>
<p>Issued when the printer did not manage to move the connecting rod as it should.</p>
<h3>How to fix it?</h3>
<p>The inability to home the tilt might indicate that there is a physical block of the tilt mechanism or an assembly error in the motor and the connecting rod.</p>
<ol>
<li>Open the eight M3x5b screws securing the cover. <strong>Be careful to unplug the USB &amp; Power-cable before removing the cover completely.</strong></li>
</ol>
<table>
<tbody>
<tr>
<td>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-01.png" data-hd-height="350px" data-hd-align="center"></p>
</td>
<td>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02-800x600.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-02.png" data-hd-height="350px" data-hd-align="center"></p>
</td>
<td>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-03.png" data-hd-height="350px" data-hd-align="center"></p>
</td>
</tr>
</tbody>
</table>
<ol start="2">
<li style="counter-increment: li 2;">Remove the M4x10 screw holding the right side of the touch screen. It is not necessary to remove the left screw. Just loosen it about a half-turn and you can slide the screen out, like a door. This will give you access to the motor and connecting rod.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11.png" data-hd-height="250px" data-hd-align="center"></p>
<div class="warning-callout">Be very careful with the touch screen flat cable. It is fragile and can be easily damaged or cut.</div>
<ol start="3">
<li>Move the connecting rod with your hands and see if it has a full range of motion and if the blade sensor-trigger is between the two sides of the sensor. If so, jump to step 12. If any resistance is found, continue with the next step.</li>
</ol>
<p><img decoding="async" loading="lazy" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-533x400.jpeg 533w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-800x600.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-300x225.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/6469b043fdec9c7d_painted-768x576.jpeg 768w" alt="" width="338" height="254"></p>
<ol start="4">
<li style="counter-increment: li 2;">Remove the M3nN-nut from the screw that connects the tilt-mechanism and the connecting rod. You can do that by using a spanner or pliers to hold the nut and an Allen key to unscrew from the other side.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-08-768x576.png 768w" data-hd-height="250px" data-hd-align="center"></p>
<ol start="5">
<li style="counter-increment: li 3;">Remove the two M4x8 screws securing the tilt-motor holder to the bottom plate.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-09-800x600.png 800w" data-hd-height="250px" data-hd-align="center"></p>
<ol start="6">
<li style="counter-increment: li 4;">Remove the motor-holder and the connecting-rod from the tilt mechanism.</li>
<li>Go to <a href="http://help.prusa3d.com/guide/2-base-tower_8544#9384">Step 18</a> of <a href="http://help.prusa3d.com/guide/2-base-tower_8544">2. Base & Tower</a> of the assembly guide, and remake the connection of the connecting rod and the motor shaft.</li>
</ol>
<p><img decoding="async" style="max-height: 350px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-07.png" data-hd-height="350px" data-hd-align="center"></p>
<div class="tip-callout">Pay extra attention to this step, as not aligning the connecting rod with the protrusion on the holder as instructed will cause the issue again.</div>
<ol start="8">
<li style="counter-increment: li 6;">Reassemble first the tilt to the connecting rod, make sure that after tightening the nut the two parts are in contact.</li>
</ol>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-05-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-05-533x400.png 533w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-05.png" data-hd-height="250px" data-hd-align="center"></p>
<div class="warning-callout">Do not over-tighten the nut!</div>
<ol start="9">
<li style="counter-increment: li 7;">Connect the motor holder to the bottom plate using the M4x8 screws.</li>
</ol>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06-800x600.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-06.png" data-hd-height="250px" data-hd-align="center"></p>
<ol start="10">
<li style="counter-increment: li 8;">Make sure that the optical sensor cable has its correct end connected to the sensor. The middle wire should be blue. In case the middle wire on the sensor connector is black, the connection will need to be swapped.</li>
<li>Move the connecting-rod manually and see if it moves smoothly until the blade sensor-trigger is between the two sides of the sensor.</li>
</ol>
<div class="tip-callout">Make sure the sensor is secured!</div>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10-261x300.png 261w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10-348x400.png 348w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10-522x600.png 522w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-10.png" data-hd-height="250px" data-hd-align="center"></p>
<ol start="12">
<li style="counter-increment: li 10;">Slide the LCD back to its place, and tighten both M4x10 screws holding it.</li>
</ol>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 200px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-11.png" data-hd-height="200px" data-hd-align="center"></p>
<ol start="13">
<li style="counter-increment: li 11;">Connect the USB and Power cable and close the eight M3x5b screws that hold the cover. Tighten them diagonally at first, and add all the screws before tightening them. Pay attention to the cables from the electronics so that they are not pinched.</li>
</ol>
<p>&nbsp;</p>
<p><img decoding="async" style="max-height: 250px; display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12-768x576.png 768w" src="https://cdn.help.prusa3d.com/wp-content/uploads/SL1-Tilt-mechanism-error-12.png" data-hd-height="250px" data-hd-align="center"></p>
<ol start="14">
<li style="counter-increment: li 12;">Run the wizard again.</li>
</ol>
<p>&nbsp;</p>


Tilt endstop not reached #10115 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message <strong>The ambient temperature is too low, the print can continue, but it might fail.</strong></p>
<p>Error name: Ambient temp. too cold</p>
<p>Error code: #10703</p>
<h3>How to fix it?</h3>
<p>Make sure that the printer is not outdoors, or in an environment below 16 ºC. The ambient temperature being too cold might change the necessary exposure time.</p>


Ambient temperature too cold #10703 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>Requested intensity cannot be reached by max. allowed PWM</strong></p>
<p>Error name: UV intensity too low</p>
<p>Error code: #10318</p>
<p>The most probable reason for this error is either the print display or UV LED set. Either the LEDs do not produce enough light, or the print display is blocking too much light.</p>
<h3>How to fix it?</h3>
<h4>Faulty print display or UV LED panel</h4>
<p>Check whether the UV panel and LCD screen work as intended – Run the Display test, found at <em>Settings -&gt; Calibration -&gt; Display test</em> (purple square)<em>.</em> Follow the onscreen instructions.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/868f032dfb27b102_painted.jpeg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/868f032dfb27b102_painted-600x360.jpeg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/868f032dfb27b102_painted-800x480.jpeg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/868f032dfb27b102_painted-300x180.jpeg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/868f032dfb27b102_painted-768x461.jpeg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/03/868f032dfb27b102_painted-1536x922.jpeg 1536w" alt="" width="600" height="360" loading="lazy" /></p>
<p>Check if the logo appears on the display as below. If there are "holes" in the image, the print display must be replaced.</p>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/testLCDSl1.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/testLCDSl1-300x169.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/testLCDSl1-600x338.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/testLCDSl1-768x432.jpg 768w" alt="" /></p>
<p>If it remains completely, it may have a faulty UV LED panel. Check its wiring by unplugging it and plugging it back in, making sure the connector is seated properly. Test the display again and if it still does not work it will have to be replaced.</p>
<h3>Guides</h3>
<p>See our guide for <a href="http://help.prusa3d.com/guide/how-to-replace-the-print-display-sl1_133295">replacing the print display</a>.</p>


UV intensity too low #10318 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer displaying the message: <strong>Speaker test failed, please check the connection and repeat the action.</strong></p>
<p>Error name: Speaker test failed</p>
<p>Error code: #10310</p>
<p>The speaker test will play the user a sound that is confirmed by user-input. If the sound is played by the test, and you select you did not hear it, it will give this error.</p>
<h3>How to fix it?</h3>
<p>Make sure the connector is well seated using the guide below and polarity is correct (Red on the Right, by the +).</p>
<p>Also inspect the speaker, found at the back of the Touch Screen, whether its wires are secure, and no solder pads have come loose.</p>
<h3>Replacement guide(s)</h3>
<p><a href="http://help.prusa3d.com/article/saving-log-file-sl1-sl1s_142334">Saving log file (SL1/SL1S)</a></p>


Speaker test failed #10310 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>Measured resin volume [amount] ml is higher than required for this print. Make sure that the resin level does not exceed the 100% mark and restart the print.</strong></p>
<p>Error name: Resin too high</p>
<p>Error code: #10109</p>
<p>Issued when the resin level is too high and needs some resin needs to be removed before the print.</p>
<h3>How to fix it?</h3>
<p>If the print starts, the tank movements might spill the resin to the parts below. Pour some of the resin back into the bottle through a filter until you have just the amount of resin required for the print.</p>
<p>If the resin spills from the tank please clean as much as possible with a paper towel and contact our <a href="http://help.prusa3d.com/article/customer-support_2287">Customer support</a>.</p>


Resin too high #10109 (SL1/SL1S)

<h3>What happened?</h3>
<p>The printer is displaying the message: <strong>This project was prepared for a different printer</strong>.</p>
<p>Error name: Wrong printer model</p>
<p>Error code: #10544&nbsp;</p>
<p>This error informs that the project to be printed has not been sliced for the same printer that you are trying to print it on. For example, you have the Original Prusa SL1S Speed and the model has been sliced for the Original Prusa SL1.</p>
<h3>How to fix it?</h3>
<p>Open the project in Prusa Slicer and select the correct printer on the right sidebar. In case you cannot see your printer, go in PrusaSlicer to <em>Configuration -&gt; Configuration Wizard -&gt; Prusa MSLA</em>, and make sure that your printer is selected.</p>
<table style="border-collapse: collapse; width: 100%;" border="0">
<tbody>
<tr>
<td style="width: 48.8561%;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/Slicer-printer-menu.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/Slicer-printer-menu-600x322.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/Slicer-printer-menu-800x430.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/Slicer-printer-menu-300x161.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/Slicer-printer-menu-768x413.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/Slicer-printer-menu-1536x825.jpg 1536w" alt="" width="400" height="215"></td>
<td style="width: 48.8561%;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/MSLA-slicer.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/MSLA-slicer-577x400.jpg 577w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/MSLA-slicer-800x554.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/MSLA-slicer-300x208.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/MSLA-slicer-768x532.jpg 768w" alt="" width="400" height="277"></td>
</tr>
</tbody>
</table>


Wrong printer model #10544 (SL1/SL1S)

1.01

<ul>
<li>Note: The firmware downgrade is not supported for this version</li>
<li>Initial version.</li>
</ul>


1.0.5

<ul>
<li>Note: The firmware downgrade is not supported for this version</li>
<li>Fixed UI updates at print page right after timezone change</li>
</ul>


1.1.1

<ul>
<li>New chapter with printing errors</li>
<li>Warranty info added</li>
<li>Minor adjustments and improvements</li>
</ul>


1.02

<ul>
<li>Note: The firmware downgrade is not supported for this version</li>
<li>Multiple languages support</li>
<li>Touch UI improvements</li>
<li>Wizard improvements</li>
<li>Factory defaults protection</li>
<li>Bug fixes</li>
<li>Other changes (complete release log below)</li>
</ul>


1.2.0

<p>This is a bugfix release.</p>
<ul>
<li>Fixed UV LED exposure timing</li>
<li>Auto adjust tower profiles for reliable homing</li>
<li>Fixed bugs (see the full changelog)</li>
</ul>


1.2.1

<ul>
<li>Updated to match the latest changes in 1.2.0 firmware</li>
</ul>


1.03

<ul>
<li>Note: The firmware downgrade is not supported for this version</li>
<li>Print quality improvements</li>
<li>Vibration elimination while printing</li>
<li>Blower fan fixes</li>
</ul>


1.2.2

<ul>
<li>Note: The firmware downgrade is not supported for this version</li>
<li>Fixed tilt jerk in calibration</li>
<li>Fixed rehoming tilt when printing</li>
</ul>


1.2.3

<ul>
<li>New network management</li>
<li>New update system (OTA)</li>
<li>Localized user interface</li>
<li>User resin calibration (<a href="https://help.prusa3d.com/article/z2in03stzn-sl-1-resin-calibration">check out the guide and video</a>)</li>
<li>Improved graphics in Wizard/Calibration</li>
<li>Printer not calibrated warning at startup</li>
<li>Phantom click resistant UI</li>
<li>Fixed bugs</li>
</ul>


1.3.0

<ul>
<li>New web interface</li>
<li>Software licenses updated</li>
<li>Fixed bugs</li>
</ul>


1.3.2

1.3.3

<ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0">
<li>Updated texts to match the latest firmware</li>
<li>Calibration of custom resins added</li>
<li>Hollowing in PrusaSlicer added</li>
<li>PrusaConnect / Network printing section updated</li>
</ul>


1.04

<p>To install this version you have to update from 1.3.0 or newer.</p>
<ul>
<li>User UV calibration (<a href="http://help.prusa3d.com/guide/how-to-replace-the-print-display-sl1_133295">calibration guide</a>)</li>
<li>Parallel pre-print checks</li>
<li>Manual check for firmware updates</li>
<li>Simplified fan checks</li>
<li>Upload notifications redesigned</li>
<li>Fixed bugs</li>
</ul>


1.4.0

<ul>
<li>Added information reflecting changes in firmware 1.4.0</li>
<li>Added instructions on print display replacement and UV LED panel calibration</li>
<li>Updated firmware update information</li>
</ul>


1.05

<ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0">
<li>Fixed missing timezones</li>
<li>Fixed UV calibrator disconnection</li>
<li>Fixed data corruption on USB</li>
<li>Fixed resin volume warning</li>
<li>Fixed preprint warning delay</li>
<li>Fixed "printer is not calibrated" message during calibration</li>
<li>Improved system logs</li>
<li>Other bug fixes</li>
</ul>


1.4.1

<ul>
<li>UV calibration algorithm updated</li>
<li>Fixed cover check after resin refill</li>
</ul>


1.4.2

<ul>
<li>QR Error codes</li>
<li>Redesigned Settings menu</li>
<li>Advanced Prusa Connect Local</li>
<li>One-click print functionality</li>
<li>Top bar notifications</li>
<li>Firmware upgrade &amp; downgrade</li>
<li>Backlight and screensaver control</li>
<li>Project files thumbnails</li>
<li>Log upload improved</li>
<li>Print statistics</li>
<li>Others</li>
<li>Fixed bugs</li>
</ul>


1.5.0

<p>The firmware can be installed on both SL1 and SL1S SPEED, it will recognize the printer based on the print display and set the parameters accordingly.</p>
<ul>
<li>Updated Wizards and Selftest wizard</li>
<li>SL1S SPEED print profiles</li>
<li>Speed of first layers</li>
<li>Automatic print adjustments (large objects)</li>
<li>New power button behavior</li>
<li>Transition to DBus for IPC</li>
<li>Improved translations and localisations</li>
<li>Improved screensaver</li>
<li>Improved logging procedure</li>
<li>PrusaLink updates</li>
<li>Print display time counter</li>
<li>Improved cooling</li>
<li>Screen compositor Weston</li>
</ul>


1.6.0

<ul>
<li>PrusaSlicer 2.3.3
<ul>
<li>Patch release - fixing the bug in handling FDM multi-material project and configuration files</li>
</ul>
</li>
</ul>


2.3.3

<p>The firmware can be installed on both SL1 and SL1S SPEED, it will recognize the printer based on the print display and set the parameters accordingly. This firmware is required for the upgrade from SL1 to SL1S.</p>
<ul>
<li style="font-weight: 400;" aria-level="1">New print display driver</li>
<li style="font-weight: 400;" aria-level="1">Support for diacritics in filenames</li>
<li style="font-weight: 400;" aria-level="1">Improved display counter</li>
<li style="font-weight: 400;" aria-level="1">PrusaLink improvement</li>
<li style="font-weight: 400;" aria-level="1">Preprint checks</li>
<li style="font-weight: 400;" aria-level="1">Increased space for user prints</li>
<li style="font-weight: 400;" aria-level="1">Other improvements and bug fixes</li>
</ul>


1.6.1

<p>This release is a small hotfix for the SL1 and SL1S:</p>
<ul>
<li>Factory reset fixed</li>
</ul>
<p>See full release log for more details.</p>


1.6.2

<p>This release includes two changes in the user interface and several bug fixes for the SL1 and SL1S:</p>
<ul>
<li>Preprint workflow changed</li>
<li>Print profile selection added to PrusaLink</li>
</ul>
<p>See full release log for more details.</p>


1.6.3

<ul>
<li>Multi-material painting</li>
<li>Improved supports and bridging</li>
<li>Shape gallery</li>
<li>Fuzzy skin</li>
<li>Windows dark mode</li>
<li>Brim for individual objects</li>
<li>Negative volumes</li>
<li>Automatic color change for logos and signs</li>
<li>Tip of the day notifications</li>
<li>Model simplification</li>
<li>Support for 3DLabPrint airplane models</li>
<li>New 3rd party printer profiles</li>
<li>…and more!</li>
</ul>


2.4.0

<ul>
<li>Added support for M1</li>
<li>Bug fixes</li>
</ul>


1.6.4

<ul>
<li>G-Code Substitutions</li>
<li>Added profiles for Anycubic 4Max Pro 2.0</li>
<li>Added Artillery Hornet profile</li>
<li>Added RatRig V-Core and V-Minion bundle</li>
<li>Added Jubilee bundle</li>
</ul>


2.4.1

<ul>
<li>Support for new rear fan</li>
<li>Support for new DAC converter</li>
</ul>
<p></p>

1.6.6

<ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0" data-border="0">
<li data-stringify-indent="0" data-stringify-border="0">Updated translations</li>
<li data-stringify-indent="0" data-stringify-border="0">Added profiles for Snapmaker printers</li>
<li data-stringify-indent="0" data-stringify-border="0">Added profiles for Zonestar printers</li>
<li data-stringify-indent="0" data-stringify-border="0">Bug fixes</li>
</ul>
<p></p>

2.4.2

1.7.0

<ul>
<li>New perimeter generator Arachne</li>
<li>STEP file format support</li>
<li>Lightning infill</li>
<li>Improved seam placement based on the visibility</li>
<li>Pressure equalizer</li>
<li>New printer and material profiles</li>
<li>Many bugfixes and smaller improvements</li>
<li>Offline unattended installation for mass deploys (in Drivers &amp; Apps package installator).</li>
</ul>
<p></p>

2.5.0

<ul>
<li>Fixed bugs</li>
<li>Known issues</li>
</ul>
<p></p>

1.7.1


<ul>
<li>Improved 'Monotonic lines' fill pattern</li>



<li>Improved Acceleration control</li>



<li>Specific object arrangement for XL</li>



<li>Original Prusa XL profiles</li>



<li>Updated translations</li>



<li>Bugfixes</li>
</ul>


2.5.1


<ul>
<li>Original Prusa MK4 profiles</li>
</ul>


2.5.2


<ul>
<li>Organic supports</li>



<li>Automatic support painter</li>



<li>Text embossing tool</li>



<li>Improved cut tool</li>



<li>Adding connectors and dowel pins</li>



<li>Measurement tool</li>



<li>Dynamic overhang speed</li>



<li>Improved Ensure vertical shell thickness</li>



<li>Smart extending of sparse infill</li>
</ul>


2.6.0


<ul>
<li>New Arrange tool options</li>



<li>New Cut tool options</li>



<li>Per-symbol text projection on surface</li>



<li>Interlocking of painted areas for MMU printing</li>
</ul>


2.6.1


<ul>
<li>New SVG support</li>



<li>Binary G-Code (.bgcode) export support + conversion</li>



<li>Arc fitting support </li>
</ul>


2.7.0


<ul>
<li>Binary G-code settings</li>



<li>Wipe tower weight</li>



<li>Bug fixes</li>
</ul>


2.7.1


<ul>
<li>Project thumbnail page while printing</li>



<li>Elephant foot and exposure times compensation fix</li>



<li>Help pages split between M1 and SL1/S</li>



<li>Red screen (error page) with a scrollable layout</li>



<li>Bug fixes</li>



<li>Known issues</li>
</ul>


1.7.2


<ul>
<li>Improvements to multi-material printing</li>



<li>Vase mode smoothing</li>



<li>Support for 3MF files generated in BambuStudio</li>



<li>Metadata with boundary polygon of each object</li>
</ul>


2.7.3


<ul>
<li>Objects from 3MFs generated by BambuStudio now retain multimaterial painting when loaded</li>



<li>Fixed a bug where downloading files from Printables did not work when enabled in Preferences</li>
</ul>


Original Prusa SL1

QR Error codes

Articles

QR Error codes

Tilt homing failed #10101 (SL1/SL1S)

Resin sensor error #10307 (SL1/SL1S)

Firmware update failed #10534 (SL1)

Tower homing failed #10102 (SL1/SL1S)

Temperature sensor failed #10205 (SL1/SL1S)

Fan failure #10106 (SL1/SL1S)

Display test failed #10120 (SL1/SL1S)

Invalid API key #10405 (SL1/SL1S)

Unauthorized #10406 (SL1/SL1S)

Unknown printer model #10323 (SL1/SL1S)

Internal memory full #10516 (SL1/SL1S)

Fan RPM not in range #10122 (SL1/SL1S)

USB drive not detected #10528 (SL1/SL1S)

Tilt endstop not reached #10115 (SL1/SL1S)

Ambient temperature too cold #10703 (SL1/SL1S)

UV intensity too low #10318 (SL1/SL1S)

Speaker test failed #10310 (SL1/SL1S)

Resin too high #10109 (SL1/SL1S)

Wrong printer model #10544 (SL1/SL1S)

Still have questions?