MMU3

<p><strong>MK4 to MK4S upgrade <br /></strong></p>
<p>The current lead time is <strong>1-2 weeks </strong>for both xLCD versions.</p>
<table class="table" style="border-collapse: collapse; height: 330.828px; border-style: ridge; width: 100%;" border="1">
<tbody>
<tr style="height: 28.375px;">
<td style="width: 29.0798%; height: 28.375px; border-style: dotted; border-width: 1px; text-align: left;">Order week</td>
<td style="width: 29.2017%; height: 28.375px; border-style: dotted; border-width: 1px; text-align: left;">Order date</td>
<td style="width: 41.7185%; height: 28.375px; border-style: dotted; border-width: 1px; text-align: left;">Shipping estimate</td>
</tr>
<tr style="height: 33.25px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 33.25px;">Week 33</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 33.25px;">starts August 12, 2024</td>
<td style="width: 41.7185%; height: 33.25px; border-style: dotted; border-width: 1px; text-align: left;" rowspan="4">Already shipped</td>
</tr>
<tr style="height: 24.7344px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 24.7344px;">Week 34</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 24.7344px;">starts August 19, 2024</td>
</tr>
<tr style="height: 24.7344px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 24.7344px;">Week 35</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 24.7344px;">starts August 26, 2024</td>
</tr>
<tr style="height: 24.7344px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 24.7344px;">Week 36</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 24.7344px;">starts September 2, 2024</td>
</tr>
<tr style="height: 27px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 27px;">Week 37</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 27px;">starts September 9, 2024</td>
<td style="width: 41.7185%; height: 101.203px; border-style: dotted; border-width: 1px; text-align: left;" rowspan="7">Currently shipping</td>
</tr>
<tr style="height: 30px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 30px;">Week 38</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 30px;">starts September 16, 2024</td>
</tr>
<tr style="height: 27px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 27px;">Week 39</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 27px;">starts September 23, 2024</td>
</tr>
<tr style="height: 27px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 27px;">Week 40</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 27px;">starts September 30, 2024</td>
</tr>
<tr style="height: 21px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">Week 41</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">starts October 7, 2024</td>
</tr>
<tr style="height: 21px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">Week 42</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">starts October 14, 2024</td>
</tr>
<tr style="height: 21px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">Week 43</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">starts October 21, 2024</td>
</tr>
<tr style="height: 21px;">
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">Week 44</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left; height: 21px;">starts October 28, 2024</td>
<td style="width: 41.7185%; border-style: dotted; border-width: 1px; text-align: left;" rowspan="4">From week 48 (starts November 25, 2024)</td>
</tr>
<tr>
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left;">Week 45</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left;">starts November 4, 2024</td>
</tr>
<tr>
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left;">Week 46</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left;">starts November 11, 2024</td>
</tr>
<tr>
<td style="width: 29.0798%; border-style: dotted; border-width: 1px; text-align: left;">Week 47</td>
<td style="width: 29.2017%; border-style: dotted; border-width: 1px; text-align: left;">starts November 18, 2024</td>
</tr>
</tbody>
</table>
<p></p>
<p> </p>
<h3><span style="font-size: 20px;">Current lead time estimates for new orders</span></h3>
<p><span style="color: #e67e23;"><strong>Updated: November 18th, 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>If you've ordered a product in a bundle, the lead time of the order is set based on the product in the bundle with the longest lead time.</p>
<p> </p>
<p></p>
<table class="table" style="border-collapse: collapse; height: 765.922px; border-style: ridge; width: 100%;" border="1">
<tbody>
<tr style="height: 27.922px;">
<td style="height: 27.922px; width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<h4>Product</h4>
</td>
<td style="height: 27.922px; 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 XL Enclosure<br /></strong><em>(standalone)</em><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 style="height: 72px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>Advanced Filtration System <br /></strong>(for Original Prusa Enclosure)</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>MK4 to MK4S upgrade<br /></strong>/MK4S upgrade for versions with old xLCD</p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>1-2 weeks</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>MK3.9 to MK3.9S upgrade</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: 51px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>MK3S/+ to MK4S upgrade</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>1-2 weeks</strong></p>
</td>
</tr>
<tr>
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center;">
<p><strong>MK3S/+ to MK3.9S 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 style="height: 51px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>MK3S/+ to MK3.5S upgrade</strong></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 style="height: 72px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>Original Prusa MMU3 upgrade kit (for MK4S/MK3.9S)</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>1-2 weeks</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 assembled unit (for MK4S/MK3.9S) </strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>1-2 weeks</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 assembled unit (for MK4/MK3.9)</strong></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 style="height: 51px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>MMU3 assembled unit (for MK3.5S/MK3.5) </strong></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 style="height: 51px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 51px;">
<p><strong>MMU3 assembled unit (for MK3S+) </strong></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 style="height: 72px;">
<td style="width: 48.3436%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>Original Prusa MMU2S to MMU3 upgrade<br />for MK4S/MK3.9S</strong></p>
</td>
<td style="width: 51.6564%; border-style: dotted; border-width: 1px; text-align: center; height: 72px;">
<p><strong>1-2 weeks</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

<p>The First Layer Calibration is used to calibrate the distance between the tip of the nozzle and the print surface. The aim is to adjust the nozzle height until the extruded plastic sticks nicely to the bed and you can see that it is being slightly squished.</p>
<p>The printers assembled in the Prusa factory are already fine-tuned and this calibration is needed only in case you build the kit version at home or change the nozzle. The First Layer Calibration is part of the Wizard (last step of the XYZ-Calibration). You can also recalibrate the first layer later on from the <em>LCD-menu - Calibration - First Layer Calibration</em>. During this process, rotate the knob to manually adjust the distance between the nozzle and the bed, while the printer is printing a zig-zag pattern.</p>
<div class="warning-callout">As <strong>each type of sheet (smooth, satin, and textured) has a different thickness</strong> you must use a different First layer calibration for each of them. For this, we have a convenient feature called <a href="http://help.prusa3d.com/article/steel-sheet-profiles_1955">Steel sheet profiles</a>.</div>
<p>With a newly assembled printer, you will start at zero and move into a negative (-) value, reducing the distance between nozzle and heat bed. The initial zero-value is set by the P.I.N.D.A./SuperPINDA. position. <strong>Turn the knob counter-clockwise to bring the nozzle closer to the bed and moving the value away from zero. </strong>The value is unique to each printer and it may also slightly change with time and use. You must, therefore, <strong>check visually when adjusting the height, not by a set value. </strong></p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/first_layer-768x433-1.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/first_layer-768x433-1-600x338.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/first_layer-768x433-1-300x169.jpg 300w" alt="" width="600" height="338" loading="lazy" /></p>
<p>The first layer calibration being set incorrectly can lead to various issues. With the nozzle too far from the print surface, you risk your print not sticking properly, which can result in a <a href="http://help.prusa3d.com/article/extruder-blob_2005">blob</a>. On the other side, if set too close, you can experience extrusion problems and <a href="http://help.prusa3d.com/article/clogged-nozzle-hotend-mk3-5-s-mk3s-mk2-5s_2008">clogging</a> and poor print quality, <strong>or even damage to the hardware, like the <a href="http://help.prusa3d.com/article/flexible-steel-sheets-guidepost_2195">Flexible steel sheet</a> due to the print sticking too much.</strong> It is therefore <strong>important to get this right.</strong></p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-01.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-01-300x62.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-01-600x125.jpg 600w" width="600" height="125" loading="lazy" data-hd-align="center" /></p>
<p>Before you proceed, make sure that the print surface (satin, smooth, or textured steel-sheet) is clean. You can find information on how to clean it in <a href="http://help.prusa3d.com/article/first-layer-issues_1804">PEI print surface preparation</a>. There are some small differences between how it should look on the textured and smooth steel sheet. We will, therefore, present pictures and guidelines for both, starting with the smooth sheet.</p>
<div>
<div class="note-callout" style="text-align: center;"><strong>Turn the knob counter-clockwise to bring the nozzle closer to the bed.</strong></div>
</div>
<h3>Smooth sheet</h3>
<h4>Too high</h4>
<p><strong>You want the line flattened, but not squished.</strong> On the square at the end of the test line, you do not want any <strong>gaps between the lines (<span style="color: #e03e2d;">left picture</span>), which means it is too high. </strong>In that case, the value will be too close to zero</p>
<h4>Too low</h4>
<p>If the nozzle is set too low (<span style="color: #e03e2d;">right picture</span>) you will see the line squished completely flat and the end square will have <strong>ridges between the lines, which is a clear sign it is set too low</strong> and the value will be too far away from zero. When it is too low, the edges of the square can also start curling upwards. In the extreme, the filament will be spread so thin you will be able to see through the printed filament, leading to clogging of your hotend.</p>
<div class="warning-callout">Having the nozzle too low can cause the nozzle to damage your steel sheet. This is not covered by <a href="http://help.prusa3d.com/article/warranty_2288">Warranty</a>.</div>
<h4>Just right</h4>
<p>A correct adjustment will show you an even surface (<span style="color: #2dc26b;">center picture</span>), with no gaps between lines, nor ridges. As stated, the numeric value depends on the exact position of the P.I.N.D.A./SuperPINDA sensor, which will be unique to each machine and means nothing without a visual reference. <strong>However, a common range is from -0.400 to -1.500.</strong></p>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-02.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-02-300x119.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-02-600x238.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-02-768x305.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-02-800x318.jpg 800w" /></p>
<div class="note-callout">Adjusting it closer can in some cases improve adhesion. However, if you are having problems with adhesion, but your first layer calibration looks like the 'good' picture (<span style="color: #2dc26b;">center picture</span>), your problem lies somewhere else, like a dirty/greasy sheet, print-settings, bed leveling/XYZ calibration, or under-extrusion.</div>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-03fix-2.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-03fix-2-600x214.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-03fix-2-800x286.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-03fix-2-300x107.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-03fix-2-768x274.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-03fix-2-1536x548.jpg 1536w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-03fix-2-2048x731.jpg 2048w" alt="" width="1121" height="400" loading="lazy" /></p>
<div class="warning-callout"><strong>You can not use the same first layer calibration if you swap between the Smooth and the textured sheet! </strong>For more information, please see <a href="http://help.prusa3d.com/article/steel-sheet-profiles_1955">Steel sheet profiles</a>.</div>
<h3>Textured sheet</h3>
<p>The textured sheets are thinner than the sheets with smooth PEI, therefore you need to move the nozzle bit closer, but you are seeking the same results as with the smooth sheet. Again, if <strong>it is set too low (<span style="color: #e03e2d;">right picture</span>) the filament can start curling up</strong> around the edges like it is not adhering. The numeric value will be too far from zero and must be adjusted back.</p>
<p>If set too high, you will see the line being round, and have gaps between the lines of the end-square. In this case, the value is too close to zero.</p>
<p><img decoding="async" title="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-04-300x119.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-04-600x238.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-04-768x305.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-04-800x318.jpg 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-04.jpg" /></p>
<h3>Have a look at the nozzle</h3>
<p>A single layer is about 0.2 mm / 0.00787402 inch. Having a look at the nozzle and its distance to the sheet can also be helpful. However, measuring the printed layer with calipers is not a recommended method to calibrate the first layer.</p>
<p><img decoding="async" title="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-05-300x119.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-05-600x238.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-05-768x305.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-05-800x318.jpg 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/First-Layer-Calibration-05.jpg" /></p>
<h3>When to run the First layer calibration</h3>
<p>Generally, the <strong>first layer calibration</strong> should be performed every time there is a <strong>major change in the assembly.</strong> This includes changing the nozzle, extruder upgrades, or other updates to any axis. You should also run all calibrations if you move the printer to a different location.</p>
<div class="tip-callout">For First Layer Calibrations with other nozzle diameters than 0.4 mm, please see <a href="http://help.prusa3d.com/article/different-nozzle-types_2193#first-layer-calibration-of-other-nozzles">this article</a></div>
<h3>Other issues</h3>
<ul>
<li>If the width of the line varies across its length, you may have to do some <a href="http://help.prusa3d.com/article/bed-level-correction_2267">Bed Level Correction</a>.</li>
<li>If the nozzle comes in contact with the bed, the SuperPINDA/P.I.N.D.A. leveling sensor is not being triggered by the flexible steel sheet and must be physically moved lower in its holder. This will bring it closer to the level of the nozzle tip. You should make sure it is adjusted as instructed in the <a href="http://help.prusa3d.com/guide/9-preflight-check_76792">Preflight check</a> in the Assembly manual. <strong>If you move the leveling sensor you must redo the First layer calibration.</strong></li>
</ul>

First Layer Calibration (i3)

<div><strong><img decoding="async" loading="lazy" style="float: right;" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-768x768.jpg 768w" alt="" width="225" height="225"></strong></div>
<h3>Basic info</h3>
<div><strong>PETG</strong> is one of the most easily printable materials, it is <strong>inexpensive and suitable for beginners</strong>. Relatively high tenacity and temperature resistance make it <strong>suitable for printing technical parts</strong> (for example parts of our printers).</div>
<div>&nbsp;</div>
<div><strong>Recommended nozzle temperature:</strong> 230 °C for the first layer, 240 °C for the other layers</div>
<div>&nbsp;</div>
<div><strong>Recommended bed temperature:</strong> 85 °C for the first layer, 90 °C for the other layers</div>
<div>&nbsp;</div>
<div><strong>Heatbed:</strong> Using powder-coated TXT or satin sheet is highly recommended. Printing on smooth PEI surface might damage the sheet.</div>
<h3>Description</h3>
<div>
<p><a href="https://www.prusa3d.com/category/prusament-petg/"><strong data-stringify-type="bold">PETG</strong></a> (Polyethylene Terephthalate modified with Glycol) is a commonly used technical material, popular among 3D printer users for its <strong>low price and good printability</strong>. It’s tenacious, with good temperature resistance; PETG is most commonly used for printing various mechanical parts, holders, clamps, and waterproof parts (thanks to great layer adhesion).</p>
<p>PETG has a glossy surface, adheres greatly to a print sheet, and <strong>does not shrink or warp</strong> (it has very little thermal expansion), therefore it’s suitable for printing large models. Plus, its high tenacity and flexibility often <strong>prevent it from breaking.</strong> Due to good temperature resistance, PETG parts are suitable both for interior and most exterior use (with temperatures below 80 °C). <strong>Parts of our printers are made of PETG!</strong></p>
<p>The letter G in PETG means that it’s modified with glycol during the manufacturing process. Glycol makes PET less brittle, easier to print, and more transparent for translucent prints. Of course, you can print also with PET filaments without glycol. However, printing with only PET is challenging and does not offer any advantage whatsoever.</p>
<div class="warning-callout">Even though PETG in itself may be considered <a href="http://help.prusa3d.com/article/food-safe-fdm-printing_112313">food-safe</a>, it consists of layers, as every 3D print, in which bacteria can grow over time. You can prevent this by applying a <strong>food-safe(epoxy) coating.</strong> Also, a stainless-steel nozzle should be used for if food is the intended application.</div>
<p>Although <strong>PETG</strong> is frequently used in <strong>food industry</strong> and is considered <strong>food-safe</strong>, we do not recommend it (or any other filament) for printing dishes or other stuff that comes into direct contact with food. The main reason is tiny print layer surface grooves that can support numerous bacterial colonies. But if you still want 3D printed dishes, we suggest <strong>applying a special layer</strong> that seals the surface (food-safe coating) and printing with a clean steel nozzle.</p>
<p>Some of the manufacturers <strong>enrich PETG with various additives</strong> and sell these materials under different names. For example, Spoolworks EDGE by E3D is modified PET/Copolyester Blend with additives. The goal is to acquire better visual qualities, surface and layer adhesion, etc.</p>
<p>To compare supported material properties, see our <a href="https://help.prusa3d.com/en/materials">material table.</a></p>
</div>
<table class="striped">
<tbody>
<tr>
<th>
<p>Pros</p>
</th>
<th>
<p>Cons</p>
</th>
</tr>
<tr>
<td>
<p>✔ Easy to print</p>
</td>
<td>
<p>✖ Possibility of stringing</p>
</td>
</tr>
<tr>
<td>
<p>✔ Good layer adhesion</p>
</td>
<td>
<p>✖ Poor bridging and overhangs</p>
</td>
</tr>
<tr>
<td>
<p>✔ Tough and durable</p>
</td>
<td>
<p>✖ Not great for printing detailed parts</p>
</td>
</tr>
<tr>
<td>
<p>✔ Low warping</p>
</td>
<td>
<p>✖ Bonds strongly to the print surface</p>
</td>
</tr>
<tr>
<td>✔ High temperature-resistance</td>
<td>
<p>✖ Soluble in dangerous chemicals</p>
</td>
</tr>
<tr>
<td>✔ Water and humidity resistant</td>
<td>
<p>✖ Supports are hard to remove</p>
</td>
</tr>
</tbody>
</table>
<h3>Best use</h3>
<p>PETG is used universally but is especially suitable for mechanical parts for both indoor and outdoor use. We use PETG to print parts for our printers! Plastic bottles are also made from this kind of material.</p>
<h3>Tips for successful printing</h3>
<p><strong>Temperature settings and cooling</strong></p>
<p>Unlike PLA, <strong>PETG requires a heated bed (85 °C).</strong> Its bridging- and overhang-behavior is usually worse, plus it is prone to stringing. Stringing can be moderated with higher retractions and lower nozzle temperature, but we suggest <strong>using the PrusaSlicer profiles that should work fine.</strong> It’s important to <strong>cool the PETG print</strong> - this helps to keep the model detailed and prevents stringing and oozing. But if you want the model to be as tough as possible, try to turn off the print fan. Higher filament temperature improves merging between layers which leads to better mechanical resistance. Otherwise, we recommend printing the first few layers with the print fan off to prevent deformation, then with the fan running at half its power.</p>
<div class="warning-callout"><strong>Do not print on the smooth PEI sheet</strong> as the adhesion may be too strong!</div>
<p><strong>Print surface preparation</strong></p>
<p>Make sure the print surface is clean, as described in <a href="http://help.prusa3d.com/article/first-layer-issues_1804">our dedicated article</a>. It is advisable to use one of the <strong>powder-coated print sheets. Do not print on the smooth PEI sheet</strong> as the adhesion may be too strong! If you decide to use the smooth PEI sheet anyway, apply a glue stick on it before printing.</p>
<p><strong>Adding more perimeters for more solid parts</strong></p>
<p>If you want to print truly solid parts, <strong>try to increase the number of perimeters</strong> instead of adding more infill.</p>
<h3>Postprocessing</h3>
<p>PETG can be easily sanded both dry and wet.</p>
<p><strong>Dissolving PETG</strong></p>
<p><strong>Dissolving and smoothing PETG</strong> is possible only in a laboratory by skilled lab workers using <strong>dangerous chemicals</strong> (Dichloromethane).</p>
<h3>Sample prints</h3>
<table style="border-collapse: collapse; width: 100%; height: 954px;" border="0">
<tbody>
<tr style="height: 300px;">
<td style="width: 48.805%; height: 300px;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-1-1.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-1-1-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-1-1-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-1-1-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-1-1-768x768.jpg 768w" alt="" width="800" height="800"></td>
<td style="width: 48.805%; height: 300px;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-jet-black-1kg.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-jet-black-1kg-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-jet-black-1kg-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-jet-black-1kg-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-jet-black-1kg-768x768.jpg 768w" alt="" width="800" height="800"></td>
</tr>
<tr style="height: 18px;">
<td style="width: 48.805%; height: 18px; text-align: center;"><em>MMU (Multi-Material Unit)</em></td>
<td style="width: 48.805%; height: 18px; text-align: center;"><em>Electronics cover and other printer parts</em></td>
</tr>
<tr style="height: 300px;">
<td style="width: 48.805%; height: 300px;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-2.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-2-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-2-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-2-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-2-768x768.jpg 768w" alt="" width="800" height="800"></td>
<td style="width: 48.805%; height: 300px;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-3.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-3-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-3-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-3-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-prusa-orange-1kg-3-768x768.jpg 768w" alt="" width="800" height="800"></td>
</tr>
<tr style="height: 18px;">
<td style="width: 48.805%; height: 18px; text-align: center;"><em>Ukulele</em></td>
<td style="width: 48.805%; height: 18px; text-align: center;"><em>Various mechanical parts</em></td>
</tr>
<tr style="height: 300px;">
<td style="width: 48.805%; height: 300px; text-align: center;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-1.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-1-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-1-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-1-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-1-768x768.jpg 768w" alt="" width="800" height="800"></td>
<td style="width: 48.805%; height: 300px; text-align: center;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/prusament-petg-urban-grey-1kg-768x768.jpg 768w" alt="" width="800" height="800"></td>
</tr>
<tr style="height: 18px;">
<td style="width: 48.805%; height: 18px; text-align: center;"><em>Electronic parts</em></td>
<td style="width: 48.805%; height: 18px; text-align: center;"><em>Boxes and organizers</em></td>
</tr>
</tbody>
</table>


PETG

<p></p>
<p>A 'cold pull' is a technique that allows you to clean your printer’s nozzle and hotend from any material that may be stuck or burnt inside. You can also use it to clean your hotend during your usual maintenance routine.</p>
<div class="warning-callout">If you are using Nozzle X, <strong>do not</strong> use the cold-pull method, but only use cleaning filament.</div>
<p>The cold pull should be made if your nozzle is only partially clogged, and some filament is still being extruded. If the nozzle is completely clogged, please check the <a href="http://help.prusa3d.com/article/clogged-nozzle-hotend-mk3-5-s-mk3s-mk2-5s_2008">Clogged nozzle guide</a>.</p>
<div class="tip-callout">Our testing has found that <strong>PLA works best for a cold pull,</strong> as other filaments do not retain the tip as PLA does and they will either tear or melt too much. However, there are filaments specifically made for cleaning hotends.</div>
<h3>Procedure</h3>
<ol>
<li>Go to the <em>LCD Menu -&gt; Settings -&gt; Temperature -&gt; Nozzle</em> (MK2.5/S, MK3/S/+) / <em>LCD Menu -&gt; Control -&gt; Temperature -&gt; Nozzle </em>(MK3.5/S), and set the temperature to 270 °C.</li>
<li>While waiting for the nozzle to reach the temperature, toggle the <strong>Filament autoload</strong> off in the <em>LCD Menu -&gt; Settings -&gt; Fil. sensor -&gt; F. autoload </em>(MK2.5/S, MK3/S/+) / <em>LCD Menu -&gt; Settings -&gt; Filament sensor </em>(MK3.5/S).</li>
<li>Still being in the <em>Menu</em>, go to <em>Settings</em> and choose <em>Disable steppers </em>(MK2.5/S, MK3/S/+). On MK3.5/S, navigate to <em>Control -&gt; Disable motors</em>. <br /><em>There is no message of the steppers being disabled, but you may hear an electrical hiss disappear when selected. <strong>If you can move the bed or extruder on its axis by hand, they are disabled.</strong></em></li>
<li>Open the Extruder Idler door. <em>Unscrew the screws circled below using a 2.5 mm Allen key. On the MMU2S and MMU3, unscrew the Bowden PTFE tube that connects the MMU unit with the extruder.</em></li>
</ol>
<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/idler2.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/idler2-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/idler2-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/idler2-768x768.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/idler2-600x600.jpg 600w" alt="" width="400" height="399" loading="lazy" /></td>
<td style="width: 48.9057%;"><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/mmus2.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/mmus2-300x216.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/mmus2-554x400.jpg 554w, https://cdn.help.prusa3d.com/wp-content/uploads/mmus2-768x554.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/mmus2-800x577.jpg 800w" alt="mmu" width="400" height="290" loading="lazy" /></td>
</tr>
</tbody>
</table>
<ol start="5">
<li>Once it has reached 270 °C, insert PLA filament manually into the extruder and push it in until it starts pouring out of the nozzle.</li>
<li>Stop heating by pressing <em>Cooldown</em> in the <em>LCD Menu -&gt; Preheat</em> (scroll all the way down), or by pressing the reset (X) button. Let the nozzle temperature drop to room temperature. To speed up the cooling you can engage the print fan at full speed, from<em> LCD menu -&gt; Settings/Control -&gt; Temperatures -&gt; Fan speed -&gt; [255].</em></li>
<li>Continue manually pushing the filament down until the temperature is too low for it to melt and come out (around 170 °C for PLA). <em>The nozzle has to be filled for the cold pull to be successful.</em></li>
<li>Pick away extruded material so there is nothing obstructing the pull later on.</li>
<li>After the nozzle cools down to the room temperature, go again to the <em>LCD Menu -&gt; Settings/Control -&gt; Temperature -&gt; Nozzle</em> and set the temperature to 85 °C.</li>
<li><strong>As soon as the extruder reaches this temperature</strong>, grab the filament with pliers and pull it slowly but steadily out of the extruder. <em>The filament can break inside. Make sure to pull straight upwards, not sideways. Hold the extruder with your other hand.</em></li>
<li>Don't stop until the filament is completely pulled out from the extruder.</li>
</ol>
<h3>Results</h3>
<p>On the tip of the filament that has been pulled out, you may see remnants of the previous material(s) you have been using or some burnt dirt that has settled in the nozzle (left picture). You might want to repeat this procedure several times until the filament comes out clean.</p>
<p>The right picture shows what a clean cold-pulled filament should look like. It is important to have the imprint of the nozzle on it, this way you are sure the nozzle was filled and nothing was left inside. Also, the color is not mixed with the one you have been using previously or have dark marks on it.</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/dirty-cold-pull.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/dirty-cold-pull-300x214.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/dirty-cold-pull-561x400.jpg 561w, https://cdn.help.prusa3d.com/wp-content/uploads/dirty-cold-pull-768x548.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/dirty-cold-pull-800x571.jpg 800w" alt="dirty cold pull" width="400" height="286" loading="lazy" /></td>
<td style="width: 48.9057%;"><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/clean-cold-pull.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/clean-cold-pull-300x203.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/clean-cold-pull-591x400.jpg 591w, https://cdn.help.prusa3d.com/wp-content/uploads/clean-cold-pull-768x520.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/clean-cold-pull-800x542.jpg 800w" alt="clean cold pull" width="693" height="469" loading="lazy" /></td>
</tr>
</tbody>
</table>
<h3>After the procedure</h3>
<p>Secure the idler door by having <strong>the head of the idler screw</strong>, on the left of the extruder, <strong>about flush with the plastic parts, when the filament is not loaded.</strong> Then we recommend running the Z calibration as pushing on the extruder might have thrown it off balance. Also, turn the filament sensor/filament autoload back on.<br />On MK2.5/S and MK3/S/+, the Z-axis calibration is found in <em>LCD menu -&gt; Calibration -&gt; Calibrate Z</em>).<br />On MK3.5/S, the Z-axis calibration is found in <em>LCD menu -&gt; Control -&gt; Calibrations &amp; tests -&gt; 3. Z alignment calibration</em>.</p>
<div class="note-callout">Please see <a href="http://help.prusa3d.com/article/under-extrusion_2007">this article</a> to learn about the most common causes leading to filament extrusion problems and how to prevent them from happening.</div>

Cold pull (MK3/S/+, MK2.5/S, MK3.5/S)

Prusa firmware-specific G-code commands

Original Prusa Enclosure assembly

Original Prusa MMU3 Assembly

Original Prusa Enclosure assembly (external display mounting)

Original Prusa MK4S with MMU3 (assembled)

Original Prusa MK3S+ MMU3 to MK4/MK3.9 MMU3 upgrade

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

Printer maintenance

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

Using the printer

Print Quality Troubleshooting

QR Error codes

Printer troubleshooting

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

Troubleshooting

About PrusaSlicer

Configuration and profiles

User interface

Top toolbar

Filament settings

Advanced features

Multi-material slicing

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

PrusaSlicer

1. Introduction

1. Preparation

2. MMU3 Unit upgrade

2. MMU2S Disassembly (UPG)

2. Cassete Buffer Assembly

3. MMU2S Buffer Disassembly (UPG)

3. Spool Holder Assembly

3. Buffer upgrade

4. Idler Body Assembly

4. Preparing the assembly

5. Selector Assembly

5. Preflight check

6. Pulley Body Assembly

7. Cassette Buffer Assembly

8. Spool holder Assembly

9A. MK4/S, MK3.9/S Nextruder mod

9B. MK3S+ / MK3.5 Extruder mod (KIT)

9C. MK3S+ Extruder (UPG)

10A. MK4/S, MK3.9/S Setup and Calibration

6A. Hinged Lid with MMU3

6B. Hinged lid with MMU2S

10B. MK3S+ Setup and Calibration

10C. MK3.5 Setup and Calibration

11. First Flight

<h3>Smart wipe tower</h3>
<p>The smart wipe tower ensures <strong>sharp color transitions</strong> and <strong>stable filament flow</strong> after a color change while aiming to waste as little filament as possible. There is always only one wipe tower no matter how many objects are being printed at once.</p>
<p>The wipe tower size is not dependent on the size of the object being printed but on the amount of color changes. Printing multiple copies at once or printing big objects improves the overall efficiency of the filament used.</p>
<div class="note-callout">If the <strong>wipe tower</strong> is being used at the same time as <a href="http://help.prusa3d.com/article/support-material_1698">print supports</a>, the extruder for the supports cannot be changed unless the support style is Organic. Changing the support extruder with any other support style than Organic will disable the <strong>wipe tower</strong>.</div>
<h4>Wipe tower placement</h4>
<p>As soon as you select a multi-material printer in the Printer selection box, the smart wipe tower will appear in the 3D view. The preview shows its maximum footprint, because the size may decrease after slicing, based on the number of color changes in each layer. The size will decrease from the edge with the polyline. You can change the placement of the wipe tower by dragging it with the left mouse button. Make sure the wipe tower doesn’t intersect any of the objects.</p>
<p>To shorten the travel moves between the object and the wipe tower, place it near the object/objects.</p>
<div><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_size.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_size-300x103.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_size-600x206.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_size-768x264.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_size-800x275.jpg 800w" alt="" /></div>
<div style="text-align: center;"><em>The real size of the wipe tower is visible in the G-code preview</em></div>
<h4>Wipe tower size</h4>
<p>In <strong>Print settings - Multiple Extruders - Wipe tower</strong> you can set the <strong>Width</strong> of the wipe tower. The other dimension is calculated automatically based on the amount of filament necessary to purge.</p>
<p>The purge amount can be set by clicking on the <strong>Purging volumes...</strong> button in the right panel.</p>
<p>The wipe tower is rarely solid. Instead, the ratio of sparse and dense infill is automatically adjusted every layer, based on the current number of color changes, in order to waste as little filament as possible.</p>
<p><strong>Wipe tower ramming line</strong></p>
<p>If you see a line in the air above the Wipe tower, that's <strong>normal</strong>. It's the visualization of the final extruder ramming before it unloads the last used filament (in order to create a sharp tip).</p>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_purge_line.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_purge_line-600x392.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_purge_line-800x522.png 800w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_purge_line-300x196.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_tower_purge_line-768x501.png 768w" alt="" /></p>
<h3>Wipe tower without sparse layers</h3>
<p>The wipe tower size can be reduced by skipping the sparse layers (layers without a tool change). This saves material and in almost all cases reduces the print time.</p>
<ol>
<li>Go to <strong>Print settings - Multiple extruders</strong></li>
<li>Tick <strong>No sparse layers (EXPERIMENTAL)</strong></li>
</ol>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/sparse_layers.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/sparse_layers-300x152.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/sparse_layers-600x305.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/sparse_layers-768x390.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/sparse_layers-800x406.jpg 800w" alt="" /></p>
<p>On our set of multi-material projects, this feature reduced the total print time by 3.16%, and the filament deposited on the wipe tower was reduced by 16.17%.</p>
<p>The wipe tower without sparse layers feature is very useful together with <a href="http://help.prusa3d.com/article/colorprint-with-the-mmu_124861">ColorPrint with the MMU</a>. Only a handful of filament switches are needed to print a colored sign unattended and as a result, a lot of material is saved compared to a full wipe tower.</p>
<p>As PrusaSlicer currently does not check for collisions of the extruder with the printed object when lowering down to the top of the wipe tower, this feature is marked as experimental, and it is recommended to place the wipe tower to the rear right corner of the MK3S's print bed, while the object is placed to the opposite corner.</p>
<div>
<div class="warning-callout"><strong>Turn off Crash detection</strong> if you're using a wipe tower without sparse layers. Otherwise, you're risking a potential collision between the x-axis and the printed object during crash recovery.</div>
</div>
<h3>Wipe to infill</h3>
<p>Since the inside of the model isn’t visible, it can be used to wipe the nozzle during the color transition. The wipe tower cannot be eliminated completely, because some models do not have enough infill, but wipe to infill can <strong>greatly reduce the amount of wasted material</strong>.</p>
<ol>
<li><strong>Right-click</strong> on a model in the 3D view.</li>
<li>Choose <strong>Wipe options</strong>.</li>
<li>Then in the right panel tick <strong>Wipe into this object’s infill</strong>.</li>
</ol>
<div class="note-callout">Dark filament purged into infill may be visible through light-colored walls. To avoid this issue, we suggest increasing the number of perimeters.</div>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_to_infill_crop.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_to_infill_crop-300x165.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_to_infill_crop-600x329.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_to_infill_crop-768x421.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_to_infill_crop-800x439.jpg 800w" alt="" /></p>
<h3>Wipe object</h3>
<p>To further decrease the amount of material used for the smart wipe tower, you can choose to wipe residual filament into an object. The so-called ‘wipe object’ will be used during the color transition to wipe the nozzle. As a result, the colors of the object will be mixed - this is handy in case you don’t care about the surface color (e.g. mechanical parts).</p>
<ol>
<li><strong>Right-click</strong> on a model in the 3D view</li>
<li>Choose <strong>Wipe options</strong>.</li>
<li>Then in the right panel tick <strong>Wipe into this object</strong></li>
</ol>
<p><strong>Wipe object taller than the multi-colored object</strong><br />The wipe object will be finished with the last filament used during the multi-colored print.</p>
<p><strong>Multi-colored object taller than the wipe object</strong><br />After the wipe object is finished printing, wiping will move to the smart wipe tower.</p>
<div class="note-callout">During a color change, the flow isn't perfectly stable. For example, a tiny amount of air can get trapped in the nozzle as the new melted material pushes from the top. As a result, slight artifacts can appear on your wipe object.</div>
<p style="text-align: center;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_object.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/wipe_object-300x169.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_object-600x338.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_object-768x433.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/wipe_object-800x451.jpg 800w" alt="" /><em>The footprint of the wipe tower is minimal thanks to the wipe object (gear)</em></p>
<h3>Stabilizing cone</h3>
<p>The wipe tower can optionally be printed with a “stabilization cone”, which prevents it from toppling over. This feature is especially useful when the wipe/priming tower is very small in footprint, but can reach great heights, as on the Original Prusa XL.</p>
<p>The apex angle of the cone is adjustable in Print Settings-Multiple Extruders-Wipe tower. Setting the value to zero disables the cone.</p>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2023/07/d2e0a0e519e15f32289d5f722f488733.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="Wipe tower" alt="" width="2011" height="1220" loading="lazy" /></p>


Wipe tower

<p>Preparing models for multi-material FDM prints used to be a fairly complicated and time-consuming process. Starting with PrusaSlicer 2.4, coloring an object for multi-material printing requires just a handful of bucket fills and brushstroke operations.</p>
<h3>Painting tools</h3>
<p><img decoding="async" loading="lazy" style="float: left;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/toolbox.png" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/toolbox-470x400.png 470w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/toolbox-706x600.png 706w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/toolbox-300x255.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/toolbox-768x653.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/toolbox.png 1600w" alt="" width="370" height="315"></p>
<p><strong>Brush</strong></p>
<p>Similar to the support or seam painting tool. Hold down your left-mouse button to paint with the primary color, the right mouse button to paint with the secondary color.</p>
<p><strong>Smart fill</strong></p>
<p>With the Smart fill tool selected, as you hover the mouse above the model, you get a real-time preview of the automatically detected region to paint. The paint fills a region below the mouse cursor up to a sharp edge, with the threshold angle adjustable. &nbsp;</p>
<p><strong>Bucket fill</strong></p>
<p>Replace a patch of one color with another.</p>
<p><strong>Video showcase</strong></p>
<div class="embed-container" style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%;"><iframe style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;" src="https://www.youtube.com/embed/MQx6O8TA77o?start=8" frameborder="0" allowfullscreen="allowfullscreen"></iframe></div>
<h3>Color selection</h3>
<p>The combo boxes <strong>First color</strong> and <strong>Second color</strong> in the panel allow mapping different extruders to the left and right mouse buttons. The number and color of the selected extruder are shown for clarity. The color that is used for visualization can be overridden by clicking the colored square next to the selected extruder. This visualization color is not saved anywhere and will be lost when the application closes.</p>
<h3>Segmenting colors</h3>
<p>During slicing, the painted regions are cleverly extended inwards, giving the different colors/polymers the best chance of binding together.</p>
<p>The object surface is segmented into patches of the same material and the patches are extended inwards. The regions painted at the top resp. bottom surfaces are extended by the number of top_solid_layers resp. bottom_solid_layers (configurable in Print Settings - Layers and Perimeters). The regions painted at the side walls are expanded inwards up to maximum mmu_segmented_region_max_width (which is a new configuration parameter accessible in Print Settings-&gt;Multiple Extruders-&gt;Advanced).</p>
<p>The painting only affects the slicing result, the model itself is not altered and the colored "parts" cannot be exported separately.</p>
<h3>Notes</h3>
<p>Please note that thin features are not printable with FDM technology, thus for example painting a thin wall with two distinct colors will not make the thin wall printable. Such thin non-printable regions created during segmentation are thus detected and merged with the neighboring region, changing its color. PrusaSlicer will print thinner features with "detect thin walls" enabled, thus it is advised to try to enable "detect thin walls" if painting over thin features.</p>
<p>There are two extra limitations arising from technical reasons:</p>
<p>The multi-material painting is limited to 16 extruders. If your printer uses more extruders, only the first 16 will be available in the painting tool.</p>
<p>Multi-material painting cannot be combined with XY size compensation. The XY size compensation will be ignored during slicing if the object is also multi-material painted. The user is informed by notification in both cases.</p>
<h3>Examples of painted models</h3>
<p><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide-600x265.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide-800x353.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide-300x133.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide-768x339.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide-1536x678.jpg 1536w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide-2048x905.jpg 2048w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/01/mmu_prints-copy_wide.jpg 1600w" alt="" width="1847" height="816"></p>


Multi material painting

<p>During a filament change, a small amount of melted plastic remains in the nozzle. As the new filament is loaded, it’s melted as well and starts pushing the nozzle content out. During this time, you’ll see a gradual change in the color of the extruded filament.</p>
<p>In order to ensure a sharp color transition, PrusaSlicer provides several ways to deposit this filament:</p>
<ul>
<li><a href="http://help.prusa3d.com/article/wipe-tower_125010#smart-wipe-tower">Smart wipe tower</a></li>
<li><a href="http://help.prusa3d.com/article/wipe-tower_125010#wipe-to-infill">Wipe to infill</a></li>
<li><a href="http://help.prusa3d.com/article/wipe-tower_125010#wipe-object">Wipe to object</a></li>
</ul>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/bad_wipe.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/bad_wipe-300x130.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/bad_wipe-600x260.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/bad_wipe-768x332.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/bad_wipe-800x346.jpg 800w" alt="" /></p>
<p style="text-align: center;"><em>The sheep on the right has the white color contaminated by the blue pigment from the previous filament</em></p>
<h3>Purging volumes </h3>
<p>Two modes are possible to set the purging volumes. <strong>Use values from configuration</strong>, or <strong>use custom project-specific settings</strong>. </p>
<h4>Use values from configuration</h4>
<p>The volume to purge is set by changing the <span style="color: #e67e23;"><strong>Purging Volume</strong></span> in <em>Printer Settings -&gt; Single extruder MM setup</em>. This value can be further modified on the filament level using <span style="color: #236fa1;"><strong>Purge Volume Multiplier</strong></span> in <em>Filament Settings -&gt; Advanced</em>. The values cannot be modified in the purging volumes matrix. </p>
<table style="border-collapse: collapse; width: 100%; border-style: none;" border="1">
<tbody>
<tr>
<td style="width: 48.8562%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2024/06/f4d94896d8d8651d26e1db4787558958_painted.jpeg" sizes="(min-width: 1024px) 820px, 100vw" srcset="Purging volumes REVIEW (MMU)" alt="" width="395" height="395" loading="lazy" /></td>
<td style="width: 48.8562%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2024/06/84eaeae79c549dba160932e40ee2bd91_painted.jpeg" sizes="(min-width: 1024px) 820px, 100vw" srcset="Purging volumes REVIEW (MMU)" alt="" width="395" height="389" loading="lazy" /></td>
</tr>
</tbody>
</table>
<h4>Use custom project-specific settings</h4>
<p>Clicking on the purging volumes settings opens a new window that contains a matrix. Each cell represents the amount of filament required to purge during filament change from filament X (left column) to filament Y (top row).</p>
<p>By selecting <strong>use custom project-specific settings</strong>, you can set each matrix cell individually. The values from the configuration are not used in this mode. </p>
<table style="border-collapse: collapse; width: 100%; border-style: none;" border="1">
<tbody>
<tr>
<td style="width: 48.8562%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2024/06/404dd67de9a52d8effd183ffa299c611.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="Purging volumes REVIEW" alt="" width="395" height="369" loading="lazy" /></td>
<td style="width: 48.8562%;"><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/2024/06/8fff99a356f33f681c7d1baef8a18dfa.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="Purging volumes REVIEW" alt="" width="395" height="367" loading="lazy" /></td>
</tr>
</tbody>
</table>
<h4>Example values</h4>
<table style="border-collapse: collapse; width: 33.3744%; height: 54px;">
<tbody>
<tr style="height: 18px;">
<td style="width: 10.1806%; height: 18px;"> </td>
<td style="width: 12.7668%; height: 18px;"><strong>unload</strong></td>
<td style="width: 13.1353%; height: 18px;"><strong>load</strong></td>
</tr>
<tr style="height: 18px;">
<td style="width: 10.1806%; height: 18px;"><strong>Black</strong></td>
<td style="width: 12.7668%; height: 18px;">80</td>
<td style="width: 13.1353%; height: 18px;">30</td>
</tr>
<tr style="height: 18px;">
<td style="width: 10.1806%; height: 18px;"><strong>White</strong></td>
<td style="width: 12.7668%; height: 18px;">20</td>
<td style="width: 13.1353%; height: 18px;">70</td>
</tr>
</tbody>
</table>
<p><span style="font-weight: 400;">Transition <strong>Black</strong> to <strong>White</strong> = Black unload + White load = <strong>80 + 70 = 150 mm³</strong></span></p>
<p><span style="font-weight: 400;">Transition <strong>White</strong> to <strong>Black</strong> = White unload + Black load = <strong>20 + 30 = 50 mm³</strong></span></p>
<div class="tip-callout">Transitioning from black to white requires more purging volume than transitioning from white to black, due to a <strong>higher color contamination from a darker to a lighter color</strong>. </div>
<p>When using a soluble filament to print supports, or filaments with additives (highly glossy, glitter, etc.), increased purging volumes are most likely needed, compared to the standard example values. </p>


Purging volumes (MMU)

<p>PrusaSlicer supports the following scenarios:</p>
<ol>
<li>
<p><strong>Single material printer</strong> (or MMU2 in Single extruder mode).<br />
In this case, color-changes (manual filament swaps) can be added, but not extruder-changes.</p>
</li>
<li>
<p><strong>Multi-material printer with the same extruder assigned to all objects</strong>, to their volumes and to modifier meshes.<br />
Color-changes (manual filament swaps) for an arbitrary extruder and automatic tool changes of an active extruder to another extruder can be added.</p>
</li>
<li>
<p><strong>Multi-material printer, where more than one extruder is assigned to objects</strong>, to their volumes or to modifier meshes.<br />
Only color-changes can be added. Extruder-changes are already defined by extruder assignments on the Plater and we do not allow them to be extended or overridden by ColorPrint.<br />
While in theory, it could be possible to combine extruder-changes of Plater with the extruder-changes of the ColorPrint, the result would be difficult to interpret by the user, so we decided to keep it simple.</p>
</li>
</ol>
<div class="note-callout">It is possible to edit any Color Print action after it is created (right-click), the layer slider has to be exactly on the layer you wish to edit.</div>
<div class="warning-callout">
<p><strong>Prohibited cases</strong></p>
<p>When color/extruder-changes are added and later made invalid by switching a printer profile or changing extruder assignments at the Plater (going from scenario 2 to 3 above or vice versa), the invalid color/extruder changes are marked with an <strong>exclamation mark</strong> to alert the user.</p>
<p>Any such color/extruder change will be <strong>ignored</strong> during the G-code export. Further manipulation with the ColorPrint slider is blocked before these conflicts are resolved by the user.</p>
</div>
<h3>Examples</h3>
<h4>Automatic layer-based color change (ColorPrint - scenario 2)</h4>
<p>Imagine this as a normal color change with the single-extruder printer. Each layer can have only one color at the same time. But rather than switching the color manually, you can pick which extruder to use next.&nbsp;</p>
<p>Move the layer preview slider to desired color change height, click on the orange plus icon and select <strong>Change extruder</strong>.</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/mmu_color_print.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print-300x152.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print-600x305.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print-768x390.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print-800x406.jpg 800w" alt="" width="649" height="329"></p>
<div class="tip-callout">If you enable <strong>Print settings - Multiple Extruders - No sparse layers</strong> each color change will add only one layer to the wipe tower.</div>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print_example.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print_example-300x164.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print_example-600x328.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print_example-768x420.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/mmu_color_print_example-800x438.jpg 800w" alt=""></p>
<h4>Printing with more than 5 colors at once with the MMU2S (scenario 3)</h4>
<p>Let's say that you have a multi-material print with all 5 filaments already in use. However, you wish to use one more color by manually changing the filament in of the of the mmu slots.</p>
<p>Simply move the layer preview slider to desired color change height, click on the orange plus icon and select for which extruder you wish to add the color change. All extruders used in the current layer will be marked.</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/more_than_5_colors_setup.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors_setup-300x161.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors_setup-600x323.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors_setup-768x413.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors_setup-800x430.jpg 800w" alt="" width="596" height="320"></p>
<p>The resulting model with 8 colors used in total:</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/more_than_5_colors.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors-300x158.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors-600x317.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors-768x405.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/more_than_5_colors-800x422.jpg 800w" alt="" width="725" height="382"></p>
<p>The action that's prohibited in this example is creating a layer-based color change by assigning a different extruder to a half of one part. E.g. the roof can be dual-colored (red/pink), but this color change can has to be done only manually. If you wish to make the change automatically by assigning different extruder, split the model into two separate models.</p>
<p>&nbsp;</p>
<p>&nbsp;</p>


ColorPrint with the MMU

<h3>Assigning tool heads/colors/extruders to different features</h3>
<p>You can assign different print features to be printed with a different tool in the <strong>Print Settings - Multiple Extruders</strong> menu.</p>
<p>You can set a different tool for:</p>
<ul>
<li>Perimeters</li>
<li>Infill</li>
<li>Solid infill</li>
<li>Support material</li>
<li>Support material interface layers</li>
<li>Wipe tower’s external perimeters</li>
</ul>
<p><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2023/07/d666dd976cf20db6a247327d985b1608.png" sizes="(min-width: 1024px) 820px, 100vw" srcset="Assigning colors (extruders)" alt="" width="2011" height="773" /></p>
<h3>Assigning tool heads/colors/extruders to different models or parts of a model</h3>
<h4>Painted models</h4>
<p>If you've used the <a href="http://help.prusa3d.com/article/multi-material-painting_262620">Painting tool</a> to mark parts of the object to be printed with a different tool, you can assign the tools there directly.</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/2022/01/toolbox.png" sizes="(min-width: 1024px) 820px, 100vw" srcset="Assigning colors (extruders)" alt="" width="444" height="378" /></p>
<h4>Models with separate shells</h4>
<p>If your model imported correctly (<a href="http://help.prusa3d.com/article/importing-multi-material-model_121191"><strong>Importing MMU model</a>)</strong> you'll see each part in the object list on the right side. If you don't see the object list, switch to the <strong><span class="tooltip" data-tooltip="124819">Advanced or Expert mode</span></strong>.</p>
<p>You can assign a color (extruder) to a part by <strong>double-clicking on the colored rectangle</strong> in the Object list. You can also simply press a number key, e.g. "3" to assign the extruder to the selected model.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder-300x172.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder-600x344.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder-768x440.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder-800x459.jpg 800w" alt="" width="547" height="314" loading="lazy" /></p>
<p>Alternatively, you can select a part in the object list, <strong>right-click</strong> on it in the 3D view and select <strong>Change extruder - Extruder [number]</strong> from the context menu.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder2.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder2-300x180.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder2-600x360.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder2-768x461.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/picking_extruder2-800x480.jpg 800w" alt="" width="582" height="349" loading="lazy" /></p>
<h3>Changing the preview color</h3>
<p>Changing the color of the individual "extruders" has no actual effect on the print, but it's a nice way to visualize it and it can help you select the right filament colors. You can change the color assigned to an extruder by clicking on the <strong>color box</strong> next to the profile name in the Filament profile selection.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/preview_color.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/preview_color-300x136.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/preview_color-600x272.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/preview_color-768x348.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/preview_color-800x362.jpg 800w" alt="" width="733" height="332" loading="lazy" /></p>


Assigning tools / colors  / extruders

<h3>Importing multiple STL files as a single multi-material model</h3>
<p>First of all,&nbsp;<strong>switch the printer preset to a Multi Material printer</strong> (such as the MMU2S), otherwise, the following steps won't work.</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/printer_selection_mmu.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/printer_selection_mmu-300x199.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/printer_selection_mmu-600x397.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/printer_selection_mmu-768x508.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/printer_selection_mmu-800x530.png 800w" alt="" width="436" height="289"></p>
<p>Then you can either:</p>
<ol>
<li><strong>Drag and drop all of the STL files at once</strong> into the 3D view</li>
<li>Select <strong>File - Import - and select all STL files at once</strong></li>
<li>Select <strong>Add...</strong> <span class="key">Ctrl</span> + <span class="key">I</span> from the top toolbar <strong>and select all STL files at once</strong></li>
</ol>
<p>PrusaSlicer will ask you if it should represent the loaded models as one single object with multiple parts - confirm the prompt by selecting <strong>Yes</strong>.&nbsp;</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/multiple_part_object_detected.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/multiple_part_object_detected-300x117.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/multiple_part_object_detected-600x235.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/multiple_part_object_detected-768x301.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/multiple_part_object_detected-800x313.png 800w" alt="" width="442" height="173"></p>
<h3>Importing single STL or OBJ file as a single Multi Material model</h3>
<p>The STL file format doesn't support multiple objects in a single file natively. However, it's not uncommon for multiple separate models/shell to be in a single STL anyway. PrusaSlicer will load such models as a single object. If you wish to split the objects into multiple parts, use the <a href="http://help.prusa3d.com/article/split-to-objects-parts_1751"><strong>Split to parts</strong></a> function in the top toolbar.</p>
<h3>Importing 3MF as Multi Material model</h3>
<p>3MF files natively support multiple objects in a single file, Multi Material models should be automatically recognized and loaded correctly. Saving a project file (File-Save) is the ideal way of storing and sharing Multi Material models for Prusa printers.</p>


Importing Multi Material model

<p>PrusaSlicer lets you define a repeating pattern of color changes. You can access this feature by <strong>clicking the gear icon</strong> in the bottom right corner of the <strong>preview screen</strong>.</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/extruder_sequence.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/extruder_sequence-300x191.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/extruder_sequence-600x382.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/extruder_sequence-768x489.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/extruder_sequence-800x510.jpg 800w" alt="" width="552" height="352">The color change interval can be defined either in layers or in millimeters - which can be useful when you’re using the <strong><span class="tooltip" data-tooltip="124810">Variable layer height</span></strong>&nbsp;function.</p>
<p>To <strong>remove</strong> all of the color changes use the <strong>reset button <img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/reset_icon-1.png" alt="" width="17" height="19"></strong> located in the bottom right corner of the preview screen.</p>
<div class="tip-callout">You can repeat the same color (extruder) in the sequence several times.</div>
<p><img decoding="async" loading="lazy" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/stripes.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/stripes-300x211.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/stripes-570x400.jpg 570w, https://cdn.help.prusa3d.com/wp-content/uploads/stripes-768x539.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/stripes-800x561.jpg 800w" alt="" width="643" height="451"></p>
<div>&nbsp;</div>


Patterns - set extruder sequence


<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>Initial release for Original Prusa MMU3</li>
</ul>



<ul>
<li>MMU3 firmware support</li>



<li>Features by the Prusa community
<ul>
<li>E3D Revo support</li>



<li>Meatpack support</li>



<li>Do not preheat the heatbed on load/unload</li>



<li>Features and translations</li>
</ul>
</li>



<li>Support for G-Code M850</li>



<li>First Layer Calibration - nozzle diameter</li>



<li>PrusaLink improvements</li>



<li>Build environment with cmake</li>



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


3.13.0 (3.0.0)


<ul>
<li>XYZ calibration fixed</li>
</ul>


3.13.1 (3.0.0)


<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> Updated with instructions for MK3.5</li>
</ul>


1.01


<ul>
<li>Initial release for the Original Prusa MK3.5</li>



<li>Bundle includes firmware for printers and the MMU3 unit</li>
</ul>



<p></p>


MK3.5 5.2.1 (3.0.2), MK3S+ 3.13.1 (3.0.0)


<ul>
<li>Updated with instructions for MK4</li>
</ul>


1.02


<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>


2.7.4


<ul>
<li>Touch support </li>



<li>Stuck filament detection </li>



<li>Stealth mode </li>



<li>MMU3 support for the MK4/MK3.9</li>



<li>MMU3 firmware auto-update </li>



<li>Cold Pull </li>



<li>Time Zone settings updated </li>
</ul>


6.0.0 (3.0.3) MK4, MK3.9


<ul>
<li>Touch support</li>



<li>Stealth mode</li>



<li>MMU3 support for the MK3.5</li>



<li>MMU3 firmware auto-update</li>



<li>Time Zone settings updated</li>



<li>Bed Level Correction</li>
</ul>


6.0.0 (3.0.3) MK3.5


<ul>
<li>Improvements by the Prusa community</li>



<li>Bug fixes</li>



<li>Known issues</li>



<li>MK3S+ firmware remains at 3.13.3</li>
</ul>


3.13.3 (3.0.2) MK3S+


<ul>
<li>Japanese language support (MK4, MK3.9, MK3.5, XL)</li>



<li>Stealth mode corrected (MK4, MK3.9, MK3.5, XL)</li>
</ul>


6.0.1 (3.0.3) MK3.5


<ul>
<li>Japanese language support (MK4, MK3.9, MK3.5, XL)</li>



<li>Nozzle cleaning repaired (MK4, MK3.9, XL)</li>



<li>Acceleration limit restored (MK4, MK3.9, MINI)</li>



<li>Stealth mode corrected (MK4, MK3.9, MK3.5, XL)</li>
</ul>


6.0.1 (3.0.3) MK4, MK3.9


<ul>
<li>Improvements by Prusa community</li>
</ul>


6.0.2 (3.0.3) MK3.5

6.0.2 (3.0.3) MK4, MK3.9


<ul>
<li>Interim solution of USB disconnect issues (MK4, MK3.9, MK3.5, XL)</li>



<li>PINDA off-bed probing repaired (MK3.5)</li>
</ul>


6.0.3 (3.0.3) MK3.5


<ul>
<li>Interim solution of USB disconnect issues (MK4, MK3.9, MK3.5, XL)</li>
</ul>


6.0.3. (3.0.3) MK4, MK3.9


<ul>
<li>Prusa Connect integration</li>



<li>Prusa Account integration</li>



<li>Improved UI</li>



<li>Improved G-code Viewer</li>



<li>New system profile updating system</li>



<li>Single Perimeter for top and bottom layers</li>



<li>Extended SLA layer separation configuration</li>



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


2.8.0


<ul>
<li>PrusaLink and Prusa Connect updates</li>



<li>PowerPanic improvements</li>



<li>Mesh Bed Leveling (MBL) improvements</li>



<li>New / Improved G-codes</li>



<li>User Interface updates</li>



<li>Community features</li>



<li>Firmware development changes</li>
</ul>


3.14.0 (3.0.2) MK3S+

6.0.4 (3.0.3) MK3.5

6.0.4 (3.0.3) MK4, MK3.9


<ul>
<li>Support for MK3.9S and MK3.5S printers</li>



<li>Numeric keyboard</li>



<li>Custom names for steel sheet</li>



<li>User-configurable hostname</li>



<li>Binary G-code check</li>



<li>ESP firmware flash during boot (MINI, MK3.5/S, MK3.9/S, MK4/S)</li>



<li>New bootloader 2.3.5</li>



<li>Network Status screen</li>



<li>Steel sheet name in footer (MK3.5/S)</li>



<li>Powered Z-motors during calibration procedure (MK3.5/S, MK3.9/S, MK4/S)</li>



<li>Default nozzle diameter set to 0.4 (XL)</li>



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


6.1.2 (3.0.3) MK3.5S, MK3.5

6.1.2 (3.0.3) MK4S, MK4, MK3.9S, MK3.9


<ul>
<li>Improved menu bar, the menu no longer hides under a button</li>



<li>Two new parameters (Abrasive material and High flow nozzle) for G-Code checks</li>



<li>Improved automatic orientation of bridges</li>



<li>Number of bugfixes</li>
</ul>


2.8.1


<ul>
<li>Issues with numeric keyboard repaired (MK4/S, MK3.9/S, MK3.5/S, XL)</li>



<li>Returned nozzle diameter setup (XL)</li>



<li>Printhead position during calibrations changed (MK4/S, MK3.9/S, MK3.5/S)</li>



<li>Cold pull (XL)</li>
</ul>


6.1.3 (3.0.3) MK3.5S, MK3.5

6.1.3 (3.0.3) MK4S, MK4, MK3.9S, MK3.9

P.I.N.D.A. sensor

Thermistor

Filament sensor

M.I.N.D.A. sensor

MINI

Tube fitting

Print fan

USB port

Power Button

Liquid Resin

Curing / Solidifying

Lid (SL1)

Whole mechanical assembly of SL1 print platform

Tilt

Tank

Selector knob

Filament buffer

Wipe tower / Purge tower

Micro USB port

Reset button

Firmware

Long PTFE between an extruder motor and hotend

Bowden tube

Controller board

Blade

Hotend

Ethernet port (LAN)

Power switch

Extruder / Extruder motor

Nozzle

Print head

Extruder PTFE tube (bowden MINI)

LCD screen

Spool holder

SL1 file (*.sl1)

Print display (SL1)

Heatbed

Belt tension

Extruder

Flexible steel sheet

Chimney (IR-sensor-holder-MMU2S)

Control Buttons (MMU2S)

Indicator LEDs (MMU2S)

Selector motor (MMU2S)

Pulley motor (MMU2S)

Idler motor (MMU2S)

F.I.N.D.A. sensor (MMU2S)

Live Adjust Z

Filament tip

Tension Screws (MMU2S)

Idler screw

Print speed

Heater cartridge

Filament sensor introduced with the S-upgrade of MK3 and MMU2

IR filament sensor

Selector (MMU2S)

MMU idler (MMU2S)

Diameter of filament compatible with Original Prusa printers.

Original Prusa MMU3