<p>With our Original Prusa i3 MK3, we have introduced a brand new logic board called <strong>Einsy RAMBo</strong>. Compared to its predecessor, it works on 24V and uses Trinamic drivers for motors, allowing for super silent printing and much more.</p>
<h3>Electronics wiring</h3>
<p>Organizing all the cables can be a bit challenging, so we recommend you take your time. If there are any issues with your printer's wiring, they will be most likely discovered by the <a href="http://help.prusa3d.com/article/selftest-failed-mk3-mk3s-mk3s_2045">Selftest failed (MK3/MK3S/MK3S+)</a> or when running the initial <strong>Wizard.</strong> For more information <strong>about the cable-management</strong>, we recommend checking <a href="http://help.prusa3d.com/guide/8-electronics-assembly_174100">Electronics assembly</a> of the assembly manual.</p>
<div class="note-callout">Note, that the filament sensor is called the <strong>IR sensor</strong> on the MK3S. The position of its cable is still the same.</div>
<p><img decoding="async" src="https://cdn.help.prusa3d.com/wp-content/uploads/prusuki/prusuki-images/readings.jpeg"></p>
<div class="tip-callout">For more information about the fuses, check <a href="http://help.prusa3d.com/article/blown-fuse-mk3-mk3s-mk3s_1925">this article</a>.</div>
<div class="note-callout"><strong>Did you know, that...?<br /></strong>The RAMBo board is designed and built to sustain considerable heat. It does not need any cooling even if the printer is in an enclosure.</div>
<div class="hd--html">&nbsp;</div>


Einsy RAMBo electronics wiring (MK3/MK3S/MK3S+)

Zapojení elektroniky Einsy RAMBo (MK3/MK3S/MK3S+)

Einsy RAMBo-Elektronikverkabelung (MK3/MK3S/MK3S+)

Cableado de la placa Einsy RAMBo (MK3/MK3S/MK3S+)

Câblage de l'électronique de l'Einsy RAMBo MK3/MK3S/MK3S+)

Cablaggio elettronica Einsy RAMBo (MK3/MK3S/MK3S+)

Einsy RAMBo 制御ボードの配線(MK3/MK3S/MK3S+)

Podłączenie przewodów - Einsy RAMBo (MK3/MK3S/MK3S+)

Original Prusa Curing and Washing Machine (CW1S) is a recommended accessory for the Original Prusa SL1S

Original Prusa CW1 to CW1S platform upgrade

Original Prusa Enclosure assembly

Original Prusa XL - beta test

Original Prusa XL unpacking

The Original Prusa i3 MK3S+ is the successor of the award-winning Original Prusa i3 MK2S 3D printer.

Original Prusa i3 MK3S+ kit assembly

Original Prusa SL1 to SL1S SPEED upgrade

Original Prusa MINI+ kit assembly

The Original Prusa MINI+ is a compact 3D printer with all the bells and whistles you would expect from the creators of the award-winning Original Prusa i3 MK2 and MK3S!

Original Prusa MINI+ semi-assembled

Original Prusa i3 to MMU2S upgrade

Original Prusa i3 MK3/MK3S to MK3S+ upgrade

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

The Original Prusa i3 MK3S is the successor of the award-winning Original Prusa i3 MK3 3D printer.

Original Prusa i3 MK3S kit assembly

Original Prusa i3 MK1 to MK2 upgrade

Original Prusa i3 Plus 2.85 mm to 1.75 mm upgrade

Original Prusa i3 Plus 1.75 mm to MK2S upgrade

Original Prusa i3 Plus 1.75 mm kit assembly

Original Prusa i3 MK2 to MK2S upgrade

Original Prusa i3 MK2/S to MMU1 upgrade

The Original Prusa MINI/MINI+ is a compact 3D printer with all the bells and whistles you would expect from the creators of the award-winning Original Prusa i3 MK2 and MK3S!

Original Prusa MINI assembly

Original Prusa i3 MK2S is a successor to Original Prusa i3 MK2 with small hardware tweaks for easier assembly and improved reliability.

Original Prusa i3 MK2S kit assembly

Original Prusa i3 MK2 kit assembly

Original Prusa i3 MK2S to MK3 upgrade

The Original Prusa i3 MK3 is the successor of the award-winning Original Prusa i3 MK2 3D printer.

Original Prusa i3 MK3 kit assembly

Original Prusa i3 MK3 to MK3S upgrade

Original Prusa i3 MK2 MMU1 to MK2.5S MMU2S

Original Prusa i3 MK2 to MK3S upgrade

Original Prusa i3 MK3/MK2.5 to MMU2 v1.01

Original Prusa i3 MK2.5 to MK2.5S upgrade

Original Prusa i3 MK2 to MK2.5S upgrade

Assembly manuals

Basic calibration

Advanced 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

Prusa Connect & PrusaLink

Slicing

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

Nozzles

Octoprint

Printer simulator

Protective Shields

Learn about different nozzles, Raspberry Pi connection, Octoprint and more.

3rd party accessories & Other projects

About PrusaSlicer

Configuration and profiles

User interface

Input/output

Left toolbar

Top toolbar

Print settings

Filament settings

Printer settings

Advanced features

Multi-material slicing

SLA slicing

Other (PrusaSlicer)

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

PrusaSlicer

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.

1.75 mm

FFF/FDM

Filament

Bondtech gears

Hotend thermistor

Heatbed thermistor

Heat block

Modifier meshes

Support enforcers

Support blockers

Hollowing

Original Prusa MK3

Original Prusa MK3S

Original Prusa SL1

Original Prusa MMU2S

Touch screen

Check the cables

Tower / Z-Axis

UV led panel

Knob (SL1)

Connected to the printer and used with Octoprint

Raspberry Pi

Prusa Connect

Prusa Connect Local

SD card

USB drive

Test

test relation1122

Einsy

Original Prusa MK2.5

Original Prusa MK2.5S

Heatsink

Print platform

SuperPINDA

Mesh bed leveling

for securing PTFE in the MINI brass fitting

Olive

Buddy board

FEP foil

Tilt motor

Cantilever

Hotend fan

<p>The <a href="https://www.prusa3d.com/360viewer/">360 Viewer</a> is a virtual tool you can use to inspect all parts of the Prusa printers. <strong>Rotate, zoom, hide layers, explode</strong> the model, and click on <strong>individual objects</strong> to see their names and online store ID! This tool can assist with the assembly &amp; agreeing with our support team on a specific printer part for order/replacement.</p>
<table style="border-collapse: collapse; width: 100%; height: 619.334px;">
<tbody>
<tr style="height: 274.667px;">
<td style="width: 32.1943%; height: 274.667px; text-align: center;"><a href="https://autode.sk/3EgDif1" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/mk3s-2.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/mk3s-2-353x400.jpg 353w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/mk3s-2-529x600.jpg 529w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/mk3s-2-264x300.jpg 264w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/mk3s-2-768x871.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/mk3s-2.jpg 1600w" alt="" width="260" height="295"></a><strong>Original Prusa i3 MK3S+</strong></td>
<td style="width: 32.1943%; height: 274.667px;">
<p><a href="https://autode.sk/3G7hMK7" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/134adfae6022649b.png" alt="" width="250" height="261"></a></p>
<p style="text-align: center;"><strong>Original Prusa i3 MK3S</strong></p>
</td>
<td style="width: 32.1943%; height: 274.667px;">
<p><a href="https://autode.sk/3d98pgJ"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/3a6acd06f1f6e1d3.png" alt="" width="260" height="271"></a></p>
<p style="text-align: center;"><strong>Original Prusa i3 MK3</strong></p>
</td>
</tr>
<tr style="height: 326.267px;">
<td style="width: 32.1943%; height: 326.267px;">
<p><a href="https://autode.sk/3GbLAFF" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/f2955489593921d7_painted.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/f2955489593921d7_painted-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/f2955489593921d7_painted-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/f2955489593921d7_painted-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/f2955489593921d7_painted.jpg 1600w" alt="" width="260" height="260"></a></p>
<p style="text-align: center;"><strong>Original Prusa i3 MMU2S</strong></p>
</td>
<td style="width: 32.1943%; height: 326.267px;">
<p><a href="https://autode.sk/3xJZICS" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/d80844a254a18c6a.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/d80844a254a18c6a-400x400.jpg 400w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/d80844a254a18c6a-600x600.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/d80844a254a18c6a-300x300.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/d80844a254a18c6a-768x768.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/d80844a254a18c6a.jpg 1600w" alt="" width="260" height="260"></a></p>
<p style="text-align: center;"><strong>Original Prusa MINI+</strong></p>
</td>
<td style="width: 32.1943%; height: 326.267px;">
<p><a href="https://autode.sk/3pnSAbp" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/c4de54d40e5888b7.jpg" alt="" width="260" height="271"></a></p>
<p style="text-align: center;"><strong>Original Prusa MINI</strong></p>
</td>
</tr>
<tr style="height: 18.4px;">
<td style="width: 32.1943%; height: 18.4px;">
<p><a href="https://autode.sk/3po2p9k" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/07/SL1S_SPEED.png" alt="" width="254" height="265"></a></p>
<p style="text-align: center;"><strong>Original Prusa SL1S SPEED</strong></p>
</td>
<td style="width: 32.1943%; height: 18.4px;">
<p><a href="https://autode.sk/3Dd8Qkv" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/1779344531358d36.png" alt="" width="254" height="265"></a></p>
<p style="text-align: center;"><strong>Original Prusa SL1</strong></p>
</td>
<td style="width: 32.1943%; height: 18.4px;">
<p><a href="https://autode.sk/3ddnrli" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2021/11/cw1.jpeg" alt="" width="511" height="494"></a></p>
<p style="text-align: center;"><strong>Original Prusa CW1</strong></p>
</td>
</tr>
</tbody>
</table>
<h3>How to use Prusa 360 Viewer</h3>
<ul>
<li>To move, rotate or pan - use the buttons on the bottom of the page. You can also use the following keys:</li>
<li>Press and hold the left button on your mouse to activate the <strong>Orbit</strong>&nbsp;function.</li>
<li>Press and hold the Shift button to activate the&nbsp;<strong>Pan</strong>&nbsp;function.</li>
<li>Use scroll wheel to <strong>zoom in</strong>&nbsp;and&nbsp;<strong>zoom out</strong>.</li>
</ul>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/360vier1-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/360vier1-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/360vier1-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/360vier1-800x600.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/360vier1.png" data-hd-align="center"></p>
<div class="tip-callout">The entire model is designed according to the <a href="https://help.prusa3d.com/en/category/assembly-manuals_272">assembly manual</a>, therefore, you can easily access a specific part of the printer or learn which fasteners are used.</div>
<h3>Exploring the 360-model</h3>
<ul>
<li class="level-0">First, click on the&nbsp;<strong>Model browser</strong> to open a list of the printer's sections, those are listed according to the <a href="https://help.prusa3d.com/en/category/assembly-manuals_272">assembly manual</a>.</li>
<li>In case you want to isolate a specific section (e.g. the Extruder),&nbsp;<strong>click on the "eye"</strong>&nbsp;icon next to the section&nbsp;<strong>to make it invisible</strong>&nbsp;(grey). You can turn them back ON by clicking on them again.</li>
</ul>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://files.helpdocs.io/Sd0njU6Ihj/articles/26qoin8p5m/1578659975642/image.png" data-hd-align="center"></p>
<h3>Exploding the assembly into the parts</h3>
<p>You can 'explode' the entire printer or specific section into the basic parts. Let's learn how to achieve that.</p>
<ul>
<li class="level-0">Select the entire printer or section and click on the&nbsp;<strong>Explode button</strong>&nbsp;(see the bottom panel)</li>
<li>Using the slider define, the distance between exploded elements.&nbsp;<em>You can use this function to learn, which fastener goes to which hole.</em></li>
<li>To learn the name of the part, simply on click on it in the 3D view and click on the&nbsp;<strong>Properties</strong>&nbsp;button</li>
<li><strong>Extra feature:</strong> each part has its unique set of numbers for our warehouse and e-shop. Always the one starting "Pr_..."</li>
</ul>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" title="https://cdn.help.prusa3d.com/wp-content/uploads/360vier2-300x225.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/360vier2-533x400.png 533w, https://cdn.help.prusa3d.com/wp-content/uploads/360vier2-768x576.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/360vier2-800x600.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/360vier2.png" data-hd-align="center"></p>


360 viewer

<p>The components installed on your printer rely on firmware configuration. To facilitate the use of components sourced from third-party vendors, <strong>firmware version 3.9.1 introduced an "Experimental menu"</strong>. Because different hardware has different specifications, the firmware is now capable of adjusting the defining parameters of some components.</p>
<div class="warning-callout"><strong>The experimental menu is for advanced users.</strong> For a printer with stock parts, there are no changes to the firmware parameters, and no user interaction is needed.</div>
<table style="border-collapse: collapse; width: 100%;" border="0">
<tbody>
<tr>
<td style="width: 48.8232%;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-screen.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-screen-600x189.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-screen-800x252.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-screen-300x95.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-screen-768x242.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-screen.jpg 1600w" alt="" width="400" height="126"></td>
<td style="width: 48.9326%;"><img decoding="async" loading="lazy" src="https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-complete.jpg" sizes="(min-width: 1024px) 820px, 100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-complete-600x186.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-complete-800x248.jpg 800w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-complete-300x93.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-complete-768x238.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/2022/06/Experimental-menu-complete.jpg 1600w" alt="" width="400" height="124"></td>
</tr>
</tbody>
</table>
<p><strong>To activate the experimental menu, navigate to <em>LCD menu -&gt; Settings -&gt; HW Setup</em>, then scroll to any menu item and hold the knob for 2-3 seconds.</strong> After a “click” sound, the menu list will have a new option at the bottom, named '<em>Experimental'</em> (left picture).</p>
<p>Within '<em>Experimental'</em> you find the following options:</p>
<ul>
<li>“Altfan detection” (<em>Altfan det.</em>) [On/Off]</li>
<li>E-cool mode [On/Off]</li>
<li>Fake serial number</li>
</ul>
<h3>Altfan detection</h3>
<p><strong>This is an option if you are using an alternative fan to the Noctua hotend fan.</strong> The firmware is capable of adjusting the parameters of <a href="https://en.wikipedia.org/wiki/Pulse-width_modulation">pulse-width modulation (PWM)</a> for the hotend fan. This is a way to control electrical current, by taking the full voltage and current and turning it on and off very fast at a specific rate, instead of a steady flow of energy. Some fans will require a lower amount of power to run at optimal speed while others need a 100% flow of power.</p>
<p>For a printer with stock parts, there are no changes to the firmware parameters, and no user interaction is needed. When a printer is run for the first time after the assembly, or <a href="http://help.prusa3d.com/article/factory-reset-mk2s-mk2-5s-mk3s_2216">a full factory reset</a>, the firmware will automatically detect the fan and set the appropriate PWM value. This value is stored permanently in the EEPROM memory and remains even after a firmware update. It can be only deleted by performing a full factory reset.</p>
<p>For modded printers not using the stock fans, the user has to intervene only if the factory reset is performed, because the printer might not be able to set a correct PWM value for a given third party fan. By turning the Altfan detection off, the printer will run the fan at 100% power.</p>
<div class="note-callout">Setting a specific custom PWM value is currently not possible.</div>
<h3>E-cool mode</h3>
<p>Our developers have discovered that using StealthChop without the “current feedback” feature of the TMC2130 stepper drivers positively affects the extruder motor's temperature. <strong>Multiple tests on our farm have shown that the temperature can be lowered by up to 10° C.</strong> This configuration is called E-cool mode and <strong>will work in both <a href="http://help.prusa3d.com/article/power-modes_2213">Normal and Stealth power-mode</a>.</strong></p>
<div class="warning-callout"><strong>This feature was tested only for the motors provided by Prusa Research!</strong> We cannot guarantee that this current amplification can be applied to other 3rd party motors as they might get damaged due to a current spike. For this very reason, the feature is disabled for all printers and has to be manually enabled at the user's risk.</div>
<div>
<h3>Fake serial number</h3>
<p>From firmware version <strong>3.11.0</strong> a motherboard serial number check has been added. This is related to remote printing services like PrusaConnect/Link, Repetier, or Octoprint.</p>
<p>Einsy RAMBo boards that do not come from Prusa Research will not have a serial number burned in. This includes boards purchased directly from Ultimachine or 3rd party clone boards.</p>
<p>To pass a serial number check, this functionality will write a ‘fake’ serial number to the board’s EEPROM so it's not blank. Without it, you can run into a timeout issue when connecting to these services.</p>
<div class="warning-callout">Do not use this function if you are running a genuine Prusa Einsy board! It can affect the printer’s ability to use certain remote printing services.</div>
<p>If you activate this function unintentionally, you can perform a factory reset to load the original serial number to the Einsy EEPROM again.</p>
</div>


Experimental menu (MK3/S/+)

<div class="note-callout">This article describes the menu system <strong>BEFORE</strong> firmware 3.9.0 for the Original Prusa i3 MK3S.</div>
<p>Controlling the LCD screen is done by a single control element: a <strong>rotational knob</strong> that you <strong>press to confirm</strong> the selection. By single pressing the control button on the information screen, you enter the main menu.</p>
<p><img decoding="async" style="display: block; margin-left: auto; margin-right: auto;" src="https://files.helpdocs.io/Sd0njU6Ihj/articles/gq0gb99j3b/1579011629379/image.png" data-hd-align="center"></p>
<p>The reset button is placed directly under the control knob. Pressing the reset button equates to quickly toggling the power switch (hard reset). It is useful when the printer exhibits weird behavior or you see a failed print that requires immediate cancellation.</p>
<div class="tip-callout">Shortcut: Quick access to Move Z-axis function - While on the Info-screen, press and hold the Control knob for 3 seconds</div>
<p><img decoding="async" src="https://files.helpdocs.io/Sd0njU6Ihj/articles/gq0gb99j3b/1578664249526/image.png" alt="Main screen"></p>
<ol>
<li>Nozzle temperature (actual / desired temperature)</li>
<li>Heatbed temperature (actual / desired temperature)</li>
<li>Progress of printing in % - shown only during the printing</li>
<li>Status bar (Prusa i3 MK3S ready. / Heating / file_name.gcode, etc.)</li>
<li>Z-axis position</li>
<li>Printing speed</li>
<li>Remaining time estimation</li>
</ol>
<div class="tip-callout">Shortcut: Quick access to change Printing speed - While on the Info-screen, spin the knob either direction, more than one rotation, and see the percentage change.</div>
<h3>Hierarchy of the LCD-menu</h3>
<h4>- Info screen (Main info-screen)</h4>
<h4>- Live adjust Z (during the printing process only)</h4>
<h4>- Tune (during the printing process only)</h4>
<ul>
<li>Speed</li>
<li>Nozzle</li>
<li>Bed</li>
<li>Fan speed</li>
<li>Flow</li>
<li>Change filament</li>
<li>Mode</li>
</ul>
<p><strong>- Pause print (during the printing process only)</strong></p>
<p><strong>- Stop print (during the printing process only)</strong></p>
<h4>- Preheat</h4>
<ul>
<li>PLA - 215/60</li>
<li>PET - 230/85</li>
<li>ABS - 255/100</li>
<li>ASA - 260/105</li>
<li>HIPS - 220/100</li>
<li>PP - 254/100</li>
<li>FLEX - 230/50</li>
<li>Cooldown</li>
</ul>
<h4>- Print from SD</h4>
<h4>- Filament autoload (Load filament if Filament autoload is off)</h4>
<h4>- Unload filament</h4>
<h4>- Settings</h4>
<ul>
<li>Temperature
<ul>
<li>Nozzle</li>
<li>Bed</li>
<li>Fan speed</li>
</ul>
</li>
<li>Move axis
<ul>
<li>Move X</li>
<li>Move Y</li>
<li>Move Z</li>
<li>Extruder</li>
<li>Disable steppers</li>
</ul>
</li>
<li>Filament sensor - On / Off</li>
<li>F. autoload - On / Off / N/A</li>
<li>Fans check - On / Off</li>
<li>Mode - Normal / Stealth</li>
<li>Crash detection - On / Off</li>
<li>HW setup
<ul>
<li>Steel sheets</li>
<li>Nozzle d. - 0.25 / 0.40 / 0.60</li>
<li>Checks
<ul>
<li>Nozzle - warn / strict / none</li>
<li>Model - warn / strict / none</li>
<li>Firmware - warn / strict / none</li>
</ul>
</li>
</ul>
</li>
<li>Mesh bed leveling
<ul>
<li>Mesh 3x3 / 7x7</li>
<li>Z-probe nr. 1 / 3 / 5</li>
<li>Magnets comp. - On / Off</li>
</ul>
</li>
<li>Lin. correction</li>
<li>Temperature calibration - On / Off</li>
<li>RPi port - On / Off</li>
<li>Live adjust Z</li>
<li>Select language</li>
<li>SD card - Normal / FlashAir</li>
<li>Sort - Time / Alphabet / None</li>
<li>Sound - Loud / Once / Silent / Assist</li>
</ul>
<h4>- Calibration</h4>
<ul>
<li>Wizard</li>
<li>First layer calibration</li>
<li>Auto home</li>
<li>Selftest</li>
<li>Calibrate XYZ</li>
<li>Calibrate Z</li>
<li>Mesh Bed Leveling</li>
<li>Bed level correction</li>
<li>PID Calibration</li>
<li>Reset XYZ calibration</li>
<li>Temperature Calibration</li>
</ul>
<h4>- Statistics</h4>
<h4>- Fail stats</h4>
<ul>
<li>Last print</li>
<li>Total</li>
</ul>
<h4>- Support</h4>
<ul>
<li>Firmware version</li>
<li>XYZ calibration detail</li>
<li>Extruder info</li>
<li>Sensor info</li>
<li>Belt status</li>
<li>Temperatures</li>
<li>Voltages</li>
</ul>


LCD menu i3 (pre firmware 3.9.0)

<p style="box-sizing: inherit; margin-top: 0px; margin-bottom: 1rem; color: #373a3c; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; background-color: #fefeff;">Where your spools are located can make the difference between trouble and smooth operation of the printer. It is also often desirable to reduce the footprint of the printer as much as possible. Here are some pointers to where it is best to keep the spool and its holders according to our experience.</p>
<h3>MK2/S, MK2.5S, and MK3S/+:</h3>
<p style="box-sizing: inherit; margin-top: 0px; margin-bottom: 1rem; color: #373a3c; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; background-color: #fefeff;">The ideal location of the spool for the MK2/S and MK3/S is using the supplied spool-holder mounted on top of the printer. The frame will support several spools with ease.</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/MK3sshop.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/MK3sshop-246x300.jpg 246w, https://cdn.help.prusa3d.com/wp-content/uploads/MK3sshop-328x400.jpg 328w, https://cdn.help.prusa3d.com/wp-content/uploads/MK3sshop-768x937.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/MK3sshop-492x600.jpg 492w" alt="" width="424" height="517"></p>
<h4 style="box-sizing: inherit; margin-top: 1em; margin-bottom: 0.5rem; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-weight: 500; line-height: 1.1; color: #373a3c; font-size: 1.3rem; background-color: #fefeff;">MMU2S:</h4>
<p style="box-sizing: inherit; margin-top: 0px; margin-bottom: 1rem; color: #373a3c; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; background-color: #fefeff;">The MMU2S is supplied with different spool-holders than the MK2/S and MK3/S. It is a continuation of the spool holder design used for the first MMU. It has been tested through thousands of hours of printing and was proven functional.</p>
<p style="box-sizing: inherit; margin-top: 0px; margin-bottom: 1rem; color: #373a3c; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; background-color: #fefeff;">When the MMU unit is changing the filament, it unloads it from the orange/white PTFE tube situated between the extruder and the MMU unit, meaning that roughly 450 mm of filament is retracted. That is why it is recommended to arrange the spool holders at about 400 mm behind the printer (green line).</p>
<p><img decoding="async" style="box-sizing: inherit; border-style: none; vertical-align: middle; max-height: 400px; display: block; margin-left: auto; margin-right: auto; height: auto !important;" title="https://cdn.help.prusa3d.com/wp-content/uploads/image-1-300x203.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/image-1-591x400.png 591w, https://cdn.help.prusa3d.com/wp-content/uploads/image-1-768x520.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/image-1-800x541.png 800w" src="https://cdn.help.prusa3d.com/wp-content/uploads/image-1.png" data-hd-height="400px" data-hd-align="center"></p>
<p style="box-sizing: inherit; margin-top: 0px; margin-bottom: 1rem; color: #373a3c; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; background-color: #fefeff;">Our solution for dealing with retracted filament is a device called the filament buffer. The filament string creates a loop inside in order to prevent tangling. The setup requires a space of at least 70 × 100 cm.</p>
<p><img decoding="async" style="box-sizing: inherit; border-style: none; vertical-align: middle; max-height: 350px; display: block; margin-left: auto; margin-right: auto; height: 227px;" src="https://cdn.help.prusa3d.com/wp-content/uploads/image-2.png" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/image-2-300x191.png 300w, https://cdn.help.prusa3d.com/wp-content/uploads/image-2-600x383.png 600w, https://cdn.help.prusa3d.com/wp-content/uploads/image-2-768x490.png 768w, https://cdn.help.prusa3d.com/wp-content/uploads/image-2-800x510.png 800w" width="355" data-hd-height="350px" data-hd-align="center"> <img decoding="async" style="box-sizing: inherit; border-style: none; vertical-align: middle; max-height: 350px; display: block; margin-left: auto; margin-right: auto; height: 193px;" src="https://cdn.help.prusa3d.com/wp-content/uploads/final-setu.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/final-setu-300x165.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/final-setu-600x329.jpg 600w, https://cdn.help.prusa3d.com/wp-content/uploads/final-setu-768x421.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/final-setu-800x439.jpg 800w" width="352" data-hd-height="350px" data-hd-align="center"></p>
<div class="warning-callout" style="box-sizing: inherit; text-indent: -2.75em; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px;">On a tray-design spool-holder, make sure the filament is feeding out from below the spool. Having it pull filament from over the top can cause it to tip over when loading.</div>
<h4 style="box-sizing: inherit; margin-top: 1em; margin-bottom: 0.5rem; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-weight: 500; line-height: 1.1; color: #373a3c; font-size: 1.3rem; background-color: #fefeff;">MINI:</h4>
<p style="box-sizing: inherit; margin-top: 0px; margin-bottom: 1rem; color: #373a3c; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; background-color: #fefeff;">The ideal location for the spool with the Prusa MINI is right next to the LCD-screen. This creates the smallest footprint possible. If you have the space is also possible to have it sideways next to the printer, pointing towards the printer. Most important is that the filament does not bend at an acute angle.</p>
<p style="box-sizing: inherit; margin-top: 0px; margin-bottom: 1rem; color: #373a3c; font-family: Lato, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; background-color: #fefeff;">&nbsp;</p>
<p><img decoding="async" style="box-sizing: inherit; border-style: none; vertical-align: middle; max-height: 350px; display: block; margin-left: auto; margin-right: auto; height: auto !important;" src="https://cdn.help.prusa3d.com/wp-content/uploads/mini-w-spool.jpg" sizes="100vw" srcset="https://cdn.help.prusa3d.com/wp-content/uploads/mini-w-spool-300x221.jpg 300w, https://cdn.help.prusa3d.com/wp-content/uploads/mini-w-spool-543x400.jpg 543w, https://cdn.help.prusa3d.com/wp-content/uploads/mini-w-spool-768x566.jpg 768w, https://cdn.help.prusa3d.com/wp-content/uploads/mini-w-spool-800x589.jpg 800w" data-hd-height="350px" data-hd-align="center"></p>


Spool placement

Einsy RAMBo electronics wiring (MK3/MK3S/MK3S+)

Electronics wiring

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