Prusa i3 MK3

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Prusa i3 MK3s+
Stock image of Prusa i3 MK3
Technical Specifications
Build Volume 250 x 210 x 200 mm
Filament Types PLA, ABS
Filament Sizes 1.75mm
X/Y Resolution 0.01 mm
Z Resolution ~0.01 mm
Nozzle Diameter 0.4 mm
Max Nozzle Temperature 300° C
Heated Bed Yes
Max Bed Temperature 100° C
Additional Information
User Manual
Website Prusa i3 MK3 Store Page


These printers have a number of advanced features that make them easier to use:

  • Filament sensor to detect material depletion
  • Automatic bed leveling
  • Head crash detection

Access Policy

See 3D_Printing#Machine_Access_Policy for access policy.


See 3D Printing#Workflow for general workflow information.


Before Printing

In order for prints to adhere properly the bed must be clean. Wipe it down with isopropyl alcohol (NOT acetone!) before a print to ensure that the bed is free of oils and dust. There are some special cases for bed preparation depending on the material used. Certain materials can damage the bed surface if not used properly. Check this chart for more info: . This will show you which bed is best for the material that you are using. Always check that the correct bed type is selected on the LCD menu before starting your print. Using the wrong setting can damage the bed or prevent proper adhesion.

See this link for more information on bed preparation:

Filament Change

  • Press the click wheel once for menu
  • Select preheat and choose the appropriate material
  • Once heated, press the click wheel for menu
  • Scroll down and choose 'Unload Filament'
  • Remove filament immediately
  • Insert new material and it should automatically load
    • If it doesn't load automatically, select 'Autoload Filament' or 'Load Filament' from the menu and follow prompts

Print Removal


Lift the spring steel sheet off of the bed by the front corners. Gently flex the bed in both directions until the print loosens enough to be removed.


This printer was purchased using a combination of membership dues and targeted donations. Thanks to everyone who donated!