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      Prusa i3 Bear Upgrade

      This is an aluminum frame conversion for the Prusa i3 MK2/MK2s/MK2.5.

      Josef PRŮŠA has created numerous of incredible 3D printers and its Prusa i3 MK2/MK2s/MK2.5 is capable of very impressive print quality for a very low price. A huge thanks to him and its team!

      Unfortunately, the frame is the weakest point of the machine. It is very difficult to square, it is not rigid enough on the Z axis and finaly the frame might move a bit when you do some maintenance. A very good project has solved those problems by using 3030 extrusion aluminum : Prusa 3030 Haribo Edition.

      So why another conversion build?
      • To reduce the number of parts to update from Prusa i3 MK2/MK2s/MK2.5 kit (no need to print a new RAMBo cover nor change any cable, rods or firmware from the original Prusa i3 MK2/MK2s/MK2.5)
      • Use more aluminum and less printed parts to build the frame (3D printed parts can crack if tighten too strongly, they are less reliable, less precise and might cost more)
      • Use Openbuilds hardware:
        • To have a single high quality platform of multitude compatible hardware parts (extrusion, plates, brackets, low profile screws...)
        • Open source
        • Easy to square and build
        • Worldwide shipping plus several other shops selling these parts
        • Powerfull community
        • Easily customizable
      • Limited number of measurements needed during the build phase (and no need for a caliper bigger than 150mm)
      • Fully open source by providing STL files, STEP files and Autodesk Fusion 360 project file

      Images of the 1st idea








      Current status

      I will start the first build :)

      Next steps
      • doc (print configs, build)
      • cable clips
      • feet
      Here is a list of sources I used to build this project :
      Huge thanks to these projects, without them this project can not exist!

      Attached Files:

      Moag, p.builds and Anthony Bolgar like this.
    1. Build Author , Find all builds by pek
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    Build License:
    • GNU (GPL3+) General Public Licence