Minitron is a project to transform your Prusa Mini into an upside-down CoreXY 3D printer. The project is split into two parts, the software and hardware. This page covers the hardware and assembly of the Minitron printer. The software of the printer is covered in the Github repository.

BOM (Bill of Materials)

• PTFE tube
• 1 x LM8UU linear bearing
• GT2 Idlers with a 6mm belt width and a 3mm bore
• GT2 belt with a width of 6mm
• Extension cable for extruder motor

Optional for those who want Klipper/Mainsail

• Raspberry Pi
• Raspberry Pi Camera Module (Not necessary for Mainsail but recommended)

Optional mods (absolutely not necessary!!!)

• Dual Gear Drive Extruder (Feel free to use the stock extruder)
• Raspberry Pi Mount

Print Instructions

All parts can be printed in PLA except for the files “Toolhead Top.stl” and “Toolhead Bottom.stl”. These parts should be printed in PETG which is more temperature resistant.

All files are printed with the standard “0.20mm SPEED” preset in Prusa Slicer.

Build instruction

TODO. For now check out the Onshape document to see the placement of parts as well as which screws to use. The belt configuration is a standard CoreXY belt configuration. The tricky part is on the M section in the illustration where the belts switch heights.

I hope that the CAD document is enough to help you build this printer. Let me know if explicit instructions are necessary.

Firmware Installation

Firmware installation is covered in the Github repository.