TMC Driver Mount for Mige Style motor

TMC Driver Mount for Motor (OpenFFBoard)

A FreeCAD-designed mount and lid that integrates a TMC driver board (Yannik / OpenFFBoard) onto the back of a motor. Designed for a clean, compact install with no external bracket needed.

GitHub: https://github.com/AyrtonRicardo/mige-driver-at-bottom/tree/main/tmc%20driver

Currently the motor cable is indeed open, I've decided to keep them like this for now, update will follow at some point to cover it. You're welcome to update yourself.

Description

This mount attaches directly to the back of the motor and holds the TMC driver board in place, with a matching lid to fully enclose and protect the electronics. The lid also includes a 40x40mm hole so you can optionally mount a standard 40mm cooling fan for active cooling of the driver. Source FreeCAD files are included in the GitHub repo if you want to modify the design for your own motor or driver revision.

Files Included

• TMC motor mount.stl — main mount body

• TMC motor mount-TMC Lid.stl — enclosure lid

• TMC motor mount-tmc motor not so tall.stl — low-profile mount variant

• TMC motor mount-test_cable_dimensions.stl — test print for verifying cable clearance before committing to a full print

• Source .FCStd FreeCAD file available on GitHub for editing

Print Settings

• Material: PETG recommended (PLA also works, but PETG holds up better near a motor that generates heat)

• Layer height: 0.2 mm

• Infill: 20–30%

• Walls: 4 perimeters minimum for structural rigidity around mounting points

• Supports: Check orientation before printing — supports may be needed on overhangs around cable channels and screw bosses; the mount generally prints well without supports if oriented with its mounting face down

• Nozzle: Printed with a 0.4 mm nozzle, but feel free to use whatever nozzle size you're comfortable with

• Bed adhesion: Standard (brim optional for small contact area parts like the lid)

• Print orientation: Flat, mounting face down, for best strength and minimal supports

Tip: print the test_cable_dimensions file first to confirm cable clearance fits your specific driver and wiring before printing the full mount.

Hardware Needed

• Mounting screws matching your motor's mounting hardware (verify against your motor's back-plate hole pattern)

• M3 heat-set inserts, 4mm length x 5mm OD, brass, knurled, soldering-iron type (same spec used in Voron printer BOMs — e.g. McMaster-Carr P/N 94180A331) — for securing the lid to the mount

• M3 screws (length to match insert depth) — for securing the lid to the mount

• Optional: 40x40mm cooling fan + mounting screws (fits the fan hole in the lid)

Assembly

1. Print the mount and lid using the settings above.

2. Test-fit the test_cable_dimensions piece against your TMC driver and wiring.

3. Melt the M3 heat-set inserts into the mount's insert bosses using a soldering iron, going in straight and letting the plastic cool before releasing.

4. Mount the TMC driver board into the mount body.

5. Route cables through the provided channel.

6. Secure the lid over the mount using M3 screws into the heat-set inserts.

7. Attach the assembly to the back of the motor.

Credits

TMC driver board design by Yannik (OpenFFBoard).

License

Add your preferred license here (e.g. MIT, CC-BY-NC-SA) before publishing.