Modular planetary gerabox 1024:1 (4:1, 16:1, 64:41, 256:1) for NEMA17 stepper motors
Design in FreeCAD
Final STL models for 3D printer and photo on https://www.thingiverse.com/thing:2586962
How to this working? See my video: https://youtu.be/6pDPNkWU2vo