If you want to build your own Cyloidal drive, let https://www.pcbway.com take care of the machining.

This was one heck of a project, but I made it in the end. A (nearly) zero-backlash 4th axis for my home made milling machine.

If you want to follow the projects a little closer, head over to   / notanengineer  .

@InheritanceMachining had to build a bigger box of shame because of me, go watch that NOW:    • Making a dovetail box... like a machi...  



Sources:

@HowToMechatronics - What is Cycloidal Drive? Designing, 3D Printing and Testing    • What is Cycloidal Drive? Designing, 3...  

@LeviJanssen - Has a lot of great videos on cycloidal drives

@jamesbruton - also has a lot of great videos on cycloidal drives

the best look inside a real cycloidal drive I could find: @arduinoversusevil2025 (AvE) - BOLTR: SUMITOMO CYCLO GEARBOX | Zero Backlash!    • BOLTR: SUMITOMO CYCLO GEARBOX | Zero ...  

Cycloidal Drive Parametric Equations - https://blogs.solidworks.com/teacher/...

Fusion Script I modified: https://capolight.wordpress.com/2018/...

My modified version for drawing epitrochoids: https://pastebin.com/05iDZssp

@ROBRENZ's large bore laps:    • MAKING AND USING LARGE DIAMETER LAPS  

Solid toolpost mount inspired by @StefanGotteswinter