Cycloidal Gears need inside holes as well.

[iplayfast]

The problem with cycliodal gears is that you need all the parts that go with it.

You've done a fantastic job on it but without holes for the output shaft, and the pins for the output shaft it's hard for someone who doesn't know the math needed. (N holes, diameter of Pin + eccentric, positioned equal radius from origin).

I've been working on my own workbench to solve this, and after much trial, decided to make it on sketches, and building up the parts from scratch. This has been working great, as you can then add any modifications you want. (enlarge holes for bearings for example).

I've the math I'm using to create the drive is wrong, so I'm trying to use yours. I'm having problems mapping the cam = Face(Wire(wires)) to a sketch. I'm thinking a bSplineCurve would be best, but not having any luck.

If you get a chance please take a look at https://forum.freecadweb.org/viewtopic.php?f=22&t=67988

Thanks for your workbench. You've done a really good job.