I have, for many years now, been fascinated by the mathematical complexity yet mechanical simplicity of the Cycloid Reducer drive. No sooner had I mentioned this to Art Fenerty and he added a Wizard to his free software Vexx for designing and creating the necessary parts to build a cycloid reducer.
I have started out by making a basic 5:1 reducer and it works beautifully. Obviously bearings would be needed for the shaft and the eccentric if was to run at any speed but hey-ho it’s all a learning experience for me.
Those interested can download Vexx from Art’s website here;
https://gear2motion.com/You may also want to look at Auggie (another free software from Art) and maybe, if you have an interest in clocks or other mechanisms, consider Gearotic Motion.
Tweakie.