So recently I’ve been fairly bored with a lack of FRC related things to do, as I’m sure many of you are. So after one rather late night of getting lost in a deep web of posts here, I stumbled upon this thread that I hadn’t read through in a few years. This gave me the inspiration to try to see if I could design a cycloid stage for a VP.
After a little research I started modelling up a prototype in SolidWorks. A few failed attempts later (mostly learning to use equation generated curves), I came up with the below model. It utilizes a 4:1 VP gearset (the sun gear and carrier plate), along with a custom made “ring gear” and cycloidal disk.
From here I proceeded to print an initial prototype on my Prusa MK2, which turned out fairly well. It only took about 4 attempts for me to get the fit I was looking for between the cycloidal disk and the ring gear.
The general motion/principle of the cycloid gearbox appeared to work, so I ordered in a VP to assemble and test. That should be in later today… But me being the impatient/eager person I am, I also decided to begin work on an aluminum ring gear at work today…
This was cut on our 10kw laser from 1/2" 6061, and should be getting a couple bores put in by the machine shop early next week. Over the weekend I plan to try and assemble the printed version and see where things go from there. I plan to update this thread as I go with my results.