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SwannSchilling / Cycloidal-Drive

3D Printed Gearbox
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Modifications to allow use of larger motor #3

Open MostHated opened 4 months ago

MostHated commented 4 months ago

Hey there, this looks like a great design. I had a question regarding larger motor sizes. I have a few GBM5208-75T motors. Would it be possible to adjust this to allow the use of larger sized motors? I am assuming that one could not simply scale the print larger to try and accommodate the larger motor size, as that would completely throw off the bearing sizes needed and things of that nature.

I do have the Maker version of Solidworks, and Fusion360, but have still been learning the basics of sketching/extruding as well as modifying existing parameters, so not quite at a level where I could jump right in and know what to do where. In your opinion, how difficult would it be (or do-able at all) if I were to try and modify it while not screwing it up?

SwannSchilling commented 4 months ago

There are a few caveats in simply scaling up the design, while it is theoretically possible. First of all you would need to be really carefull to scale in a way that your new bearing sizes will work and second thing is that all screws and steel pins would need different sizes.

Depending ob how good you are understanding code, you could also just use the Fusion 360 script and have it build one that suits your needs!

Hope this helps...

MostHated commented 4 months ago

Oh man, how did I not notice that script. That's the only thing in this repo, lol. That should work out great. I appreciate it. :+1:

MostHated commented 4 months ago

I tried to first see if I could lower the gear ratio, setting the ringGearPins count to various lower values (8, 9, 11, 14) but could not seem to get a usable result. Either it would error out, or the end result wasn't usable. I am not sure if other values than just that need to be adjusted at the same time, but it didn't seem like it should. I could have missed it, though.

Also, did you have to manually create the flat backing for the bearings that go in the rotor output holes? The model that you can download from printables, those holes (when you push in the small bearings) have a 'stopper' at the back so the bearing doesn't go all the way through, but none of my attempted script runs had those.

SwannSchilling commented 4 months ago

Did you check the video I made on YouTube? And yes, I made those stoppers after the script ran, but they are not necessary, it will also work without them!