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Unread 09-10-2015, 20:38
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asid61 asid61 is offline
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AKA: Anand Rajamani
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Re: pic: GBX-136 swerve drive

Quote:
Originally Posted by kyle_hamblett View Post
I never would have thought to use a worm gear to turn a swerve module. Very creative. Correct me if I'm wrong (I'm more of an electrical guy) but wouldn't the worm gear reduce the potential speed to turn the module? If you end up assembling it, I'd love to see how it turns out.
I was worried about the efficiency loss so I used the chart and equations on this page to calculate the efficiency loss from the worm gear, and got around 86% efficiency. A 4-lead worm gets around 93% efficiency. I have not measured data on the common BaneBots planetary reductions or Versaplanetaries, but assuming they have 2 planetary stages, it should be around 92% tops (98% per spur gear), although I have not had great experiences efficiency-wise with either.
We would be making GBX-134 instead of this one due to easier manufacture, if any. We don't own a CNC; this was just a lightening exercise for me.

EDIT: You can find both the CAD for GBX-134 and GBX-136 here at our GrabCAD CAD release. Look in the folders labeled "GBX-134" and "GBX-136". If you want to avoid downloading the entire Parts library, just PM me and I will send the assembly to you without that.
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Last edited by asid61 : 09-10-2015 at 20:49.
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