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I love this thing! Very clever to counterbore the pulley so that it can use the full width of the tube.
Looks super compact and lightweight, and above all very clean, great work. Interesting that you used OnShape for this, I have a few friends who love it or hate it. :D |
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As for OnShape, I've expressed my thoughts here. |
Re: pic: Another Belt-In-Tube Drivetrain
2 inch square .125 wall 6061-T6 is readily available ( On-line Metals, et al). Seems like this would eliminate machining of cots parts, and potential rubbing of the belts.
It seems like many teams just use 1.5x2, but there's no need to constrain yourself to it. |
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(or inside the tube... eyyyyy) |
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The extra inch of space really does help sometimes. |
Re: pic: Another Belt-In-Tube Drivetrain
How do you plan to attach your belly pan to this setup? We use belt in tube and I have wanted to go to a smaller tube but I always worry about the rivets rubbing the belt.
An alternative to pocketing the belts is to add .125" thick washer (spacers) to the bearings before putting them into the tube, that makes them flush with the interior or the tube. |
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Regardless, I think this is mostly an academic exercise - this particular belt in tube configuration has by now been battle tested on dozens of FRC robots without failures. It's a very reliable drivetrain. |
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