our team is thinking about using a PVC pipe with grooves cut into it as a cheap and easy pully for poly cord. our only issue right now is how to drive it with standard hex shaft. Any ideas?
We’ve just 3D printed an adapter with a 1/2 inch hex opening on the inside and left a couple of millimetres for electrical tape around the outside to give it friction against the inside of the pvc
PVC end cap with a center bore and hex broach.
PVC end cap with a bolt circle attached to a hub from AndyMark or VEX
3D printed end cap with a hex bore
We used pvc end caps and used our lathe to Make groves so it didn’t slide and broched a hex hole into the end cap and used a vp gear box with hex output
We have publicly available Cad for Protopipe: http://spectrum3847.org/protopipe-rapid-prototyping-system. Here is an example: https://d2t1xqejof9utc.cloudfront.net/screenshots/pics/50b1d5942dba70a711cb1a324f9e8f64/large.JPG
Or The Thrifty Bot’s thicc boi hubs.
I’d suggest at least using Schedule 80 PVC for cutting grooves
We have a former mentor who helps us fron time to time. He used a lathe to mill two pieces of plywood down to circles that were a press fit (4 inch diameter) into the pvc pipe.
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