Friends, here’s the situation: https://i.imgur.com/v3jejcY.jpg
I have the C rod (7/32″) turning the Tuning Fork part of the robot arm.
I have the A shaft collar holding the gear on an 8/32″ tube.
I have the B shaft collar holding a gear on a 9/32″ tube.
ABC all turn independently.
At the other end I have three similar gears: https://i.imgur.com/PP2UN9u.jpg
I’m trying to make the gears stay on the tubes. Making plastic stick to metal is hard. A test with a set screw crushed the tube against the stuff inside the tube – bad. cutting a slot in the end of the tube is hard (burring, crushing).
Currently the shaft collars crack and then slip: https://www.instagram.com/p/BsOibIfn6Yc/
I haven’t given up yet on making a good shaft collar.
I’m looking for help to make shaft collars that don’t slip.
If there’s a better way, please show me!
I figure you have a 3D printer. Using our parametric shaft collar tool (https://www.thingiverse.com/thing:3234501) some M2x12 screws. M2 nuts, and our torque handle (https://www.thingiverse.com/thing:3343197) the idea is to print two slightly different shaft collars. test until one fails, evolve the failure, repeat until you have two invincible shaft collars. Share your results below!
*more on the tubes*
I have tube 9/32″ outside tube 8/32″ outside rod 7/32″. the difference between one item and the next is 1/32″ (0.79375mm). The tube wall thickness is 0.014″. That leaves a gap of 0.01725″ (0.43815mm) total. Each of these three items rotates at different times and speeds and they can’t rub on each other.
You must be logged in to reply to this topic.