[Q] What’s the standard electronic coupling method to eliminate wire binding in robotic arm joints?

I know about slip rings but I cant seem to find many options online that aren’t really expensive so I’m wondering how robotic arm designers avoid wire pinching/binding at the joints. Are they just designed with slack in the wires and limited motion when it’s not necessary to have over 360 deg of rotation? Or is there some other more common solution like using belts/ cables/ or is it just simpler for each motor to have it’s own independent circuit?

submitted by /u/MrTheTurtle
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