Should I use belts/chains for my robot arm actuators?

It seems to me like if I could keep the weight of the motors at the base of the arm, there would be less weight on the arm itself so the motors wouldn’t need to be as large or wouldn’t need to compensate for their own weight as much.

That is if the weight of the belt/chain and sprocket/stuff like that setup would be lighter in weight than the direct drive motor+gears setup.

Would it be better? Why don’t all arms use belts/chains?

submitted by /u/PlasticGears
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