Globe motor backdrive!!

[EStokely]

Originally Posted by FadyS.

The arm is used to hang the bot and to pick up the 2X ball.


EDIT: Hanging isn't the problem because we set stops at that point when the arms are pointing all the way up. It's picking up the 2X ball that we're having trouble with.

We had the same problem with the Van Door motor. I knew it would be a problem. We used gas springs. (those things that keep the hatch up in a SUV or station wagon)
Point the arm at its max angle (in our case its straight up) and use that as the slack point (no pressure on the gas spring) attach one point on the arm itself and the other end on the arm support. As the arm lowers it compresses the gas spring (i.e. spring puts a force upward) if you balance it out correctly the arm should sit where ever its positioned and only move because the motor puts power on it.

Hope taht helps