Big Worm motor holding position problem.

[mariant]

I recently changed my wiper motors, for 2 big worm 200W 25:1 gear. (Motion Dynamics). i have 2 pololus jrk12. when i setup feedback limits, finaly they go beyond limits. cant hold the limits i set, so jrk throw error (feedback disconnect). with wiper motor this doesnt happen. Probably my new lever arms are to long, or my PID setting are wrong, tried 3\3 0\3 3\3 cycle 400.

[prodigy]

Can you post a picture of where your motors are positioned, with lever arms too? It could be a PID settings.. So your motor reaches the limit you set in JRK utility and then gos a little bit further than that and makes a whole round? Are you using JRK utility slider to test min and max point to reach?

[mariant]

Well.. was a PID setting isue, i changed values, added rubber tops at the end of the lever arms, and everything Works fine.