Motion Control tuning

Hello,
I have a Advanced Motion Controls brushtype PWM servo amplifier (120A10D) and not being an expert I need a simplified explanation of what to expect from the motor when adjusting the 'Loop Gain' pot. The application calls for 6000 ohms and I seem to get better performance with 3000 ohms. Is there a danger of setting the resistance too high or too low? What actually changes in motor performance as the loop gain is changed from say 10k down to 2500 ohms?

A resistance is not a gain. A proportional gain would be something link %control output per position unit of error.

Peter,
Without knowing anything about his drive, it sounds like his % gain is set via a pot. Maybe a 10k pot?

Without more info on the drive, we're grasping at straws.

-rpoet

that's right rpoet, it is a pot and it has a range of 0 to 40k ohm. I connect the ohmmeter across the pot terminal and signal ground and the pot varies the resistance while watching the ohms reading on the meter.