We had a similar problem with our EZTRAK even after doing all the comp and backlash checks.
Turns out that the tach circuitry in the motors was defective. Also, the encoders were dirty due to brush dust goo.
If the motors are SEM, Clarkson near Chicago will service them as they are the factory service center.
We'll surely have to retune the servos to the amps when we get them back. |