So I did a few more checks today. The motor is a SEM MT30 with Heidenhain ERO 120 encoder and built in tach. When I power up the X it just sits there in torque, when I grab the belt and pull the motor will pull back, but movement and no flickering on the following error.
I switched the drives, same thing. I reversed the tach wires the motor ran away but did register a value on the X position display when it ran away which leads me to believe the encoder is ok?
I canít see the tach because itís inside the motor behind the encoder and I donít see any brushes, I was hoping I could clean the com and brushes.
Can I put a 12 v battery charger to the motor and check the tach, or more to the point, how can I check the tach, it looks too difficult to remove the encoder and knowing my look, the tach will be good but I will break the encoder getting it off the motor.