I am in need of someone that can test my Parvex Z-axis motor on another TC22 machine or that can provide an alternate method to analyzing my problem. The motor and the encoder have been tested and serviced but I still get a "Following Error" fault when the motor performs a Z-axis rapid. Typically in the positive direction. The motor shutters just before the "Following Error" fault. I have also observed a bounce at the end of a negative rapid move. I can't tell if this is due to lack of torque in the motor, faulty drive, or some type of disrupted feedback with the encoder. A-1 Servo Motor Repair performed the service on the motor and indicated that the permanent magnets did not require recharging because the BEMF measurement (48VDC) was within spec (52VDC +/- 10VDC). I really don't want to buy a different motor unless I know that is indeed the problem. If the motor is installed in another machine and the "Following Error" fault occurs in that machine, I think I can safely deduce that the problem is the motor. If not, I will move to the drive or the encoder and/or its cable.