If you swap this motor with another axis, and the problem follows the motor, then the problem may be the encoder.
It can be checked with a power supply and a oscilloscope.
Are you getting a measuring system defective error?
Say hello to Dave Smith from me. We worked together from 82 to 87 out of the Bristol PA office.
George
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
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