Just a quick question I was hoping someone could answer.
I've just completed the project of CNC'ing a benchtop milling machine and everything seems to be working fine. I'm running three 495 in. oz. steppers for each axis and one of the steppers makes some noise when stopped. The noise is a very high-pitched whine when the motor has current applied but is stationary. When it starts moving, the noise disappears. I tried to rotate the shaft to see if it was doing this at just one spot on the armature but it does it no matter where it stops. The other two motors are completely silent when not moving. Does this noise indicate some type of problem with the motor?
Thanks for your help.
Dennis