The Y axis just began making a grinding sound and the motion is very rough. I switched the Y stepper over to one of the X terminals at the controller and it was smooth as glass. As per Geralds suggestion in another post about a similar problem, I looked for the heatsinks and corrosponding controllers, but did not find any. I have a PRT96 that is about 7 months old. I'm suspecting that the issue is in the box and not the motor. Help!!!
Jim Crawford