After initialing my machine, I am getting a grind noise when the spindle is raised to the top of Z. It stops about 1/4. inch short of the top - compared to when the machine is initialized.
This happens if I lower the spindle to set zero or just lower and then raise.
I made sure nothing is binding by removing dust collection and checking the power cable to the spindle. I have done maintenance by doing the oil in the bearings and grease on the rods (sorry forget the actual name).
After it grinds and catches, I can raise and lower, and it will not repeat the grind. But it stops at that quarter inch lower than machine initialization. If I initialize the machine, it is again at the top of the rails. But if I lower and raise it grinds and stops about a quarter inch short.
I have a video, but it won’t allow me to upload a video.
Any ideas on this?.