I got a Fanuc 15MF that we replaced the rotary B-axis encoder on. We had problems referencing the axis. That problem is fixed and just recently it started shaking when rotating. It was working fine. I looked at all the settings they appear to be fine but I never had to adjust them. I am not sure if maybe the chuck clamp for the table is stuck on when it is trying to rotate. There is a shaft for turning the table by hand with a wrench but it will not move.
Any ideas as to settings that maybe need to be adjusted or were to look to see if the break is on.