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.

Thanks Guys!!
Stevo