Dear Friends,

We have Bridgeport BPC-320H Horizontal Machining center with Fanuc 11M system in our workshop. Production model year is 1987. We encounter a problem on the rotary table locking system. When we enter M10 command the table is mechanically locked. However after a time on the diagnosis screen we see the parameter 076 become to 01110011 which the machine suppose that lock is open. Normally if we command M10, this parameter must be 00100011 in the table locked situation. We can not operate the machine because the system considers the lock is open although it is mechanically locked. What could be the reason of this failure? Did you face such problem before? Do you have any idea to solve this problem?

I will really appreciate your feeback.