Hello all, I read a forum long enough but now I decided to write the first post. My machine is a Mori Seiki SL-3B With Fanuc 5 . I have following problem .If the spindle is at any higher speed and I turn the knob is quickly reduce the speed, the circuit shuts down and I get the alarm. When pressed a NOR or REV to start the spindle, the circuit shuts down and I get the alarm. It is interesting that sometimes spindle start normally and there is no problem with speed control (not the circuit shuts down and I get the alarm). Alarms Appearing "over current field loss" and sometimes "Error excess phase sequences". The problem is only in reducing of rotation or off the spindle. With increasing of rotation of the problem is not there. Please help me what is the cause. Sorry for my English.
Similar Threads:
Last edited by blasterpl; 12-11-2014 at 02:43 AM.
Unfortunately, the problem returned. How to check who hybrid ics. damaged?