Okuma Alarm-D 4170 MCS Magnetic encoder alarm
The magnetic pulse generator has become unable to detect the motor speed. Or, the number of magnetic encoder gear teeth does not match the data in the MCS data file.
Axis name or none (spindle)
XXXX= Error content
A->A-phase voltage is abnormal.
B->B-phase voltage is abnormal.
C->Magnetic encoder data error
Others-> Servo data file set value detected when the count over error occurred in the magnetic encoder (No. of PG gear teeth * 4 – 1)
YYYY= Additional error data (Varies with XXXX.)
If XXXX is A, A-phase voltage appears.
If XXXX is B, B-phase voltage appears.
If XXXX is C, 0 (fixed) appears.
Others-> Detected count value of magnetic encoder (No. of PG gear teeth * 4 – 1)
Probable Faulty Locations
– Magnetic encoder or its wiring, or large gap between magnetic encoder and gear
– Mismatch between the number of gear teeth of magnetic encoder and the servo data file data