Okuma Servo Motors and MIV Units
Okuma builds its own motors and encoders along with the drives and the CNC control. MIV inverter units drive the axis motors and communicate with their encoders over the encoder link. One independent drive repair shop describes MIV servo drives that run Okuma BL and PREX servo motors.
Okuma Servo Motor Repair Shops
Northline Industrial
Redford, MI
Brands: Fanuc, Makino, Okuma
Alarms That Point to the Motor
Alarm 1151 MCS INVERTER UNIT DETECTED AN ERROR can come from motor overcurrent or a shorted motor. Okuma warns that a faulty motor can damage the whole drive unit. Alarm 1181 MCS DIFF OVER means an axis cannot reach its commanded position. A damaged servo amp, cable, or motor can cause it along with mechanical problems, broken tools, and chip buildup.
Okuma’s drive manual answers encoder link errors with a check or change of the encoder link cable. A motor overcurrent alarm on an MIV unit can call for a motor change. That shop narrows an encoder initialization error by swapping the motor or encoder with another one to see whether the fault follows the motor or stays with the MIV unit.