Rather late reply, but might help someone.
Probably dirt/dust on encoder disk.
Carefully try a little air across the encoder disk. No chemicals or brushes!!
HELLO EVERYBODY IN THE FORUM CLUB HOUSE . I HAVE CHANGED THE PANASONIC AC SERVO MOTOR MODEL NR."MQMA042A1E"WITH CONNECTION CABLE ON A DRIVE MODEL NR."MQDA043A1A"THE AXIS ON ANY MODE ,HOME ,MPG,MDI AFTER TURNING IN CIRCLE 28.DEGREE IT IS GIVING ME "ERROR COUNTER OVERFLOW" I PUSH THE RESET BUTTON IT 'S TURNING JUST 28 DEGREES AGAIN AND GIVING SAME SAME ALARM ON THE CONTROLLER ONLY .THE DRIVER SHOWING NO ERROR .
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Rather late reply, but might help someone.
Probably dirt/dust on encoder disk.
Carefully try a little air across the encoder disk. No chemicals or brushes!!
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. THREE ways to fix things: The RIGHT way, the OTHER way, and maybe YOUR way, which is possibly a FASTER WRONG WAY!