FANUC | SP9073 Serial Spindle Error Alarm

Spindle Sensor Alarm 9073 (Serial Spindle Error)


1 Cause of alarm:

The spindle amplifier SPM LED displays "73" in alarm #9073, which is caused by an abnormal sensor signal from the spindle motor. The cause of the alarm can be a 3-way failure of the spindle amplifier, the spindle motor sensor, and the sensor's feedback cable.


Spindle drive alarm code: 73


2SP9073 Motor sensor disconnected


Amplifier Alarm Code: 73


Alarm Cause: motor sensor feedback signal disconnected


Troubleshooting ideas:

1
Replace the spindle feedback cable

2
Check the spindle cable connection status, feedback line shielding treatment, etc.