Fanuc Spindle Amplifier Alarm 40

Fanuc 6055 digital spindle amplifiers
Fanuc 6063, 6064 serial spindle amps
Fanuc 6072, 6078, 6082, 6088, 6102 amps

The one-rotation signal for Cs contour control is not generated. 

When SPM TYPE2 is used, phase A/B/Z on the high-resolution (1000 to 3000λ) side of the high-resolution magnetic pulse coder on the spindle side has a problem.

When SPM TYPE4 is used, the spindle sensor connected to JY5 is faulty. Troubleshoot as in the case of alarm code 42.

1. Troubleshooting when this alarm is issued (at the time of reference position return on the Cs axis)
   1. The setting of a parameter is incorrect. Referring to Chapter 2 in "FANUC SPINDLE MOTOR a series Parameter Manual (B-65160E)," check the parameter for sensor setting.
   2. The sensor is not adjusted correctly. Adjust the sensor according to Subsection 4.3.4 of Part I of this manual. If the signal is not observed, replace the sensor.
   3. The cable is disconnected. Check the check pin PSD on the check board. If the signal is not observed per sensor rotation, replace the cable.
   4. The SPM is faulty. Replace the SPM or SPM control printed circuit board.