Fanuc Spindle Amplifier Alarm 39

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

The position where the one-rotation signal for Cs contour control is generated is incorrect. This alarm is not issued when the parameter indicated below is not set.

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 41. 

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 shielding of the cable between the preamplifier and SPM is faulty. 
   4. The signal cable is bundled with the servo motor power line. If the cable between the preamplifier and the SPM is bundled with the servo motor power line, separate them from each other.
   5. Improve the cable routing between the motor and preamplifier.
   6. The SPM is faulty. Replace the SPM or SPM control printed circuit board.