Mitsubishi Electric Melservo-J5 MR-J5 Series User Manual page 54

[AL. 052.6_Excessive droop pulse at servo-off]
Cause
1.
The servo motor shaft was rotated by external
force. The moving part of the linear servo
motor was moved by external force.
2.
When the servo motor was rotating, servo-on
was executed. When the linear servo motor
was moving, servo-on was executed.
3.
The controller is malfunctioning.
4.
The encoder or the servo motor is
malfunctioning.
5.
The servo amplifier is malfunctioning.
1 SERVO AMPLIFIER TROUBLESHOOTING
52
1.3 Handling methods for alarms/warnings
Check/action method
Make sure that the servo motor is not rotated (moved) by external force.
Turn servo-on when the servo motor stops.
Replace the controller, and then check the repeatability.
Replace the controller, and then check the repeatability.
Replace the controller, and then check the repeatability.
Model
[A]
[G]
[WG]