Mitsubishi Electric MR-J5-G Series User Manual page 71

[AL. 052.6_Excessive droop pulse at servo-off]
Cause
1.
The servo motor shaft was rotated by an
external force. The moving part of the linear
servo motor was moved by an 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 has malfunctioned.
4.
The encoder or the servo motor has
malfunctioned.
5.
The servo amplifier has malfunctioned.
Check/action method
Make sure that the servo motor is not rotated (moved) by an external force.
Turn servo-on when the servo motor stops.
Replace the controller, then check the repeatability.
Replace the servo motor or linear encoder, then check the repeatability.
Replace the servo amplifier, then check the repeatability.
1 SERVO AMPLIFIER TROUBLESHOOTING
1.3 Handling methods for alarms/warnings
1
Model
[A]
[G]
[WG]
69