The Increase In The Servo Motor Speed Is Insufficient Or Excessive; Vibration Of Servo Motor At Low Frequency - Mitsubishi Electric MR-J5-G Series User Manual

The increase in the servo motor speed is insufficient or excessive

Possible cause
1.
The settings of the speed command, speed
limit, or electronic gear are incorrect.
2.
The connection of the servo motor is incorrect.
3.
The voltage of the main circuit power supply
has dropped.
4.
For a servo motor with an electromagnetic
brake, the brake has not been released.
5.
The selection of SP1 (Speed selection 1), SP2
(Speed selection 2), or SP3 (Speed selection
3) is incorrect in the speed control mode and
the torque control mode.
6.
The analog signal was incorrectly inputted in
the speed control mode and the torque control
mode.

Vibration of servo motor at low frequency

Possible cause
1.
The estimated value of the load to motor
inertia ratio by auto tuning is incorrect. The
value of the load to motor inertia ratio which
was set manually is incorrect.
2.
The command from the controller is unstable.
3.
When the servo motor stops, torque or thrust
at acceleration/deceleration overshoots
exceeding the limit of the servo motor.
4.
The servo gain is too low or the response of
the auto tuning is too low.
Check/action method
Review the settings of the speed command, speed limit, and electronic gear.
Check the U/V/W wiring.
Refer to "Example power circuit connections" in the following manual.
MR-J5 User's Manual (Hardware)
Increase the voltage of the main circuit power supply.
Turn on the electromagnetic brake power.
Review the settings of SP1, SP2, SP3, and setting of the internal speed.
Check the values of the analog speed command and the analog torque
command on the status display or on MR Configurator2.
Check/action method
Execute the auto tuning or one-touch tuning to set the load to motor inertia
ratio again. When setting manually, set the load to motor inertia ratio correctly.
Refer to the following manual.
MR-J5 User's Manual (Adjustment)
Review the command from the controller.
Check if the Ethernet cable is disconnected or has other problems.
If the torque at acceleration/deceleration reaches the maximum torque, reduce
the generated torque by increasing the acceleration/deceleration time,
reducing the load, or other measures.
Increase the servo gain or the value of [Pr. PA09 Auto tuning response].
1 SERVO AMPLIFIER TROUBLESHOOTING
1.4 Trouble which does not trigger an alarm/warning
1
Model
[A]
[G]
[WG]
[A]
Model
[A]
[G]
[WG]
203