Omron R88D-GT series User Manual page 468

8-3 Troubleshooting
Symptom
Vibration is
occurring at the
same frequency
as the power
supply.
The position is
misaligned.
(Position
misalignment
occurs without an
alarm being
output.)
8
8-19
Probable cause
Inductive noise is
occurring.
There is an error in the
coupling of the mechanical
system and the Servomo-
tor.
Noise is entering the Devia-
tion Counter Reset Input
(ECRST).
The gain is wrong.
The load inertia is too large.
Items to check
Check whether the Servo Drive
control signal lines are too long.
Check to see whether control signal
lines and power supply lines are
bundled together.
Check whether the coupling of the
mechanical system and the Servo-
motor is misaligned.
Check whether the control signal
lines and power supply lines are
bundled together.
---
Check the following:
• Check whether the load is too
large.
• Check whether the rotation
speed of the Servomotor is too
high.
Countermeasures
Shorten the control signal
lines.
• Separate control signal
lines from power supply
lines.
• Use a low-impedance
power supply for control
signals.
Correct the coupling
between the mechanical
system and the Servomotor.
Separate the control signal
lines from the power supply
lines or take other measures
against noise.
• Perform normal mode
autotuning.
• Perform manual tuning.
• Adjust the gain.
• Review the load condi-
tions, and replace the
Servomotor and Servo
Drive with appropriate
models.