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11-4 Troubleshooting
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
11
Troubleshooting and Maintenance
Vibration is occurring
at the same
frequency as the
power supply.
Inductive noise is occurring. Check to see if the drive control signal
lines are too long.
Shorten the control signal lines.
Check to see if the control signal lines
and power supply lines are not bound
together.
· Separate control signal lines
from power supply lines.
· Use a low-impedance power
supply for control signals.
The position is
misaligned.
(Position
misalignment occurs
without an alarm
being output.)
There is an error in the coupling
of the mechanical system and
the Servomotor.
Check to see if the coupling of the
mechanical system and the Servomotor
is misaligned.
Correct the coupling between the
mechanical system and the
Servomotor.
· Noise is entering on the error
counter reset (ECRST)
input.
· Noise is entering on the
position command pulse
(CW and CCW) inputs.
Check to see if the control signal lines
and power supply lines are bound
together.
Separate the control signal lines
from the power lines or take other
measures against noise.
Check to see if it is a shielded twisted-pair
cable with core wires that are at least 0.08
mm dia.
Use a control I/O signal cable that
meets specifications.
Check the length of the control I/O signal
cables.
Do not allow the length of the
control I/O signal cables to
exceed 10 m for a line driver input
and 3 m for an open-connector
input.
The gain is wrong. − Perform manual tuning.
The load inertia is large.
Inspect the following.
· Is the load too large?
· Is the motor rotation speed too high?
· Adjust the gain.
· Review the load conditions,
and replace the Servomotor
and Servo Drive with
appropriate models.
Symptom Probable cause Items to check Measures
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