10 Troubleshooting and Maintenance
10 - 20
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
The Servomotor
generates
abnormal noise or
vibration.
(continue)
There is a resonance
between the machine and
the motor.
Check to see if there is a mechanical
resonance.
• Readjust the Torque
Command Filter Time
Constant values.
• If there is a resonance, set
the following parameters:
Notch 1 Frequency Setting
(Pn201), Notch 1 Width
Setting (Pn202), Notch 1
Depth Setting (Pn203).
Vibration occurs at
the same
frequency as the
commercial power
supply frequency.
Inductive noise is present.
Check to see if the control signal
wiring of the Servo Drive is too long.
Shorten the control signal line.
Check to see if the control signal line
and power supply line are bound
together.
• Move the control signal line
away from power supply line.
• Use a low-impedance power
supply for control signals.
The Servomotor
falls out of
position.
(Positional
deviation occurs
without alarm
output.)
There is an error in the
coupling between
mechanical systems and
the Servomotor.
Check to see if positional deviation
occurs in the coupling between
mechanical systems and the
Servomotor.
Correct the coupling between
mechanical systems and the
Servomotor.
• The Error Counter Reset
Input (ECRST) signal is
affected by noise.
• The position command
pulse (CW or CCW) input
signal is affected by
noise.
Check to see if the control signal line
and power supply line are bound
together.
Take measures against noise;
for example, separating the
control signal line from the
power supply line.
Check to see if the cable is a common
shielded twisted-pair cable with at
least 0.08-mm
2
core wires.
Use a control I/O signal cable
that meets the specifications.
Check the length of the control I/O
signal cable.
Limit the wiring length of the
control I/O signal cable to 10 m
or less for line driver input and
3 m or less for open collector
input.
The gain setting is
inappropriate.
–
Perform manual tuning.
The load inertia is too large. Check for the following:
• Is the load too high?
• Is the motor speed too high?
• Adjust the gain.
• Review the load conditions
and replace the Servomotor
and the Servo Drive with
proper ones.
Symptom
Probable cause
Check items
Measures
Summary of Contents for G5 R88D-KE Series
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