Omron G5 Series User Manual page 464

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