12-33
12 Troubleshooting and Maintenance
G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
12-4 Troubleshooting
12
12-4-3 Troubleshooting Using the Operation State
The Servomotor does not
stop or is hard to stop
even if the servo is turned
OFF while the
Servomotor is rotating.
The load inertia is too large. • Check the load inertia.
• Check the Servomotor
rotation speed.
• The dynamic brake
resistance is disconnected.
• Review the load inertia.
• Replace the Servomotor and
Servo Drive with proper
ones.
The dynamic brake is
disabled.
Check if the dynamic brake is
disabled or broken.
• Enable the dynamic brake, if
it is disabled.
• Replace the brake if it is
broken or if the resistor is
disconnected.
The Servomotor or the
load generates abnormal
noise or vibration.
Vibration occurs due to
improper mechanical
installation.
Check to see if the
Servomotor's mounting screws
are loose.
Retighten the mounting screws.
Check the load for eccentricity. Eliminate the eccentricity. It
results in torque fluctuation and
noise.
Check to see if the coupling
with the load is unbalanced.
Balance the rotation.
Check to see if the decelerator
is generating any abnormal
noise.
Check the decelerator
specifications. Check the
decelerator for malfunctions.
Vibration occurs due to low
mechanical rigidity.
Check to see if the vibration
frequency is 100 Hz or lower.
If the frequency is 100 Hz or
lower, set the correct damping
frequency for the damping filter
to eliminate the vibration.
Vibration occurs due to
machine resonance.
Check to see if the resonance
frequency is high or low.
If the resonance frequency is
high, set the adaptive filter to
eliminate the resonance.
Alternatively, measure the
resonance frequency and set
Notch Filter 1 and 2.
There is a problem with the
bearings.
Check for noise or vibration
around the bearings.
Check to see if the bearings
are mounted properly, and
adjust them if necessary.
The gain is wrong. − Check if manual tuning can
achieve proper adjustment.
The Speed Feedback Filter
Time Constant 1 (3103 hex)
is wrong.
Check the set value of object
3103 hex. Normally set 0.
Return the setting to the default
value of 0. Alternatively, set a
large value and operate the
Servomotor.
The Torque Command Filter
Time Constant 1 (3104 hex)
does not match the load.
Review the set value of object
3104 hex.
Set a larger value for object
3104 hex to eliminate the
vibration.
Symptom Probable cause Items to check Measures
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