1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 122
Description
Possible cause
Check result
Action
Target
An unusual noise is
occurring at the servo motor.
The servo gain is low. Or the
response of auto tuning is
low.
Check if the trouble is solved
by increasing auto tuning
response ([Pr. PA09]).
Adjust gains.
[A]
[B]
[WB]
[RJ010]
[GF]
Bearing life expired.
If the servo motor may be
driven with safety, remove
the load and check the noise
with the servo motor only.
If you can remove the servo
motor from machine, remove
the servo motor power cable
to release the brake and
check the noise by rotating
the shaft by your hands.
Noising means that the
bearing life expired. Replace
the servo motor. When not
noising, maintain the
machine.
For a servo motor with an
electromagnetic brake, the
brake has not released.
Check the power supply of
the electromagnetic brake.
Turn on the electromagnetic
brake power.
For a servo motor with an
electromagnetic brake, the
brake release timing is not
correct.
Check the brake release
timing.
Review the brake release
timing. Please consider that
the electromagnetic brake
has release delay time.
The servo motor vibrates.
The servo gain is too high.
Or the response of auto
tuning is too high.
Check if the trouble is solved
by reducing auto tuning
response ([Pr. PA09]).
Adjust gains.
[A]
[B]
[WB]
[RJ010]
[GF]
The machine is vibrating
(resonating).
If the servo motor may be
driven with safety, check if
the trouble is solved by one-
touch tuning or adaptive
tuning.
Adjust the machine
resonance suppression filter.
The load side is vibrating.
If the servo motor may be
driven with safety, check if
the trouble is solved by
advanced vibration
suppression control II.
Execute the advanced
vibration suppression control
II.
Feedback pulses are being
miscounted due to entered
noise into an encoder cable.
Check the cumulative
feedback pulses using status
display (only [A]) or MR
Configurator2 if its numerical
value is skipped.
Please take
countermeasures against
noise by laying the encoder
cable apart from power
cables, etc.
There is a backlash between
the servo motor and machine
(such as gear, coupling).
Check if there is a backlash
on the machine.
Adjust the backlash on the
coupling and machine.
The rigidity of the servo
motor mounting part is low.
Check the mounting part of
the servo motor.
Increase the rigidity of the
mounting part by such as
increasing the board
thickness and by reinforcing
the part with ribs.
The connection of the servo
motor is incorrect.
Check the wiring of U/V/W.
Connect it correctly.
An unbalanced torque of the
machine is large.
Check if the vibration varies
depending on the speed.
Adjust balance of the
machine.
The eccentricity due to core
gap is large.
Check the mounting
accuracy of the servo motor
and machine.
Review the accuracy.
A load for the shaft of the
servo motor is large.
Check the load for the shaft
of the servo motor.
Adjust the load for the shaft
to within specifications of the
servo motor.
For the shaft permissible
load, refer to "Servo Motor
Instruction Manual (Vol. 3)".
An external vibration
propagated to the servo
motor.
Check the vibration from
outside.
Prevent the vibration from
the external vibration source.
Содержание MELSERVO MR-J4-B-RJ Series
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Страница 145: ...2 TROUBLESHOOTING FOR MR CV_POWER REGENERATION CONVERTER UNIT 2 8 MEMO ...
Страница 155: ...3 TROUBLESHOOTING FOR MR CR55K 4 RESISTANCE REGENERATION CONVERTER UNIT 3 10 MEMO ...
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