8. TROUBLESHOOTING
8 - 75
acceleration/deceleration is
overshooting exceeding the
limit of the servo motor when
the motor stops.
during
acceleration/deceleration if
torque/thrust exceeds the
maximum torque/thrust.
increasing acceleration/
deceleration time and reducing
load.
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]).
An unusual noise is occurring
atthe 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]).
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 lock 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
lock 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
lock release timing is not
correct.
Check the lock release
timing.
Review the lock 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]).
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.
Execute the advanced vibration
suppression control .
Feedback pulses are being
miscounted due to entered
noise into an encoder cable.
Check the cumulative
feedback pulses using status
display or setup software (MR
Configurator2
TM
) 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.
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.
To Next Page
Loading...
Need help?
General