Nidec Control Techniques Digitax-SF DA21223, Instruction Manual

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8
Troubleshooting
8. Troubleshooting
Digitax SF
Instruction Man
ual
４. Troubleshooting
4. Troubleshooting
Problem 6（Vibration and abnormal noise）
Cause Remedy
Tuning parameter settings are not
appropriate.
Set the Control Gain 1, Control Gain 2, Integral Gain to lower values.
Especially for
very
rigid equipment such as ball screws, set the Current
control gain (193.0) to 1 if noise occurs at servo-on stop.
7 Tunings
Loose Mechanical Couplings
Check the installation of the motor, decelerator, coupl
ings
, and so on.
Noise interference is occurring.
Check the length or shield of each cable.
Separate
the high voltage cable such as motor power cable from the signal
cable such as encoder cables.
Avoid parallel cable runs
The equipment and the motor are
resonating.
For low-frequency vibration, adjust the position command smoothing filter.
For high-frequency vibration, adjust the low-pass filter or notch filter.
Motor load is substantially large
(*)
(Alarm No.7 is displayed)
Set the inertia condition parameter to “Heavy”
Keep adjusting the Position Command Smoothing Filter to smooth
the
command until the vibration at the time of acceleration becomes eliminated.
Set the
Inertia ratio (102.0) to 3,000.
To stabilize the motion, increase Integral gain value according to Control
Gain 1 and Control Gain 2.
The current pairing of
drive
and motor is not right.
Check the motor model code under “Communication Settings” tab in
Digitax
SF Connect
. In case of
incompatibility
, clear the parameters saved in
EEPROM and change the motor.
*) This problem may occur in a low-rigidity case such as belt drive
if the
load inertia ratio is over 30 times.
The motor is experiencing vibration or abnormal noise.