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Troubleshooting
8. Troubleshooting
Digitax SF Instruction Manual
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, couplings, 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 lter.
For high-frequency vibration, adjust the low-pass lter or notch lter.
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.
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