Panasonic MDDDT5540 - Manual (Page 73)

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Important
information
The motor produces an abnormal sound and/or vibration.
C a u s e s
The gains are too large.
T h e v e l o c i t y d e t e c t i o n f i l t e r i s
not proper.
R e s o n a n c e b e t w e e n t h e m a -
chine and motor occurs.
Motor bearing
Electromagnetic sound, gear sound,
braking sound, hub sound, rubbing
sound from the encoder, etc.
C o u n t e r m e a s u r e s
Decrease the values of Pr10 (position loop gain) and
Pr11 (velocity loop gain).Change the value of rotary
switch gain.
Increase the value of Pr13 (speed detection filter)
until the sound decreases to an acceptable level, or
return the value to 4 (default).
Adjust the value of Pr14 (Torque filter time constant).
Check the mechanical resonance using the frequency
characteristics analysis program in PANATERM “ . If a
resonance occurs, set Pr1D(notch frequency).
Operate the motor without load in order to check
the sound and vibration near the bearing. Replace
the motor and operate it to do the same checks.
Repair the motor, if necessary.
Operate the motor without load or use a new motor
in order to locate the source of sounds. Repair the
motor, if necessary.
C a t e g o r y
A d j u s t m e n t
Installation