5.1.10 When The Motor Vibrates Abnormally - Mitsubishi Electric FATEC FR-A800 Manual

5
BREAKDOWN MAINTENANCE

5.1.10 When the motor vibrates abnormally

10-A
Resonance phenomenon
NO
Is the load large?
NO
Is the V/F
control used?
YES
Lower G000 (Pr.0): Torque boost.
Perform offline
auto tuning.
YES
Can the load
be reduced?
Reduce the load.
Can the
YES
acceleration time
be lengthened?
Set the acceleration
Review the motor
time longer.
and inverter capacity.
The motor vibrates unusually.
Is there
YES
a mechanical scrape,
contact, or
looseness?
NO
Check installing condition of
shafts, bearings, and fan motors.
Is the
YES
motor resonating with
the machine?
NO
YES
Can the belt
be removed?
NO
YES
Is the inertia large?
NO
YES
Is the drive
shaft long?
YES
Does OL
alarm occur?
NO
YES
Is the
output voltage
unbalanced?
YES
NO
Is there
any fluctuation in the
power supply
voltage?
NO
NO
The inverter is faulty.
Replace it with a substitute
or return it to the factory to repair.
speed 1800 r/m or
slower at IPM?
Is the
NO
running frequency
high?
Use the frequency jump function.
YES
Increase the mechanical rigidity.
Can
YES
SOFT-PWM career
frequency be
changed?
Release SOFT-PWM selection.
NO
Change the career frequency.
YES
Is the long-wiring
mode enabled?
NO
Disable the long-wiring mode.
NO
Is a
reactor installed?
YES
base frequency
Can the
NO
voltage be
reactor be
removed?
YES
Remove the reactor.
inverter the
800 series?
Increase the mechanical rigidity.
NO
Is the load
fluctuation large?
YES
Set G002 (Pr.19) base
frequency voltage to value
other than 9999.
Review the power supply.
The motor is faulty.
Replace it with a substitute or
return it to the factory to repair.
5.1 Troubleshooting
Is the
YES
NO
1800 r/m or slower is invalid.
Review the load deceleration
ratio, motor capacity etc.
Can the
YES
lowered?
Lower G002 (Pr.19)
NO
base frequency voltage.
Note that if the voltage is
lowered too much, the
torque is decreased.
Is the
YES
NO
Select the speed smoothing
function.
G410 (Pr.653): Proportional gain
G411 (Pr.654): Cutoff frequency
YES
NO
Reduce the
load fluctuation.
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