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MEMO
Troubleshooting
Phenomenon
Detail of checking
Measure, etc
Motor rotates
reversely.
Check the rotate direction setting.
Check the position of the rotate direction
selector switch (CW / CCW) on the front
of the product. When using the input “
I
2”,
set the rotate direction selector switch to
CCW.
Rotation direction of the motor and
gear output shaft may be reversed
for some gear reduction ratio of
gear head.
Check the gear ratio and rotation direction.
Please refer to the table of the permissible
torque (P.28).
Rotation speed
is unstable during
operation (actual
speed).
Check whether the load fluctuates
greatly.
Reduce the fluctuation of load. Increase
the output capacity.
Parameter dose
not change.
Check whether operation start
signal is input.
Some parameters cannot be changed
when operation instruction is on. (See the
check column of parameter list on P.47.)
Turn off operation instruction before
changing.
Motor does not
rotate smoothly
at low speed.
The inertia of the load is small,
such as running the motor alone.
• Drive with load connected
• Increase the load inertia, such as
attaching a flywheel.
• It may be necessary to adjust the speed
loop proportional gain larger. Please
be aware that increasing the speed
loop proportional gain may increase the
vibration during high-speed operation.
Peripheral
electronic
devices
malfunction.
During operation, radio noise may
be generated from input / output
lines, brushless motors, brushless
amplifiers, etc., which may affect
electronic devices.
It can be suppressed to some extent
by installing a noise filter at the input,
storing the electric wire inside the conduit,
installing a noise filter for control signal,
and so on.
Earth leakage
breaker works
unnecessarily
when driving
Leakage current increases when
brushless motor and brushless
amplifier are operated.
Please use self-system and other-system
earth leakage breaker with harmonic
countermeasure applied.
