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9 Troubleshooting and remedial
actions
During motor operation, the motor or driver may fail to function properly due to an
improper speed setting or wiring. When the motor cannot be operated correctly, refer
to the contents provided in this section and take appropriate action. If the problem
persists, contact your nearest office.
Phenomenon
•
The motor is not
energized.
•
The motor's output
shaft can be turned
easily by hand.
The motor does not
run.
The motor rotates in
the direction opposite
that which is
specified.
Motor operation is
unstable.
Possible cause
Connection error in the motor
or power supply.
Current potentiometer
incorrectly set. If the setting is
too low, the motor torque will
also be too low and operation
will be unstable.
The all windings off input is
set to ON.
Pulse input line connection
error.
The CW input and the CCW
input came ON at the same
time.
The CW input and the CCW
input are connected in
reverse.
Motor connection error.
Current potentiometer
incorrectly set. If the setting is
too low, the motor torque will
also be too low and operation
will be unstable.
9 Troubleshooting and remedial actions
Remedial action
Check that the connections
between the driver, motor and
power supply are correct.
Return the current
potentiometer to its factory
setting and check.
Switch the all windings off
input to OFF and confirm that
the motor is excited.
•
Check the controller and
driver connections.
•
Check the pulse input
specifications (voltage and
width).
Input either the CW input or
the CCW input, and always
switch the other terminal to
OFF.
Connect the CW pulses to the
CW pulse input (pin No.1 and
2), and connect the CCW
pulses to the CCW pulse input
(pin No.3 and 4).
Check that the driver and
motor connections are correct.
Return the current
potentiometer to its factory
setting and check.
−45−
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