9 Troubleshooting and remedial actions
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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
Possible cause
Remedial action
Connection error in the motor
or power supply.
Check that the connections
between the driver, motor and
power supply are correct.
Current potentiometer
incorrectly set. If the setting is
too low, the motor torque will
also be too low and operation
will be unstable.
Return the current
potentiometer to its factory
setting and check.
•
The motor is not
energized.
•
The motor’s output
shaft can be turned
easily by hand.
The all windings off input is
set to ON.
Switch the all windings off
input to OFF and confirm that
the motor is excited.
Pulse input line connection
error.
•
Check the controller and
driver connections.
•
Check the pulse input
specifications (voltage and
width).
The motor does not
run.
The CW input and the CCW
input came ON at the same
time.
Input either the CW input or
the CCW input, and always
switch the other terminal to
OFF.
The motor rotates in
the direction opposite
that which is
specified.
The CW input and the CCW
input are connected in
reverse.
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).
Motor connection error.
Check that the driver and
motor connections are correct.
Motor operation is
unstable.
Current potentiometer
incorrectly set. If the setting is
too low, the motor torque will
also be too low and operation
will be unstable.
Return the current
potentiometer to its factory
setting and check.
