27
Troubleshooting
Consult the following chart if the motor is not functioning properly. If the motor is still not
functioning properly after confirming the checkpoints below, contact your nearest sales
office as listed at the back of this manual.
Problem
No excitation in the
motor.
(The motor has no
holding torque and the
shaft can be turned
freely by hand.)
The motor does not
rotate.
The motor does not
rotate when a pulse
signal is input.
Measures
If the POWER LED is not On, check if the
power supply is properly connected.
When the all windings off signal is input the
motor will lose all excitation (no holding
torque). Return the all windings off signal to
“photocoupler OFF”.
Check the wiring configuration and continuity
of the connector pressure weld. If the lead
wires have been extended, check the
extension connection.
These potentiometers control the output
current to the motor (refer to pages 24, 25,
26). If they are set too low return them to the
factory set positions.
Check points
1. Is the driver POWER
LED On?
(If On, condition is normal)
2. Is the all windings off signal
being input to the driver?
3. Are the driver and motor
correctly connected?
4. Are the current adjustment
potentiometers (RUN or
STOP) set too low?
Note: If the motor still has no torque after checking the above conditions, the
driver is probably defective.
After reconfirming that the current voltage and connections are correct,
contact your nearest sales office for service.
First check the 4 items above.
5. In 2-pulse input mode
(pulse input mode
switch in the 2P position) is
either the pulse/CW pulse
or rotation direction/CCW
pulse signal input terminal
already in the “photocoupler
ON” state?
6. In 1-pulse input mode
(pulse input mode
switch in the 1P position) is
the pulse signal connected
to the rotation direction/
CCW pulse signal input
terminal?
The motor will not rotate if a pulse signal is
input when the other pulse signal input
terminal is already in the “photocoupler ON”
state.
Be sure to keep the pulse signal in the
“photocoupler OFF” state.
Connect the pulse signal to the pulse/CW
pulse signal input terminal.
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