9 Troubleshooting and remedial actions
−
46
−
Phenomenon
Possible cause
Remedial action
The centers of the motor’
output shaft and load shaft are
not aligned.
Check the connection
condition of the motor output
shaft and load shaft.
The load or load fluctuation is
too high.
Check for large load
fluctuations during motor
operation. If adjusting the
motor’s operating speed to
low and high torque eliminates
the problem, it is necessary to
review the load conditions.
The speed of the starting
pulse is too high.
Lower the speed of the
starting pulse.
The acceleration
(deceleration) time is too
short.
Lengthen the acceleration
(deceleration) time.
Loss of
synchronization
during acceleration or
running.
Electrical noise
Check running with only the
motor, driver and required
controller. If the impact of
noise is recognized, take
countermeasures, such as
rewiring for greater distance
from the noise source,
changing the signal cables to
shielded wire, or mounting a
ferrite core.
Wrong step angle settings.
Check the settings of the step
angle setting switches.
Motor does not move
the set amount.
Pulse output count is too low
or too high.
Check whether or not the
number of pulses required for
operation at the set step angle
are being output.
Current does not drop
when the motor stops.
The all windings off input is
set to ON.
Switch all windings off input to
OFF.