Troubleshooting and remedial actions
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10 Troubleshooting and remedial actions
If the lineard motor or driver does not operate correctly during actuator operation, take appropriate actions by
referring to the information provided in this chapter. If the problem persists, contact your nearest Oriental Motor
office.
10-1
If the ALARM LED is not blinking
If the lineard motor does not operate properly even though the ALARM LED is not blinking, refer to the table below:
Phenomenon
Possible cause
Remedial action
•
The lineard motor is not
excited.
•
The rack can be turned
with the hands.
C.OFF input is ON.
Turn the C.OFF input to “OFF” and confirm that
the lineard motor is excited.
•
The rack does not move.
•
The rack cannot be moved
by hand.
Bad connection for DIR.-A or DIR.-B
input.DIR.
•
Check the connections of the controller and
driver.
•
Review the specifications (voltage and width)
for the input pulse.
In 2-pulse input mode, the DIR.-A
and DIR.-B inputs are both ON at
the same time.
Input the pulse signal either to the DIR.-A or
DIR.-B input. Make sure the terminal with no
input is set to OFF.
In 1-pulse input mode, the pulse
signal DIR.-A is connected to the
DIR.-B input.
Connect the pulse signal DIR.-A to the DIR.-A
input.
Electromagnetic brake is holding
(electromagnetic brake lineard
motor only).
Release the electromagnetic brake by turning
the power on.
The rack moves in the
direction opposite that
which is specified.
When 2-pulse input mode is
selected, the DIR.-A and DIR.-B
inputs are connected in reverse.
Connect the CW pulse input to the DIR.-A input
and CCW pulse input to DIR.-B input.
When 1-pulse input mode is
selected, the DIR.-B input is set in
reverse.
Set the DIR.-B input so that it turns ON when
the motor moves to left or downward, and
turns OFF when the motor moves to right or
upward.
Rack operation is unstable.
The current setting switch is not set
correctly.
If the set current is small, the output torque
also becomes small, resulting in unstable
operation. Reset the current setting switch on
the driver to “F” (factory setting), and check the
operation.
Bad connection of the pulse signal.
•
Check the connections of the controller and
driver.
•
Review the specifications (voltage and width)
for input pulse.
The starting pulse speed is too
high.
Set a lower starting pulse speed at which the
motor can be started reliably.
The acceleration (deceleration)
time is too short.
Set a longer acceleration (deceleration) time at
which the motor can be started stably.
Effect of noise.
Check the operation by connecting only the
lineard motor, driver and controllers needed
for operation. If effect of noise is confirmed,
take an appropriate action such as isolating
the motor from the noise source, redoing the
wiring or changing the signal cables to
shielded wires.
