Omron ACCURAX G5 User Manual page 505

Symptom Probable cause
The motor does The torque command is
not rotate even if disabled.
commands are
The CW input and CCW
input from the
input are ON at the same
controller.
time.
(Continued from
previous page)
Servo Drive is faulty.
The motor operates The motor power cable is
momentarily, but wired incorrectly.
then it does not
The encoder cable is wired incorrectly. Check the encoder cable's wiring.
operate after that.
The motor rotates The command pulse input is
without a incorrect.
command.
Servo Drive is faulty.
The motor rotates in The CW input and CCW
the reverse direction input connections are
from the command. reversed.
Motor rotation is The motor power cable or
unstable. encoder cable is wired
incorrectly.
The coupling system between the
motor shaft and the mechanical
system has eccentricity or loose
screws, or the load torque is
fluctuating due to engagement
between pulleys or gears.
The load's moment of inertia
exceeds the Servo Drive's
allowable value.
The pulse signal line's
connections are loose.
The gain is wrong.
The CN1 input signal is
chattering.
The motor is The ambient temperature is
overheating. too high.
Ventilation is obstructed.
The motor is overloaded.
The motor is vibrating.
Accurax G5 AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Items to check
Check if the torque command input
method is correct.
Check the command pulse's wiring.
−
Check the wiring of the motor power
cable's phases U, V, and W.
Check the command pulse type.
Check the command pulse's voltage. Connect a resistor that
−
Check the controller's command
pulse type and the Servo Drive's
command pulse type.
Check the wiring of the motor power
cable's phases U, V, and W and
check the encoder cable's wiring.
Check the mechanical system's
coupling section.
Try rotating the motor without a load.
(Disconnect it from the mechanical
system.)
Try rotating the motor without a load.
(Disconnect it from the mechanical
system.)
Check the pulse signal line's wiring
at the controller and Servo Drive.
Check the controller's command
pulse type and the Servo Drive's
command pulse type.
−
Check the operation command (RUN),
error counter reset (ECRST), zero speed
designation (VZERO), internally set
speed selection 1 (VSEL1) and internally
set speed selection 2 (VSEL2).
Check that the ambient temperature
around the motor is 40°C or less.
Check to see whether anything is
blocking ventilation.
Try rotating the motor without a load.
(Disconnect it from the mechanical
system.)
11-4 Troubleshooting
Measures
Set the torque command
correctly.
· Input the pulse signal either to
the CW input or CCW input.
· Always turn OFF the
terminal that is not input to.
Replace the Servo Drive.
Wire correctly.
Wire correctly.
Set the correct command pulse input.
matches the voltage.
Replace the Servo Drive.
Connect the CW pulse signal
to the CW input and the CCW
pulse signal to the CCW input.
Wire correctly.
Review and adjust the
machine.
· Reduce the load.
· Replace the Servomotor
and Servo Drive with
higher capacity models.
Wire correctly.
Set the Servo Drive's pulse
type to match the controller's
command pulse type.
Perform manual tuning.
Wire correctly so that there is
no chattering.
Lower the ambient temperature
around the motor to 40°C or
less. (Use a fan or air
conditioner.)
Improve ventilation.
· Reduce the load.
· Replace the Servomotor
and Servo Drive with
higher capacity models.
11-19
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