Omron R88D-KTA5L User Manual page 585

Symptom Probable cause
The motor does not The torque command is
rotate even if disabled.
commands are input
The CW input and CCW input
from the controller.
are ON at the same time.
(Continued from
previous page)
The Servo Drive has broken
down.
The Servomotor The Servomotor power cable is
operates wired incorrectly.
momentarily, but then
The encoder cable is wired incorrectly.
it does not operate
after that.
The Servomotor The command pulse input is
rotates without a incorrect.
command.
The Servo Drive has broken
down.
The Servomotor rotates The CW input and CCW input
in the reverse direction connections are reversed.
from the command.
Motor rotation is The Servomotor 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 Servomotor is The ambient temperature is too
overheating. high.
Ventilation is obstructed.
The Servomotor is overloaded. Try rotating the motor without a load.
The Servomotor vibrates during
rotation.
OMNUC G5-SERIES 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 Servomotor
power cable's phases U, V, and W.
Check the encoder cable's wiring.
Check the command pulse type.
Check the command pulse's voltage.
−
Check the controller's command pulse
type and the Servo Drive's command
pulse type.
Check the wiring of the Servomotor
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.
(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.
Connect a resistor that 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 Servomotor 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.
11-24
11