Omron NJ501-1300, Руководство пользователя

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11 Troubleshooting
11-56
NJ-series CPU Unit Motion Control User’s Manual (W507)
Unstable motor rotation Incorrect wiring of Servo-
motor power line/encoder
line, missing phase, etc. Check the wiring of the
motor power line and
encoder line. Wire all connections cor-
rectly.
Load torque variation due
to gear meshing or not
tightening the coupling
eccentric screw connect-
ing the motor axis with the
mechanical system Check the machine. Turn
the coupling under a no-
load condition (with the
mechanical part after the
coupling removed). Review and adjust the
machine.
Insufficient gain adjust-
ment --- Perform auto-tuning of the
Servomotor. Manually
adjust the Servomotor
gain.
Incorrect Servomotor
selection (adjustment not
possible) Select another motor
(check the torque and
inertia ratio). Change to an optimal
motor.
Damaged Servomotor
bearings Turn OFF the Servo Drive
power supply, and also
turn ON the brake power
supply and release the
brake if the motor comes
with a brake. Then manu-
ally turn the motor output
shaft with the motor power
line disconnected
(because the dynamic
brake may be applied). Replace the Servomotor.
Broken Servomotor wind-
ing Use a tester to check the
resistance between
phases U, V, and W of the
motor power line. If the
balance is off, there is a
problem. Replace the Servomotor.
Rotation direction is
reversed. The Servo Drive is set to
the opposite rotation direc-
tion. Jog the machine. If the
rotation direction of the
Servo Drive is opposite
the jogging direction, the
rotation direction of the
Servo Drive is reversed.
Also check for reversed
feedback signals (phases
A and B) and reverse rota-
tion setting of the parame-
ter. Set the rotation direction
of the Servo Drive cor-
rectly.
(During homing)
The axis parameters that
set the polarity of the
home proximity sensor
and the polarity of the
home proximity input do
not match.
Check the axis parame-
ters and sensor polarity
again. Set the correct axis
parameters.
(During homing)
Incorrect wiring of the
home proximity input
Check the axis input infor-
mation in the Axis Vari-
ables to see if the home
proximity input sensor
turns ON/OFF. Wire the home proximity
input correctly.
Problem Cause Item to check Countermeasure