Omron CJ1W-C113 - REV 02-2008, Operation Manual

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Troubleshooting Tables Section 11-1
41 There are unusual
noises. The machinery is vibrating. Check for foreign objects in the
machinery’s moving parts, and
inspect for damage, deformation,
and looseness. Make any necessary
repairs.
42 The speed loop gain is insuffi-
cient. (The gain is too high.) --- Perform autotuning.
Manually adjust
(decrease) the gain.
43 The wrong Servomotor is
selected (so it cannot be
adjusted). Check the torque and inertia rat-
ings and select another Servo-
motor. Change to a suitable Ser-
vomotor.
44 There is eccentricity in the
couplings connecting the Ser-
vomotor axis and the mechan-
ical system. --- Adjust the mounting of
the Servomotor and
machinery.
45 Vibration is occur-
ring at the same fre-
quency as the
application fre-
quency. Inductive noise is being gen-
erated. Check whether the Servo Drive
control signals are too long.
Check whether the control signal
lines and power lines are bun-
dled together.
Shorten the control sig-
nals.
Separate the control sig-
nal lines and the power
lines.
Use a low-impedance
power supply for the con-
trol signal lines.
46 The control signals are not
properly grounded. Check whether the control signal
shield is properly grounded at
the Servo Drive.
Check whether the control signal
lines are in contact with the
ground.
Correct the wiring.
47 Twisted-pair or shielded cable
is not being used between the
PCU and the Servo Drive. Check whether twisted-pair
cables are used for the pulse
signals, and whether the cables
are shielded. Use twisted-pair and
shielded cable as in the
wiring examples.
48 The motor axis is
vibrating unsteadily. The gain adjustment is insuffi-
cient. (The gain is too low.) --- Perform autotuning.
Manually adjust
(increase) the gain.
49 The gain cannot be adjusted
because the mechanical rigid-
ity is too weak. This particularly tends to occur in
systems with vertical axes, sca-
lar robots, palletizers, and so on,
which place a torsion load on the
axes. Increase the mechanical
rigidity.
Re-adjust the gain.
50 The mechanical structure is
producing stick slip (high-vis-
cosity statical friction). --- Perform autotuning.
Manually adjust the gain.
51 The wrong Servomotor is
selected (so it cannot be
adjusted). Check the torque and inertia rat-
ings and select another Servo-
motor. Change to a suitable Ser-
vomotor.
52 The Servomotor or the Servo
Drive is defective. --- Replace the Servomotor
or the Servo Drive.
No. Problem Probable causes Items to check Remedy