Omron R88D-GT series, Руководство пользователя

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8-18
8-3 Troubleshooting
8
Troubleshooting
The Servomotor
is producing
unusual noises or
the machine is
vibrating.
There are problems with
the machine’s installation.
Check whether the Servomotor’s
mounting screws are loose. Tighten the mounting
screws.
Check whether the axes are
misaligned in the mechanical
coupling system.
Align the mechanical
couplings.
Check whether the coupling is
unbalanced. Adjust the coupling’s
balance.
There is a problem with the
bearings. Check for noise or vibration around
the bearings. Contact your OMRON
representative.
The gain is wrong. ---
• Use normal mode
autotuning.
• Adjust the gain manually.
The Speed Feedback Filter
Time Constant (Pn13) is
wrong.
Check the setting of Pn13.
Return the setting to 0
(default) or increase the
setting.
Noise is entering the
Control I/O Cable because
the cable does not meet
specifications. Check that the cable wire is a
twisted-pair wire or shielded
twisted-pair cable with wires of at
least 0.08 mm
2
.
Use Control I/O Cable that
meets specifications.
Noise is entering the Con-
trol I/O Cable because the
cable is longer than the
specified length.
Check the length of the Control I/O
Cable. Shorten the Control I/O
Cable to 3 m or less.
Noise is entering the cable
because the Encoder
Cable does not meet
specifications.
Check that the cable wires are
shielded twisted-pair wires that are
at least 0.12 mm
2
.
Use Encoder Cable that
meets specifications.
Noise is entering the
Encoder Cable because
the cable is longer than the
specified length.
Check the length of the Encoder
Cable. Shorten the Encoder Cable
to less than 50 m.
Noise is entering the signal
wires because the Encoder
Cable is stuck or the sheath
is damaged.
Check the Encoder Cable for cuts
or other damage. Correct the Encoder Cable’s
pathway to prevent damage.
Too much noise is entering
the Encoder Cable.
Separate the Encoder Cables far
from high-current lines or check
whether the lines are too close. Install the Encoder Cable
where it won’t be subjected
to surges.
The FG’s potential is fluctu-
ating due to devices near
the Servomotor, such as
welding machines. Check for ground problems (loss of
ground or incomplete ground) at
equipment such as welding
machines near the Servomotor. Ground the equipment
properly and prevent
currents from flowing to the
encoder FG.
Errors are being caused by
excessive vibration or
shock on the encoder.
There are problems with mechani-
cal vibration or motor installation
(such as the mounting surface,
attachment, or axial offset).
Reduce the mechanical
vibration or correct the
Servomotor’s installation.
The machine and the
Servomotor are resonating. Check whether the machine is
resonating.
• Readjust the Torque
Command Filter Time
Constant.
• If there is resonance, set
the Notch Filter 1
Frequency (Pn1D) and
Notch Filter 1 Width
(Pn1E).
Symptom Probable cause Items to check Countermeasures