12.5 Troubleshooting Based on the Operation and Conditions of the Servomotor
12-62
Abnormal
Noise from
Servomotor
The Servomotor vibrated
considerably while perform-
ing the tuning-less function
with the default settings.
Check the waveform of
the motor speed.
Reduce the load so
that the moment of
inertia ratio or mass
ratio is within the allow-
able value, or increase
the load level or reduce
the rigidity level in the
tuning-less level set-
tings.
If the situation is not
improved, disable the
tuning-less function
(i.e., set Pn170 to
n.0) and execute
autotuning either with
or without a host refer-
ence.
page 8-12
The machine mounting is not
secure.
Turn OFF the power sup-
ply to the servo system.
Check to see if there are
any loose mounting
screws.
Tighten the mounting
screws.
–
The machine mounting is not
secure.
Turn OFF the power sup-
ply to the servo system.
Check to see if there is
misalignment in the cou-
pling.
Align the coupling.
–
Turn OFF the power sup-
ply to the servo system.
Check to see if the cou-
pling is balanced.
Balance the coupling.
–
The bearings are defective.
Turn OFF the power sup-
ply to the servo system.
Check for noise and
vibration around the bear-
ings.
Replace the Servomo-
tor.
–
There is a vibration source at
the driven machine.
Turn OFF the power sup-
ply to the servo system.
Check for any foreign
matter, damage, or defor-
mation in the machine’s
moving parts.
Consult with the
machine manufacturer.
–
Noise interference occurred
because of incorrect I/O sig-
nal cable specifications.
Turn OFF the power sup-
ply to the servo system.
Check the I/O signal
cables to see if they sat-
isfy specifications. Use
shielded twisted-pair
cables or screened
twisted-pair cables with
conductors of at least
0.12 mm
2
(stranded wire).
Use cables that satisfy
the specifications.
–
Noise interference occurred
because an I/O signal cable
is too long.
Turn OFF the power sup-
ply to the servo system.
Check the lengths of the
I/O signal cables.
The I/O signal cables
must be no longer than
3 m.
–
Continued on next page.
Continued from previous page.
Problem Possible Cause Confirmation Correction Reference
To Next Page
Loading...
