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Symptom
Probable cause
Vibration is
Inductive noise is occur-
occurring at the
ring.
same frequency
as the power
supply.
The position is
There is an error in the
misaligned.
coupling of the mechanical
(Position mis-
system and the Servomo-
alignment occurs
tor.
without an alarm
Noise is entering the Devi-
being output.)
ation Counter Reset Input
(ECRST).
The gain is does not
match.
The load inertia is too
large.
Items to check
Check whether the Servo Drive
control signal lines are too long.
Check whether control signal lines
and power supply lines are bundled
together.
Check whether the coupling of the
mechanical system and the Servo-
motor is misaligned.
Check whether the control signal
lines and power supply lines are
bundled together.
According to load (non-load is in-
cluded), adjust an inertia ratio and
a gain to a suitable value from fac-
tory setting.
Check the following:
• Check whether the load is too
large.
• Check whether the rotation speed
of the Servomotor is too high.
8-3 Troubleshooting
Countermeasures
Shorten the control signal
lines.
• Separate control signal
lines from power supply
lines.
• Use a low-impedance
power supply for control
signals.
Couple the mechanical sys-
tem and the Servomotor cor-
rectly.
Take measures against
noise, such as separating
the control signal lines and
power lines.
• Use autotuning.
• Perform manual tuning.
• Adjust the gain.
• Review the load condi-
tions, and replace the Ser-
vomotor and Servo Drive
with appropriate models.
8-16
8
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Chapters
Troubleshooting
