YASKAWA E-S Series User Manual

10.2 Troubleshooting Based on the Operation and Conditions of the Servo Drive
10-22
Motor Vibration
The servo gains are not
balanced.
Check to see if the servo
gains have been cor-
rectly tuned.
Execute custom tuning.
page 8-15
The setting of Pn100
(Speed Loop Gain) is too
high.
Check the setting of
Pn100. The default set-
ting is Kv = 40.0 Hz.
Set Pn100 to an appro-
priate value.
−
The setting of Pn102
(Position Loop Gain) is
too high.
Check the setting of
Pn102. The default set-
ting is Kp = 40.0/s.
Set Pn102 to an appro-
priate value.
−
The setting of Pn101
(Speed Loop Integral
Time Constant) is not
appropriate.
Check the setting of
Pn101. The default set-
ting is Ti = 20.0 ms.
Set Pn101 to an appro-
priate value.
−
The setting of Pn103
(Moment of Inertia Ratio)
is not appropriate.
Check Pn103 (Moment
of Inertia Ratio).
Set Pn103 (Moment of
Inertia Ratio) to an
appropriate value.
−
Large Motor
Speed
Overshoot on
Starting and
Stopping
The servo gains are not
balanced.
Check to see if the servo
gains have been cor-
rectly tuned.
Execute custom tuning.
page 8-15
The setting of Pn100
(Speed Loop Gain) is too
high.
Check the setting of
Pn100. The default set-
ting is Kv = 40.0 Hz.
Set Pn100 to an appro-
priate value.
−
The setting of Pn102
(Position Loop Gain) is
too high.
Check the setting of
Pn102. The default set-
ting is Kp = 40.0/s.
Set Pn102 to an appro-
priate value.
−
The setting of Pn101
(Speed Loop Integral
Time Constant) is not
appropriate.
Check the setting of
Pn101. The default set-
ting is Ti = 20.0 ms.
Set Pn101 to an appro-
priate value.
−
The setting of Pn103
(Moment of Inertia Ratio)
is not appropriate.
Check Pn103 (Moment
of Inertia Ratio).
Set Pn103 (Moment of
Inertia Ratio) to an
appropriate value.
−
Position
Deviation
(without Alarm)
The Encoder Cable does
not satisfy specifications.
Check the Encoder
Cable to see if it satisfies
specifications.
Use cables that satisfy
the specifications.
−
There is excessive exter-
nal noise interference on
the Encoder Cable.
Check to see if the
Encoder Cable is bun-
dled with a high-current
line or installed near a
high-current line. Check
to see if there is noise
interference on the signal
line from the encoder.
Correct the cable layout
so that no surge is
applied by high-current
lines. Take measures to
prevent noise interfer-
ence from the signal lines
on the encoder cable.
−
There is variation in the
FG potential because of
the influence of
machines on the Servo-
motor side, such as a
welder.
Check to see if the
machines are correctly
grounded.
Properly ground the
machines to separate
them from the FG of the
encoder.
−
The encoder was sub-
jected to excessive
vibration or shock.
Check to see if vibration
from the machine
occurred. Check the Ser-
vomotor installation
(mounting surface preci-
sion, securing state, and
alignment).
Reduce machine vibra-
tion. Or, improve the
mounting conditions of
the Servomotor.
−
The coupling between
the machine and Servo-
motor is not suitable.
Check to see if position
offset occurs at the cou-
pling between machine
and Servomotor.
Correctly secure the cou-
pling between the
machine and Servomo-
tor.
−
Continued on next page.
Continued from previous page.
Problem Possible Cause Confirmation Correction Reference

YASKAWA E-S Series Specifications

General

Brand	YASKAWA
Model	E-S Series
Category	Servo Drives
Language	English