11-1
Section
Troubleshooting Tables
281
No.
Remedy
Items to check
Probable causes
Problem
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
insufficient. (The gain is too
high.)
---
Perform autotuning.
Manually adjust
(decrease) the gain.
43
The wrong Servo Motor is
selected (so it cannot be
adjusted).
Check the torque and inertia
ratings and select another
Servo Motor.
Change to a suitable
Servo Motor.
44
There is eccentricity in the
couplings connecting the
Servo Motor axis and the
mechanical system.
---
Adjust the mounting of
the Servo Motor and
machinery.
45
Vibration is
occurring at the
same frequency as
the application
frequency.
Inductive noise is being
generated.
Check whether the Servo Drive
control signals are too long.
Check whether the control
signal lines and power lines are
bundled together.
Shorten the control
signals.
Separate the control
signal lines and the
power lines.
Use a low-impedance
power supply for the
control 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
insufficient. (The gain is too
low.)
---
Perform autotuning.
Manually adjust
(increase) the gain.
49
The gain cannot be adjusted
because the mechanical
rigidity is too weak.
This particularly tends to occur
in systems with vertical axes,
scalar 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-viscosity statical
friction).
---
Perform autotuning.
Manually adjust the gain.
51
The wrong Servo Motor is
selected (so it cannot be
adjusted).
Check the torque and inertia
ratings and select another
Servo Motor.
Change to a suitable
Servo Motor.
52
The Servo Motor or the
Servo Drive is defective.
---
Replace the Servo Motor
or the Servo Drive.
Summary of Contents for CS1W-NC113 - REV 02-2008
Page 1: ...CS1W NC113 213 413 133 233 433 Position Control Units ...
Page 2: ...iv ...
Page 4: ...vi ...
