PI U--651 Series, Руководство пользователя

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8 Troubleshooting
U­651 Rotation Stage MP136E Version: 1.3.0 31
Problem Possible causes Solution
Noise during operation Uncontrolled
oscillation of the U-651

Immediately switch off the servo control
system of the affected axes.

Check the settings of the servo control
parameters.
Inaccurate positioning Settling window
around the target
position is too large

Reduce the settling window by changing
the parameter values for the settling
window limits on the controller. Refer to
the controller manual (p. 3) for details.
Reaching the target
position takes too long
Settling window
around the target
position is too small

Enlarge the settling window by changing
the parameter values for the settling
window limits on the controller. Refer to
the controller manual (p. 3) for details.
Increased wear Warped base body

Mount the U-651 onto a flat surface. The
recommended flatness of the surface is
10 µm.

For applications with large temperature
changes:
Only mount the U-651 on surfaces that
have the same or similar thermal
expansion properties as the U-651 (e.g.,
surfaces made of aluminum).
Reduced accuracy
No or limited motion Excessive load

Reduce the load (see "Data Table"
(p. 35)).

When the rotation stage is mounted
vertically, make sure that the installed
load is lower than the maximum torque
of the drive (p. 35).
The default parameter
values are not suitable
for operating with high
loads

Adjust the operating parameters
according to the description in "Starting
and operating the U-651".
The default parameter
values are not suitable
if the overall cable
length exceeds 3 m

Adjust the operating parameters
according to the description in
"Adjusting Parameter Values when Using
Extension Cables" (p. 27).
If the problem that occurred with your system is not listed in the table above or cannot be
solved as described, contact our customer service department (p. 33).
8 Troubleshooting