PI L-402 Series, User Manual, Page: 28 / 43

8 Troubleshooting
24 Version: 1.2.0 MP164E L-402 Mniature Stage
Problem Possible causes Solution
Mechanical system does not
move; no operating noise can
be heard.
Controller not correctly
connected or defective.

Check all connecting cables.

Check the controller.
Axis motion error. Motion error = The difference between the
current position and the commanded position
exceeds the specified maximum value in
closed-loop operation. For example, motion
errors can be caused by malfunctions of the
drive or the position sensor of the positioner.
1.
Read out the error code of the controller in
the PC software. If there is a motion error,
error code -1024 is output.
2. Check your system and make sure that all
axes can be moved safely.
3. Switch on the servo mode for the affected
axis in the PC Software.
For details, see the user manual of the
controller.
Motion platform has
triggered the limit
switch.
If you use a controller from PI:
1.
Switch on the servo mode for the affected
axis again in the PC software.
2. Command an axis motion away from the
limit switch in the PC software.
For L-402.10SD models: Actual
position deviates from the
displayed position.
The motor is overloaded
by an external load
torque or the mass to be
driven in the case of
strong acceleration or
deceleration.
The motor skips steps. The information on the
current position is lost without the controller
detecting the state.

Determine the maximum velocity for a
positioner with a stepper motor in the
application.

Start a new reference move.
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. 25).