8 Troubleshooting
L-220 Linear Actuator
MP149E
Version: 1.3
25
Problem
Possible causes
Solution
Reduced positioning accuracy Mounting nut is fastened
too tight
Tighten the mounting nut to a
maximum torque 10 Nm.
Functional impairment after
system modification
Motor controller has
been replaced
L-220 was replaced
by another model.
Motor controller from PI:
Load the parameters from the stage
database that correspond to the
combination of motor controller and L-
220 model.
Motor controller from a third-party supplier:
Check the operating parameters.
The mechanics do not move.
Cable not connected
correctly or defective
Check the connecting cable.
Lateral forces are
affecting the pusher
Lateral forces increase the friction on the
internal drive components.
Avoid lateral forces on the tip and on
the pusher of the L-220.
The mechanics do not move,
but generate operating noise.
Values for the velocity,
acceleration and/or load
are too high
Reduce the velocity.
Reduce the acceleration.
Reduce the load on the mechanical
system.
The mechanical system did not
stop in time and ran into the
limit stop
Velocity is too high
(see chapter Limit
Switches p. 9)
Limit switch is
defective
Motor controller
ignores the limit
switch signal
1.
Stop the motor.
2.
Command the mechanical system away
from the hard stop.
3.
Check the settings of the motor controller
for the limit switch processing.
For L-220.x0SD 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
stage 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. 27).
8
Troubleshooting