PI N-470.110, Руководство пользователя, Страница: 31 / 53

6 Startup and Operation
N­470 Linear Actuator MP125E Version: 1.2.0 27
NOTICE
Increased wear due to friction!
Increased friction on the contact surface between the ball tip and the movable part of the
mechanical mounting increases wear.

Make sure that the contact surface of the mechanical mounting has a roughness of R
a
<0.1 µm and a hardness of at least 500 HV (corresponds to hardened steel).

Optional: Decrease the friction by applying a small amount of lubricant to the contact
surface of the mechanical mounting.
NOTICE
Damage to the fine­threaded screw from contact with hard objects!
Contact with hard objects can damage the thread of the fine-threaded screw. A damaged
thread can lead to the failure of the linear actuator.

Prevent the fine-threaded screw from coming into contact with hard objects.
NOTICE
Damage from unscrewing!
Completely unscrewing the fine-threaded screw from the base body leads to damage to the
N-470.

Do not unscrew the fine-threaded screw from the base body of the N-470.
NOTICE
Fine­threaded screw gets stuck!
The N-470's fine-threaded screw can get stuck at the physical end of the travel range (hard
stop or circlip). Getting stuck can reduce the lifetime of the linear actuator.

Stop the N-470 after reaching the end of the travel range or command motion away from
the end of the travel range.

If the N-470's fine-threaded screw gets stuck at the end of the travel range: Turn the head
of the fine-threaded screw by hand to loosen it.
INFORMATION
Temperature changes lead to a change in the length of the N-470's material. Depending on the
application, drift compensation may be required to keep the position stable in the case of
larger temperature fluctuations.
Possible compensatory measures are:
 Reducing the transfer of heat by adapting the drive's duty cycle
 Monitoring the temperature with a sensor (air conditioning or cooling)
Reduce the measuring period if the above-mentioned compensatory measures are not
possible.