PI N--472 10 Series, Руководство пользователя, Страница: 31 / 57

6 Startup and Operation
N­472 Linear Actuator MP144E Version: 1.3.0 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-472.

Do not unscrew the fine-threaded screw from the base body of the N-472.
NOTICE
Fine­threaded screw gets stuck!
The N-472'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-472 after reaching the end of the travel range or command motion away from
the end of the travel range.

If the N-472'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
The N-472 is a linear actuator without reference point or limit switch. Therefore, a reference
move to the reference switch or limit switch is not possible. However, you can determine a
reference position (p. 29) manually and perform positioning moves relative to this reference
position.
INFORMATION
The inertia drive generates noise in step mode. The noise generation depends on the current
step frequency.