10
9. Notes on Use
9.1 Restrictions on Operating Condition and Installation Position
z
Never perform push-motion operation, as it will cause the magnetic coupling to lose alignment.
z
Use the actuator horizontally. It cannot be installed vertically or on its side.
9.2 Precision
This actuator adopts a structure whereby the pipe and slider slide against each other via a wear ring and
make connection by means of magnetic force. Accordingly, its hysteresis is much greater than what is
usually expected on general ball-screw type actuators. Therefore, use this actuator properly by giving full
consideration to its characteristics.
Particularly when the actuator is used for positioning from different directions, the effect of lost motion
must be considered.
•
Positioning
repeatability: Within
±
0.08 mm
•
Lost motion:
0.5 mm max.
9.3 Duty
During continuous operation, the actuator generates frictional heat due to sliding of the pipe over the wear
ring.
Since higher pipe temperatures reduce the clearance between the pipe and wear ring, shorten the
actuator life or cause other unwanted conditions, use the actuator at a duty of 50% or below.
Duty (%) = Operating time / (Operating time + Stopped time) x 100
9.4 Moment
Load
The guides use slide bushes made of special resin.
Because of these bushes, application of moment load can sometimes cause vibration or increase the slide
resistance due to scoring, leading to shorter life of guides, reduced loading capacity, drop in speed, or
other unwanted conditions.
To avoid these conditions, use the actuator in such a way that during movement the actuator does not
receive any moment load in the Mb or Mc direction and that whatever load applied is distributed uniformly
over the slider.
•
Allowable overhang length: 200 mm (Ma direction only)
•
Allowable static moment:
20.4 N
⋅
m
Mb/Mc directions
Ma direction
Summary of Contents for RCP2W
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