PI U--651 Series, User Manual

Page: 22 / 51

5 Installation
18 Version: 1.3.0 MP136E U­651 Rotation Stage
Tools and accessories

Suitable protective earth conductor: Cross-sectiona l area of the cable ≥0.75 mm
2

M4 screw set supplied for connecting the protective earth conductor (p. 10)

Suitable screwdriver
Connecting the U­651 to the protective earth conductor
1. If necessary, attach a suitable cable lug to the protective earth conductor.
2. Use the M4 screw (together with the flat and lock washers) to attach the cable lug of
the protective earth conductor to the threaded hole in the U-651 as shown in the
profile view.
3. Tighten the M4 screw with a torque of 1.2 Nm to 1.5 Nm.
4. Make sure that the contact resistance at all connection points relevant for connecting
the protective earth conductor is <0.1 Ω at 25 A.
5.3 Mounting the U­651 onto a Surface
NOTICE
Warping the base body!
Incorrect mounting can warp the base body. A warped base body will increase wear and
reduce accuracy.

Mount the U-651 onto a flat surface. The recommended flatness of the surface is 10 µm.

For applications with large temperature changes:
Only fix the U-651 to surfaces that have the same or similar thermal expansion properties
as the U-651 (e.g., surfaces made of aluminum).
INFORMATION
The positive direction of motion of the U-651 is shown in the product view (p. 8).