Linear Line EN

5 Technical Instructions

A+P/U-system tolerance compensation

Deviations in parallelism in two planes The A+P/U-system, like the V+P/U, can compensate for axial deviations in parallelism. The RP- or RU-slider allows to correct the longitudinal par allelism error and, additionally, the RA-slider can rotate in the rail, to com pensate for other deviations in parallelism, e.g. height offset. RA-sliders are built mixing guiding and floating rollers. They carry the full radial load and retain the ability to guide the payload as it travels, while being able to rotate in the rail without affecting the preload or the smooth running quality. The combination of two rails, one featuring a RA-slider and one featuring a RP- or RU-slider, can be used to absorb both axial and angular errors in the mounting surfaces.

Fig. 46

The maximum allowable rotation angle of the RA-sliders are shown in the following table 18 and figure 47. α 1 is the maximum rotation angle counterclockwise, α 2 is clockwise.

α 1 [°]

α 2 [°]

Slider type

RAG18

1

1

RA28G RDA28G RA43G RDA43G

0.85

0.85

1.3

1.3

Tab. 18

α

α

α

α 2

1

Fig. 47

α B 0min

B 0max α

B 0nom α

CR-26