BECKHOFF AL2000 Application - Manual (Page 17)

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17
Bearings
To assure a free movement the slide should be provided with robust bearings that run smoothly on two rails.
The rails are mounted aside the magnetplate. This construction ensures the right airgap between the coil unit
and the magnet plate. For the sideward positioning of the coil unit to the magnetplates a small tolerance is ac-
ceptable.
The coil unit contains iron parts which are strongly attracted by the permanent magnets of the magnet plate
whether or not the motor is electrically propelled. This attraction force should continuously be beared by the
linear bearings. Therefore it is important to take the attraction force into account when dimensioning the bear-
ings.