Linear units with spindle drive LES 4, 5, 6
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April 2019
2
Installation instructions and overview of functions
Firstly, this section provides an overview of the mechanical structure, installation or assembly of the
linear units and a description of their functions.
The instructions for commissioning/parameterising the axle system and its programming by users
depend on the motors used and the relevant controllers with output stages; they can be found in their
documentation.
2.1
Functions
The LES series linear units (spindle drive) have a modular design.
These linear units are based on linear guide rails (LFS) and appropriate guide slides (FS), a ballscrew
drive and motor module (optional).
The linear guide rails made by isel consist of rigid aluminium profiles with precision steel shafts.
Isel FS guide slides are based on rolling steel balls on steel inserts and precision shafts guided
through aluminium profiles. Four ballscrews are used in each FS guide slide. The recirculating balls
are glass-fibre reinforced.
Ballscrew drives transform rotational movement into linear movement. They consist of a ballscrew
spindle (6), the ballscrew nuts (7) with ball recirculation system (1) and the balls (4) as rolling
elements. The balls establish the connection between the spindle and the nuts by rolling in the tracks
of the ballscrew spindle and the ballscrew nuts. Isel ballscrew nuts circulate several times with internal
ball recirculation. Set screws (3) enable the balls to circulate on the spindles without slack.
