If it is advantageous to install secondary section covers, then you must select the most
suitable cover variant (segmented cover or continuous cover band). This can be evaluated
based on various criteria.
• Type of dirt/pollution
– In the case of pointed and sharp-edged pollution, such as metal chips, the continuous
cover band is the preferred choice, as it creates a smooth surface without any joints. Metal
chips can become lodged in the joints between segmented covers and result in damage.
The primary section can press dirt and pollution that can be compressed into the
segmented cover joints therefore causing them to lift o. The cover can be shifted if a high
degree of friction is created between the primary section and the cover as a result of the
dirt and pollution.
– For occasional exposure to liquids, the segmented cover oers less protection against
liquid accumulating between the cover and the secondary sections. It can be
advantageous not to use the cover in the case of substances that can attack or penetrate
the encapsulation of the secondary sections and damage the magnet material. This
allows any liquid to escape and the parts to dry.
• Length of the axis
– The length of the continuous cover band is limited. Segmented covers can be used to
cover any length of secondary section track.
– When using the continuous cover band, the motor length is extended, even when
secondary section cooling is not used, by the mounting areas at the ends of the secondary
section track.
• Installation options and installation work involved
– Installing the continuous cover band is more complex than installing the segmented
cover, as it involves exible and in most cases long sheets of metal. The length of the
individual cover segments is limited and is stabilized using lateral edge proles.
– As a result of the magnetic force of attraction, the continuous cover band must already be
aligned when coming into contact with the secondary sections for the rst time. You have
to lift it o almost completely if you want to subsequently adjust it. The segmented cover
is placed down, and it automatically aligns itself as a result of the lateral edge proles.
– If the slides have already been mounted, then the continuous cover band must always be
mounted together with the secondary sections, as it is not possible to introduce the cover
band between the primary section and secondary section.
– If the slide length is less than half the length of the secondary section track, then the
secondary sections and the covers (both continuous and segmented) must be mounted
before installing the slide.
Procedure
Mounting the continuous cover band
The procedure is valid for the following initial situation:
• The secondary section track is at least twice the length of the slide.
• The guides and the slides are mounted together with the primary section.
Installation
5.3Procedure when installing the motor
Naturally-Cooled 1FN3 Linear Motors
74 Operating Instructions, 06/2023, A5E52220465B AB
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