Modes of position control

Untreated webs can only be guided by their edge as the web does not show any other regular differences in contrast.

Treated webs can be guided by a printed line, a color contrast, a water mark or by any other freely selectable contrast.

Manual sensor positioning by the web edge

Web guiding by the l.h. and r.h. web edge.

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Web guiding by the web centerline.

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Web guiding by a printed line or by web contrasts.

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Web guiding by the l.h. or r.h. web edge.

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Web guiding by the mean centerline with symmetric sensor follwo-up.

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Web guiding by a printed line or by web contrasts.

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