Guiding methods - Position

Untreated material webs can by guided by the web edge only as there are no other regular contrast differences available.

Treated webs, however, may 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. or by the r.h. web edge.

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Manual sensor positioning - center line guidance

Web guiding by the mean center line of the web / of the machine.

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Motorized sensor positioning by the web edge

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

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Motorized sensor positioning by the centerline - symmetric

Guiding by the mean web center line / machine center line with symmetric sensor follow-up (hybrid control).

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Lamination by web edge with one positioning support

Lamination of two differen webs by the web edges with the assistance of a positioning support and with litte distance between the scanning position on the master and the scanning position on the slave.

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Lamination by the web edge with two positioning supports

Lamination of two webs by the web edges with two positioning supports/CCD cameras with a bigger space between the scanning position on the master and the scanning position on the slave.

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Lamination by the web center line with two positioning supports

Lamination of two webs by the centerline of the webs using two positioning supports/two CCD cameras.

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Web oscillation - motorized

Periodic oscillation of the web by motorized shifting of the edge sensor.

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Web oscillation within the sensor measuring range

Periodic web oscillation by shifting the position target value within the measuring range of the edge sensor.

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Web width measurement

Web width measurement by capturing both web edges, motorized positioning support.

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Erhardt+Leimer Inc. / Products / Web Guiding and Spreading systems for textiles ELSMART / Guiding methods - Position