System information

Function

With follow-up control, the sensor and tool are mounted jointly on a linear guide. Here, the sensor detects the position of the web and thus determines the actual position value of the tool.

This is compared with the target value and is output to the actuator as a correction signal. Through position control or follow-up control, the tool is always followed up with a constant distance to the guide reference.

Area of use

Follow-up controllers are used when processes such as coating or cutting must be executed with a constant distance to the web edge or a guide reference on the web.

Application

The highest accuracy in position control is reached when the sensor and tool (doctor blade limitation) can be assembled in compact form on a linear unit. Edge detection always takes place in front of the tool, in the direction of web travel.

Legend

1 = Doctor blade edge limit | 2 = Doctor blade | 3 = Linear unit | 4 = Edge sensor | AB = Operating width | L1 = Distance between web edge and coating

Web guiding systems

Linear guiding system VGB14

Linear positioning and follow-up system for spatulas, suction nozzles, cutting units, marking devices, and edge lifters, designed for a nominal load of 1,000 N

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Linear guiding system VSB50

Linear positioning and follow-up system for spatulas, suction nozzles, cutting units, marking devices, and edge lifters, designed for a nominal load of 250 N

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Linear guiding system VSB60

Linear positioning and follow-up system for spatulas, suction nozzles, cutting units, marking devices, and edge lifters, designed for a nominal load of 500 N

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System components

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Infrared edge sensor PoE FR 54

Infrared edge sensor based on the principle of retroreflection with a measuring range of ±10 mm and a resolution of 0.02 mm

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Infrared wide band sensor PoE FR 61

Infrared wide band sensor with large measuring range of 160 mm, 320 mm or 480 mm

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Blue light wide band sensor PoE FR 65

Blue light transmitted light sensor with large measuring range of 160 / 320 and 480 mm

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Color line sensor FE 52

Digital color matrix sensor for detection of color lines and color contrasts

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Command station DO 42

Visualization and operation of web guiding systems with multiple operation of up to 255 web guiding control loops

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Data network center DN 40

Data network center for central connection of all components in a control system

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