Web Guide System

Web Guide - applications

Slitting machines
Slitter rewinders
Printing presses
Coating machines
Laminating machines

Web guiding systems are used in the converting industry to position the substrate materials, known as webs, before processing. They are typically positioned just before a critical stage on a converting machine.

Web guiding system uses a sensor to monitor the web position for lateral tracking, and uses an actuator to move a mechanical frame to shift the running web back on course whenever the sensor detects movement away from the required path or register.

Actuators may be hydraulic or electromechanical. Non-contact reflective photocells, ultrasonic or infrared sensors are used for edge control depending on the application. The system’s control unit uses the output signals from the sensors to move the actuator.

Guiding Locations

Unwind frame Web Guide/Uncoiler
Intermediate offset pivoting or displacement Web Guide
Intermediate Steering Web Guide
Rewind frame Web Guide/Recoiler

System Operation

Web guiding systems operate at high speed, constantly making small adjustments to maintain the position of the web. Modern systems use digital technology and touch screen operator interfaces so simplify set up.

All the parameters are set by the operator control logic. The systems show the measured error on an LCD display that shows graphically and numerically the deviation values. The zero setting can be modified for moving the offset level. In the most sophisticated systems the sensor can be motorised.

The auto-center device is used for moving the edge guide in a central position in order to start a new job with the same potential correction on both the sides.

Link to Partners website: Selectra S.R.L.

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