Control loop

Each control automation is based on a simple control loop. Even complicated tasks may be reduced to such a control loop.

Web position

Starting point is the actual web position

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Sensors

A sensor detects the actual position of a web without physical contact. Depending on the task and on the state of the material an infrared sensor, an ultrasonic sensor or a line sensor will be used.

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Position controller

The controller compares the actual value of the web position with the target value and sends an appropriate correction signal to the actuator.

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Actuators

The actuator corrects the web run. Depending on the material handled and on the application the actuator may be a pivoting frame, a steering roller system or a linear drive for a reel station.

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