In the converting industry, a web is a continuous roll of a thin, flat material such as paper, film or plastic.
Sensors developed for Web Guiding applications in the Converting Industry may be pneumatic, photoelectric, ultrasonic, or infrared.
The system’s controls must process the output signals from the sensors in to a form that can drive an actuator.
Many controls today are electronic, typically using an amplifier to convert signals from the sensor, then commanding a special servo motor incorporating a lead or ball screw for guiding actuation.
Pneumatic servo controllers are considered explosion-proof, especially in dusty or contaminated environments.