What is a web guiding system?
A web guiding system is a closed-loop correction system for moving materials such as film, paper, foil, label stock and nonwoven webs. When the material edge, centerline or printed line drifts from the target position, the sensor sends feedback to the controller, and the actuator moves the guiding frame to correct the web path.
Main components: controller, edge sensor, actuator and guiding frame
The controller processes sensor feedback and drives the actuator. The edge sensor detects the web edge, printed line or center position. The actuator provides the correction movement. The guiding frame or correction structure transfers that movement to the web path.
Unwind guiding, process guiding and rewind guiding
Unwind guiding corrects material before it enters the machine. Process guiding keeps the web aligned through printing, coating, laminating, inspection or slitting sections. Rewind guiding helps keep the finished roll edge stable during winding.
Edge guiding vs line guiding
Edge guiding tracks one material edge. Line guiding follows a printed line, mark or contrast feature. Center guiding uses two sensor references or a center control method to keep the web centerline stable when edge position alone is not enough.
Ultrasonic, infrared and CCD sensors
Ultrasonic sensors are useful for transparent or low-contrast webs. Infrared sensors fit opaque materials with clear edge conditions. CCD and digital photoelectric sensors are used for printed lines, color edges and more difficult visual references.
Applications: label printing, slitting, laminating, coating, inspection, film, paper and nonwoven
Common applications include label printing machines, slitting rewinders, laminating lines, coating machines, inspection machines, film converting lines, paper converting lines and nonwoven production equipment.
How to choose actuator stroke and thrust
Actuator stroke should cover the expected web deviation plus a practical adjustment margin. Thrust should be selected according to frame weight, roll weight, web width, correction structure and machine speed. Compact frames may use standard actuators such as ACT01, while heavier or wider structures may require higher thrust options.