Detail
What is a unwind or rewind web guiding (EPC) system?
The system automatically detects and corrects lateral web deviation at the unwinding or rewinding section of a production line. Using sensor, controller and a servo-driven steering mechanism, the system ensures stable web alignment, improves process reliability, and produces straight, high-quality rolls.
Unwinding Guide Diagram
Working Principle:
The guide sensor detects the relative positions of the edges, lines or color blocks of the web material. It compares the detected values with the set values to determine the deviation. After being calculated by the controller program, the deviation is converted into proportional signals and sent to the electric actuator for guiding.
Application classification:
unwinding/rewinding
System composition:
controller, sensor, actuator, switching power supply, other Accessories, etc.
Sensor Detection method:
edge detection, line detection, color block detection, two sensors centering guide
Sensor options：
ultrasonic, infrared, CCD camera etc.
FAQ
Q1: What is the Working Conditions?
- The unwinding/rewinding equipment must be fitted with left-right adjustable slide rails and a braking system
- Stable web tension must be provided
Q2: Edge Sensor Mounting Positions?
- For unwinding: Installed on the material exit side, at the midpoint (1/2 stroke) between the last movable roller and the first fixed roller
- For rewinding: Mounted before the last fixed roller; the sensor must be linked with the rewinding frame
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