For automatic alignment of corrugated lines and paper strip conveying machines, the goal is to maintain precise lateral positioning of the paper web (e.g., linerboard, medium, or single-face web) during high-speed production. This ensures consistent corrugation, prevents edge damage, and reduces waste. Here's a breakdown of the key principles and typical solutions: Core Components of an Automatic Alignment System Sensors Edge sensors (photoelectric, ultrasonic, or pneumatic) detect the paper edge position. CCD cameras or laser scanners provide higher accuracy (e.g., ±0.1 mm) for demanding applications. For corrugated lines, sensors often monitor the single-face web before the bridge or the double-backer entrance. Controller A PLC or dedicated web guide controller processes the sensor signal and sends correction commands. PID (Proportional-Integral-Derivative) algorithms are commonly used to optimize response speed and stability. Actuator / Guiding Mechanism Steering rollers (p…
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