Development and control of broken-strap monitoring system for newspaper flexi-roll machines. (1st January 2012)

• Record Type: Journal Article
• Authors: Lei, Yun; Li, Yaoyu
• Is Part Of: International journal of automation and control. Volume 6:Number 1(2012)
• Page Start: 81
• Page End: 103
• Publication Date: 2012-01-01
• Subjects: newspaper rolling -- strap breaking -- photo-eye -- pattern classification -- deadzone compensation; Automation -- Periodicals; Control theory -- Periodicals; Automatic control -- Periodicals; Robots -- Periodicals; Bionics -- Periodicals; Intelligent control systems -- Periodicals
• Languages: English
• ISSNs: 1740-7516

Abstract

Strap breaking is a significant maintenance issue that occurs when the newspapers are bound using single or double parallel straps on flexi-roll machine during the rolling process, resulting significant downtime and product loss. To prevent the occurrence of strap breaking, an automatic fault detection system is developed to identify the lateral deflection of binding straps in the early stage using the reflectance sensor. As the reflectance sensor has to travel along the increasing diameter of the paper roll during the rolling process, fixed mounting of sensor would not work. A mobile sensor-carrying mechanism is thus developed in this study, via a DC motor-driven linear actuator. The system is controlled with a programmable logic controller, with a neural network (NN)-based compensator to deal with the actuator deadzone. The photo-eye measurements are then used to detect the broken-strap based on a NN classifier.