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In this study, the application of the R2R (roll to roll) tension control of the speed, capability and stability is proposed. The system is based on proportional - integral compensation control the servo motor speed to obtainfixed speed and tension. In the control system architecture, consists of unwinding system, fixed speed system, and winding system. Systems begin with plastic bag lamination off axis tension, each independent tension detection device can individually feedback. In addition to fixed speed systems, winding and rewinding system because there are roll diameter changes, so roll diameter calculation can be applied to obtain the line speed. Tension detection and feedback units use a proportional - integral servo motor speed adjustment of the system to get a high stability of tension and speed control. Traditional control method is via the AD / DA module feedback tension value changes with severally servo motor torque control mode to reach a certain tension. This study proposed proportional - integral pre-integrated system to compensate servo motor speed and precise diameter calculation to obtain higher and more precise control accuracy and stability.
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