Abstract
Due to the development of the larger size of FPD, the conveyor system, especially the lifting system, become a significant topic. This paper aims to develop novel lifting system with the AC servo driving and the pneumatic-balanced system for the new generation of LCD glass substrates. Owing to the large variation range of the loading in the new generation lifting system, the pneumatic-balanced system is developed for counterbalanced the weight of the loading for reducing the loading power of the AC servo motor. A PC-Based control system is developed for achieving better response and position accuracy. Adaptive sliding mode control with function approaching technique is used in this paper as the control strategy. In order to improve the jerk problem during the motion process, path control is used. The proposed new lifting system with pneumatic-balanced technique is implemented and verified through simulation and experiment.
