(1) Adopt good quality components with low failure rate and long service life. (2) Multi linkage arm has strong loading capacity;working fast and stable without impact. (3) Driven by motor,controlled by frequency converter and PLC;arm has stand-by function,which could improve working efficiency. (4) Adopt Mitsubishi PLC and Delta touch screen with stable performance;could supervise every movement,which is convenient for operation and maintenance. (5) The system is equipped with self diagnosing and failure alarm function for easy removal problems.