Design of AC Servo Control System in Precision Turntable

Precision turntable is commonly used in industrial non-destructive testing,such as industry CT.All-digital control way is used in this servo control system.By using the AC servo control,the system achieves the rotation at different speed and in clockwise and anticlockwise direction accuracy of 0.05o.According to the parameters set by the host computer,precision turntable can rotate arbitrarily from 0.1o to 360o.Using programmable logic controller as main controller and combining with YASKAWA servo controller,the system constitutes a three-closed-loop control system composed of current loop,velocity loop and position loop.The servo system which has good anti-interference ability,fast response,higher positioning accuracy,can provide a reference for achieving high-precision servo control based on PLC in industrial application.