Abstract: The cam is the core component of the winding mechanism of the spimming-frame. The design of cam is one of the most important and kifficult technolohies of textile machineries. The traditional mechanical cam has such drawbacds as unstable motion, easy wear, and difficulty to be replaced, etc. Therefore, an electronic cam of the spinning-frame is designed to simulate the movement of the traditional mechanical cam. The article briefly descusses the driving system of the electronic cam firstly, which is composed of Siemens PLC, touch panel, servo drivers, servo motor, reducer and ring plate lifting mechanism. Then, the mathematical model of the electronic cam is given, and the corresponding digital system of electronic cam is established. This study has laid a foundation for designing electronic winding mechanism of the spinning frame.

Key words: spinning-frame, electronic cam, mathematical model, PLC, servo system