Ac servo technology has developed from the early 80s, application technology becomes more mature and the property improved every year. It is widely used in the CNC turning machine, packaging machine, printer, textile machine, and other automated equipment. SG series ac servo driver, a new generation product, using the latest 32-bit DSP unit As the center core work unit, which we research and develop independently. Adopt the complex programmable device EPLD and Mitsubishi into intelligent power modules. This ac servo driver has the advantages of high integration, small volume, fast response speed, perfect protection, high reliability, etc.