usesage: 1.it adopts computer to control, step motor to adjust the speed stepless, and it has many advantages of top position stopping, steady function, accurate positioning etc. 2.shxj-900 is suitable for scaling and cutting the hdpe, ldpe and pp plastic film. it has automatic photoelectric feeding system, automatic temperature control system, electric static eliminating system, automatic counting system, alarm system and automatic transmission system etc. it can improve the producing efficiency obviously.