Corrugated board printing machine automatic paper feeding system consists of a printing combination structure part and a paper feeding combination structure part. A rotary encoder is mounted on the printing plate roller of the printing assembly structure, and the rotary encoder drives the printing plate roller to rotate synchronously by the servo motor through the synchronous belt. The printing plate roller and the drawing roller and the rotary encoder are synchronously driven by the connecting gears. A servo motor is mounted on the wall of the paper feeding section, and a pull-down paper roll and a pull-up paper roll are driven by synchronous belts and gears. The other synchronous belt is connected with the drive friction wheel set, and another set is connected at the bottom of the friction wheel set. Servomotors are connected to a ball screw through a coupling and the axial position of the ball screw is defined by a fixed bearing.
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