Servo edge pressing paper feeding device

An edge pressing paper feeding device comprising a paper feeding mechanism and a control system;

• wherein the paper feeding mechanism comprises:
• a vacuum absorption variable-speed paper feeding mechanism comprising at least a first variable-speed paper feeding wheel group, a second variable-speed paper feeding wheel group, and a third variable-speed paper feeding wheel group, a first vacuum air suction box, and a servo motor;
• a vacuum absorption constant-speed edge pressing paper feeding mechanism comprising at least three constant-speed paper feeding wheel groups, two edge pressing wheels and a second vacuum air suction box, and
• an edge pressing paper feeding wheel shaft;
• said two edge pressing wheels are installed on the edge pressing paper feeding wheel shaft, which shaft is arranged above a middle one of the constant-speed paper feeding wheel groups;
• a distance between the two edge pressing wheels is adjusted by moving the two edge pressing wheels on the edge pressing paper feeding wheel shaft, and
• gaps between the edge pressing wheels and the middle one of the constant-speed paper feeding wheel groups are smaller than the thickness of a paper board,
• wherein:
• said three variable-speed paper feeding wheel groups are all connected with the servo motor, and the servo motor is controlled by a servo controller of the control system, and
• a photoelectric encoder is arranged at an end of the edge pressing paper feeding wheel shaft and an output signal of the photoelectric encoder is connected to a PLC of the control system, and the output signal of the PLC of the control system is connected to the servo controller.