The flexographic printing machine is mainly composed of 4 parts, namely the unwinding feeding part, the printing part, the drying part and the rewinding and rewinding part. In modern flexographic printing presses, there are generally measurement and control devices such as tension control, edge position control, register control, printed product observation, and mechanical condition monitoring and fault diagnosis systems. In addition, in order to expand the scope of application, some flexographic printing presses are also equipped with glazing, laminating, bronzing, slitting, die cutting, punching, silk screen, and gravure units, etc., to become a flexo printing unit. production line.