Method and system for controlling color registration in process of steady-speed printing of mechanical shaft gravure printing machine

Abstract

The invention belongs to the technical field of printing control, and discloses a method and system for controlling color registration in the process of steady-speed printing of a mechanical shaft gravure printing machine. The method includes the steps that printing units perform corresponding color group printing; an error detection system of the printing unit i determines whether color registration errors exist or not; if color registration errors exist, the color registration error value is calculated, under the determined color registration accuracy, according to a mode, based on a controlcalculation formula designed by a Lyapunov stability analysis method, the obtained color registration error value and the control amount of a pre-order compensation roller, the change amount of the longitudinal linear velocity of the compensation roller between the printing unit (i-1) and the printing unit i is obtained through calculation, and corresponding adjustment is carried out until the registration errors between a color group of the printing unit i and the color group of the printing unit 1 are eliminated. According to the mathematical model of a mechanical shaft, the Lyapunov analysis method is used for designing the control algorithm, the printing errors in the steady-speed printing process are eliminated, and the response speed and color registration accuracy of the system areimproved.

Description

technical field [0001] The invention belongs to the technical field of printing control, and in particular relates to a color registration control method and system in the process of steady-speed printing of a mechanical axis gravure printing machine. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: during the printing process of the mechanical axis gravure printing machine, the complex patterns to be printed are decomposed into several simple patterns and engraved on the printing plate rollers respectively. The feeding part passes through each printing unit in sequence, and each printing unit prints a corresponding simple pattern on the printing material, and finally obtains a complex printed pattern. In the printing process, there is a problem of accurate positioning of the corresponding printing pattern between each unit, that is, the problem of color registration error. The accuracy of color registration is v...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the problems existing in the existing technology are: the response speed in the stable speed printing process in the prior art is slow and the color registration accuracy is not high, and the existing model-based control scheme is not suitable for the different lengths of the mechanical axis. Give coping control strategies

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