A fully automatic step-by-step color pre-registration method

Abstract

The invention discloses a full-automatic step-by-step pre-color registering method. The full-automatic step-by-step pre-color registering method specifically comprises the following steps of additionally arranging a photoelectric eye on a first color unit; after a to-be-printed material is flatly fed, the ink amount is uniform and the tension is stable, starting a printer; enabling plate rollers of the first color unit to automatically laminate, and printing reference color; enabling the photoelectric eye to detect the marker shape of the first color unit, and treating the condition that the marker shape is not detected, until the marker shape of the first color unit is detected; from a second color unit, identifying the marker shape of a current color unit step by step, and treating the condition when the marker shape is not detected; after the marker shape is identified, sequentially reading the longitudinal errors of marker shapes of the existing color unit and the previous color unit, controlling the longitudinal error range to be -5 to 5mm, and correcting the longitudinal error within the range of -5 to 5mm, so as to control the longitudinal error range of marker shapes of the existing color unit and the previous color unit to be -2 to 2mm, thereby completing the pre-color registering process of the existing color unit. The full-automatic step-by-step pre-color registering method solves the problem of low pre-color registering accuracy due to artificial operation of pre-color registering in the printing process.

Description

technical field [0001] The invention belongs to the technical field of printing color registration, and relates to a fully automatic step-by-step pre-color registration method. Background technique [0002] For traditional electronic axis printing machines, the current electronic axis control system can realize automatic overprinting during the printing process. Pre-colouring is a very important process in the early stage of printing. After pre-colouring, the later overprinting can be more accurate. However, the current The pre-registration needs to be done manually by the operator, and there is a large uncertainty in the manual operation. Therefore, the precision of the pre-registration is low, and the scrap rate generated during the production process is high, which is time-consuming and laborious. Contents of the invention [0003] The purpose of the present invention is to provide a fully automatic step-by-step pre-registration method, which solves the problems of low ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fully automatic step-by-step pre-registration method, which solves the problems of low pre-registration accuracy and high rejection rate in the printing process when the pre-registration is manually operated.