Method and apparatus for controlling printing sleeving alignment

Abstract

The invention provides a method for controlling printing sleeving alignment. The method comprises the following steps: 1), presetting a reference position, the distance from each nozzle module to the reference position and the relative distance of each nozzle module to an initial nozzle module, starting printing of this time, and outputting coding pulse signals in real time; 2), according to the coding pulse signals output in real time, determining whether the initial nozzle module passes through the distance from the initial nozzle module to the reference position, and if so, enabling the initial nozzle module to start printing; and 3), according to the coding pulse signals output in real time, respectively determining whether other n-1 nozzle modules pass through the distances from the corresponding nozzle modules to the reference position, if it is determined that one of the nozzle modules passes through the distance from itself to the reference position, continuing determining whether the nozzle module passes through the distance from itself to the initial nozzle module, and if so, enabling the nozzle module to start printing until the other n-1 nozzle modules respectively start printing. The invention correspondingly provides an apparatus for controlling printing sleeving alignment. According to the invention, the problem of unaligned sleeving printing of different color-surface images can be reduced.

Description

technical field [0001] The invention relates to the technical field of digital printing, in particular to a method and device for controlling printing alignment. Background technique [0002] Digital printing is a printing technology that has developed rapidly in recent years, and it uses the method of directly inputting, processing and printing data. The principle of digital printing equipment is: process the original data into dot matrix data through the host computer, process the dot matrix data into imaging data suitable for imaging through the control system, and then control the imaging components to directly image the imaging data. Among them, the workflow of digital printing equipment for on-demand inkjet printing is that, under the control of the control system, when the substrate (such as paper) reaches a predetermined position, the piezoelectric crystal in the imaging component is controlled to generate pulses to send the nozzle module The ink in the process is e...

AI Technical Summary

Problems solved by technology

After printing is started, each print head module will use the corresponding start code pulse signal as the start print clock to start spraying. However, due to the error of the encoder itself and the error of the paper movement, the above is only The scheme of controlling each nozzle module to start printing with the corresponding start code pulse signal of the module will cause errors in the overprinting of the images of the four color planes; moreover, due to the different physical positions of each nozzle module, each nozzle module The clock used by the module when it starts printing is not the encoding pulse signal at the same time, and the encoding pulse signals at different times are not uniform, which will further cause errors in the overprinting of the images of the four color surfaces, thus affecting the print effect

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