Inkjet printing system and deviation correction method for inkjet printing system

Abstract

The invention discloses an ink-jet printing system and a deviation rectifying method for the ink-jet printing system. The ink-jet printing system is specifically composed of a printing unit, a monitoring module and deviation rectifying software, wherein the printing unit comprises a printing module and a printing module beam, the total width of a nozzle on a printing jet head is larger than the width of an image to be printed, the monitoring module comprises a photographing device and a supporting beam, the supporting beam stretches over a printing medium and is located on one side, in the paper discharging direction, of the printing module beam, the supporting beam is provided with the photographing device, when finding that the position of the photographed image deviates, the deviation rectifying software selects the jet head for printing the deviation image and carries out real-time X-axis or Y-axis deviation adjustment on ink discharging data of the selected jet head, an FPGA in a jet head control plate directly transmits the adjusted ink discharging data to the jet head, and the image with printing deviation is adjusted to the correct printing position. The ink-jet printing system is applied to an assembly line, the deviation problem occurring in the image printing process can be found in real time, adjustment is carried out in time, printing will not be interrupted, and meanwhile the printing effect of fast jet drawing is ensured.

Description

technical field [0001] The present invention relates to an inkjet printing system and a deviation correction method for the inkjet printing system, in particular to an inkjet printing system for manually correcting printing deviations of inkjet graphics and text in real time during the printing process of a Onepass (one-pass inkjet type) printing system and Inkjet printing systems use a deflection method. Background technique [0002] At present, during the working process of the inkjet printing system in the industry, the nozzles of the printing system eject ink droplets to form inkjet graphics on the printing medium. During the inkjet process, the printing module remains still, and the printing medium under the nozzle passes through at high speed in one direction. The printing accuracy and printing width of the nozzles are very high when using one-time paper-feeding imaging inkjet printing. The printing accuracy of the nozzles must be the printing accuracy of the image, a...

AI Technical Summary

Problems solved by technology

[0003] During the high-speed continuous passing of the printing medium under the Onepass printer, especially in the application of industrial assembly line transportation of the printing medium, the printing medium is tensioned by the tension bar before starting the printing job so that it is in the correct position. The position of the printing medium is guaranteed to no longer move, but with the high-speed transmission and continuous work, the tension of the printing medium may change slightly compared with the initial printing setting, which will cause the position of the printing medium to shift. In this case, when the ink drop data of the nozzle head remains in the original state, the ink droplet ejected by the nozzle head maintains the original position, while the relative position of the lower droplet on the printing medium changes, which leads to the printing of the inkjet image. will also shift the original position

In some specific applications, such as printing continuous product packaging webs, such as cigarette wrapping paper, some graphics and texts have been pre-processed on the packaging paper and presets that require a one-time paper-feeding inkjet printer to eject graphics and texts Frame, for example, a one-time inkjet printer needs to quickly eject the two-dimensional code in the pre-set square frame. When the printing medium moves slightly, the two-dimensional code will be centered from the set square frame Gradually shifted to one side of the square frame, or even moved out of the square frame, which will result in poor printing quality and unqualified products

At this time, if the transmission of the printing medium is stopped and its position and tension bar are adjusted again, the working process of the production line will be interrupted, and the readjustment of the mechanical equipment will also take time and effort, which will directly affect the production efficiency

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