Automatic contraposition method and system for screen printer

Abstract

The invention relates to an automatic alignment method and system for a screen printing machine. The method includes: adjusting the three lenses based on the first substrate aligned with the screen, so that the center of the lens crosshair coincides with any three points on the two outer edges of the first substrate, and recording these three points as Reference coordinate point; capture the corresponding outer edge on the subsequent substrate, obtain the corresponding three points intersecting with the lens cross line, and calculate the coordinates of the currently captured three points based on the three reference coordinate points; compare the currently captured three points The coordinates of each point and the recorded three reference coordinate points are used to determine the movement of the printing platform relative to the screen; based on the determined results, the X-axis motor, Y-axis motor and rotating motor are respectively driven to drive the printing platform for the X-axis direction, linear displacement in the Y-axis direction, and rotation around the Z-axis. The invention utilizes the CCD lens to capture the position of the substrate to adjust the printing platform for automatic alignment, which ensures alignment accuracy and improves production efficiency.

Description

technical field [0001] The present invention relates to a screen printing machine, and more particularly to an automatic alignment method and system for a screen printing machine. Background technique [0002] With the development of technology, screen printing has been widely used in various industries such as LCD, IC packaging, PCB printing, packaging and decoration because of its high printing precision and good quality. The precise alignment between the screen and the substrate is an important factor that determines the printing accuracy and quality of the screen printing machine. Existing semi-automatic screen printing machines all adopt platform fixed structure and manual feeding. Such as figure 1 As shown, the printing platform 12 is fixedly installed on the frame 11, and each time the material is fed, the worker takes the reference line of the plate as a reference, and then roughly judges the placement position visually to place the substrate. The defects of this ...

AI Technical Summary

Problems solved by technology

The defects of this kind of printing machine are obvious, the labor intensity of the operator is high, the production efficiency is low, and the alignment between the screen plate and the substrate is not accurate

In addition, there are some screen printing machines that use mechanical alignment, and set positioning pins and other mechanisms on the printing platform as alignment references, but this type of mechanical alignment screen printing machine cannot meet the production of high-precision, small-size substrates need

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