Calibration and alignment method of solder paste printing machine

Abstract

The invention relates to a solder paste printing machine calibrating and aligning method. The method comprises the following steps that 1) a solder paste printing machine is calibrated by establishinga calibration coordinate system and obtaining a motion amount, corresponding to each unit of change of a coordinate in the calibration coordinate system, of a platform; 2) a coarse aligning positionis measured by calculating the distance between a central point of a track and a central position of a steel mesh blocking cylinder; 3) a mark point is demonstrated by determining coordinates of a steel mesh demonstration position and a PCB demonstration position; and 4) aligning is carried out before printing by that the gravity coordinates of mark points on a steel mesh and a PCB are calculatedafter loading of the PCB, calculating a difference between the two coordinates, obtaining the total motion amount, needed by the platform, according to the motion amount, corresponding to each unit ofchange of the coordinate in the calibration coordinate system, of the platform, and driving the platform to move on the basis of the total motion amount. Thus, the solder paste printing machine can be calibrated and aligned automatically based on machine vision technologies, the precision and efficiency are higher, and artificial intervention is not needed.

Description

technical field [0001] The invention belongs to the technical field of machine vision automation, and in particular relates to a calibration and alignment method for a solder paste printing machine used in the surface mounting industry. Background technique [0002] The traditional solder paste printing machine is based on the measurement of the measuring tool, and the measured data is input into the software, so as to continuously adjust the PCB to the precise position to achieve the purpose of alignment. The operation is complicated and the accuracy depends entirely on the accuracy of mechanical parts and assembly accuracy. With the long-term operation of the equipment, the loss of mechanical parts will gradually lose the printing accuracy. At this time, experienced operators need to judge by experience and readjust the equipment. Therefore, the low adjustment precision of the solder paste printing machine results in low printing precision, and requires a lot of manual ope...

AI Technical Summary

Problems solved by technology

Therefore, the adjustment accuracy of the solder paste printing machine is low, resulting in low printing accuracy, and requires a lot of manual operations, and the efficiency is low