Automatic positioning belt laser height measurement PCB dispensing method

Abstract

The invention discloses an automatic positioning belt laser height measurement PCB dispensing method which comprises the following steps: A) fixing a camera coordinate system in the operation process of a printing machine, and marking PCB dispensing position information by using the camera coordinate system as a benchmark; B) setting M1 and M2 as the marked points of the PCB dispensing area position recorded in dispensing study and M1' and M2' as the marked points of another PCB after being fed anew; C) enabling the dispensing area to be subjected to rotary translation due to PCB stopping position deviation, and defining the included angle of line segment M1M2 and line segment M1'M2' as omega and the center translation amount as delta X and delta Y respectively; D) calculating the value of the center translation amount delta X and delta Y and the value of the included angle omega; E) obtaining the deviation value of the dispensing area positions recorded in study and in dispensing by calculating omega, delta X and delta Y; F) rectifying the image in dispensing; G) conducting laser height measurement and compensation. The dispensing method is simple in steps, convenient to operate and easy to implement.

Description

technical field [0001] The invention relates to a PCB dispensing method, in particular to a PCB dispensing method with automatic positioning and laser height measurement. Background technique [0002] During the dispensing process, since there are translation and rotation errors in each PCB feeding position, the first step in PCB dispensing is to calibrate the image and locate the dispensing position. The unification of the image coordinate system is carried out when there is an error in the board through image calibration, and then the dispensing operation is performed on the PCB by using the positioning information of the dispensing position. The PCB is affected by the vibration of the machine during the shutdown process, and the location of each shutdown is random. In addition, due to manufacturing errors, the positions of the overall pads of the same batch of PCB boards in the substrate are also different, resulting in In each dispensing, the dispensing position of the ...

AI Technical Summary

Problems solved by technology

The PCB is affected by the vibration of the machine during the shutdown process, and the location of each shutdown is random. In addition, due to manufacturing errors, the positions of the overall pads of the same batch of PCB boards in the substrate are also different, resulting in In each dispensing, the dispensing position of the PCB will change, which requires the PCB board to be repositioned before each dispensing

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