Based On Machine Vision Automatic Alignment Parallel Light Exposure Machine Key Technology Research

Exposure machine is one of the key technology of manufacturing PCB equipment,line exposure machine main action (PCB manufacturers Engineering Departmentissued) printed circuit diagram of pattern transfer, printed circuit diagram is coveredwith an ultraviolet photosensitive ink transferred to the bare copper. The graphictransfer quality, directly related to the quality and quality of PCB. The high-end lineexposure machine at present the main push the parallel light exposure machine, lineresolution2/2mil, can be used for high precision, high density in high-end PCBproduction.Early PCB exposure machine is a good person to printed with the printed circuitpattern film and PCB, alignment efficiency and quality consistency in the increasinglyfine lines, line spacing is more and more high density board manufacture, it is difficultto guarantee the counterpoint to the efficiency and quality of. In this context, themachine vision technology is applied to the exposure machine equipment in need, CCDrecognition and automatic alignment exposure machine development has great customerdemand.CCD recognition and automatic alignment exposure machine development relatesto the technical cover the light, machine, electric, machine vision and many other fieldsof expertise, need each respect of integrated technology. How to achieve high efficiencyand high quality alignment, need the machine vision technology, and the motion controltechnology, processing and transmission technology platform.This paper is to address the problem, the process of software programming, visualprogramming, motion control programming, programming interface as the mainresearch object, in depth analysis of production of high precision PCB board processbased on mechanism, by writing and debugging of software and the software for CCDrecognition and automatic aligning the standard algorithm, to achieve overalldevelopment software programming. Main contents:1detailed study of contraposition platform driving mechanism, electric grinding,obtains the best alignment mechanism; 2detailed studies of film contraposition target image recognition and processing,to obtain the best image processing algorithm;3studied counterpoint and aligning mechanism for aligning platform to control theentire process, get the best alignment algorithm;In4studies exposure machine board process, write the best PLC process controlprocedure;In5studies the customer required equipment historical data, fault information,prepare to meet customer needs comprehensive human interface program.