{"id":864,"date":"2025-12-18T09:00:00","date_gmt":"2025-12-18T01:00:00","guid":{"rendered":"https:\/\/smtbase.com\/aoi-machine-guide\/"},"modified":"2026-08-23T22:25:44","modified_gmt":"2026-08-23T14:25:44","slug":"huong-dan-su-dung-may-aoi","status":"publish","type":"page","link":"https:\/\/www.smtbase.com\/vi\/tai-nguyen\/huong-dan-su-dung-may-aoi\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn v\u1ec1 m\u00e1y AOI: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng ki\u1ec3m tra quang h\u1ecdc t\u1ef1 \u0111\u1ed9ng"},"content":{"rendered":"\n<style>\n:root{--navy:#07182e;--blue:#1468e5;--orange:#f47a32;--ink:#17263a;--line:#dfe7f1;--mist:#f4f7fb}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:Inter,\"Segoe UI\",Arial,sans-serif;line-height:1.72}a{color:var(--blue);text-decoration:none}.shell{width:min(1180px,calc(100% - 40px));margin:auto}.preview{padding:10px;color:#ffe8d8;background:#6e2e0d;text-align:center;font-size:12px;font-weight:700}.hero{padding:92px 0 43px;border-bottom:1px solid var(--line)}.hero .shell{width:min(1180px,calc(100% - 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40px))!important;height:auto!important;margin:34px auto 0!important;overflow:visible!important;border:0!important;border-radius:0!important;background:#eef2f6!important;box-shadow:none!important}\n.smt-article-page .smt-detail-cover img{display:block!important;width:100%!important;height:420px!important;aspect-ratio:auto!important;object-fit:cover!important;object-position:center!important;border:0!important;border-radius:0!important;box-shadow:none!important}\n.smt-article-page .smt-detail-cover figcaption{margin:7px 0 0!important;color:#7b8795!important;background:#fff!important;font-size:10px!important;line-height:1.5!important;text-align:right!important}\n.smt-article-page .smt-detail-cover figcaption a{color:#60758d!important}\n@media(max-width:760px){.smt-article-page .smt-detail-cover{width:calc(100% - 28px)!important;height:auto!important;margin-top:24px!important}.smt-article-page .smt-detail-cover img{height:auto!important;aspect-ratio:3\/2!important}}\n<\/style><div class=\"smt-page-full alignfull smt-article-page\"><header class=\"hero\"><div class=\"shell\"><nav class=\"crumbs\"><a href=\"\/\">Home<\/a><span>\/<\/span><a href=\"\/resources\/\">Resources<\/a><span>\/<\/span><strong>AOI Machine Guide<\/strong><\/nav><h1>AOI Machine Guide: How Automated Optical Inspection Works<\/h1><p class=\"lead\">An AOI machine uses cameras, controlled lighting and algorithms to evaluate visible PCB features. It can detect missing, shifted, rotated, lifted or incorrect components and visible solder anomalies. AOI does not prove electrical function and cannot fully inspect joints hidden beneath packages.<\/p><div class=\"meta\"><span>By SMTBase Editorial Team<\/span><span>Fact checked: 2026-08-23<\/span><span>3 min read<\/span><\/div><div class=\"warning\">Editorial status: technical reviewer name and credentials still need to be added before publication.<\/div><\/div><\/header><figure class=\"smt-detail-cover\"><img fetchpriority=\"high\" src=\"https:\/\/smtbase.com\/wp-content\/uploads\/2026\/08\/resource-cover-aoi-machine.webp\" alt=\"Yamaha YRi-V 3D automated optical inspection machine\" width=\"1200\" height=\"800\" loading=\"eager\" decoding=\"async\"><figcaption>Image source: <a href=\"https:\/\/global.yamaha-motor.com\/business\/smt\/inspectionsystem\/yri-v\/\" target=\"_blank\" rel=\"noopener noreferrer\">Yamaha Motor<\/a><\/figcaption><\/figure><aside id=\"reader\"><span class=\"label\">Text size<\/span><button data-a=\"down\">A\u2212<\/button><button class=\"reset\" data-a=\"reset\">Reset<\/button><button data-a=\"up\">A+<\/button><span class=\"value\">100%<\/span><\/aside><main class=\"shell grid\"><aside class=\"toc\"><strong>In this guide<\/strong><nav><a href=\"#2d-3d-and-defect-coverage\">2D, 3D and Defect Coverage<\/a><a href=\"#false-calls-and-escapes\">False Calls and Escapes<\/a><a href=\"#selection\">Selection<\/a><a href=\"#faq\">FAQ<\/a><a href=\"#related-resources\">Related Resources<\/a><a href=\"#primary-sources\">Primary Sources<\/a><\/nav><\/aside><article class=\"article\"><p># AOI Machine Guide: How Automated Optical Inspection Works<\/p>\n<p>An AOI machine uses cameras, controlled lighting and algorithms to evaluate visible PCB features. It can detect missing, shifted, rotated, lifted or incorrect components and visible solder anomalies. AOI does not prove electrical function and cannot fully inspect joints hidden beneath packages.<\/p>\n<h2 id=\"2d-3d-and-defect-coverage\">2D, 3D and Defect Coverage<\/h2>\n<p>2D AOI analyses color, contrast, edges, text and shape. 3D adds height or surface information for lifted parts, coplanarity and solder geometry. Many systems combine both. JUKI describes inspection using 3D and 2D imagery for component and solder defects; see <a href=\"https:\/\/www.juki.co.jp\/en\/products\/smt.html\" target=\"_blank\" rel=\"noopener noreferrer\">JUKI overview<\/a>.<\/p>\n<div class=\"table-scroll\"><table><thead><tr><th>Area<\/th><th>Examples<\/th><\/tr><\/thead><tbody>\n<tr><td>Presence<\/td><td>Missing or extra part<\/td><\/tr>\n<tr><td>Position<\/td><td>Shift, rotation, polarity<\/td><\/tr>\n<tr><td>Height<\/td><td>Tombstone, lifted lead or body<\/td><\/tr>\n<tr><td>Marking<\/td><td>Visible code verification<\/td><\/tr>\n<tr><td>Solder<\/td><td>Visible bridge or volume anomaly<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<h2 id=\"false-calls-and-escapes\">False Calls and Escapes<\/h2>\n<p>A false call rejects a good feature; an escape accepts a defect. Tight limits may overwhelm review while loose limits hide risk. Use defect standards, known-defect challenges and controlled disposition. Hidden BGA joints generally need X-ray or another suitable method.<\/p>\n<h2 id=\"selection\">Selection<\/h2>\n<p>Compare coverage, resolution, 2D\/3D method, board range, side views, cycle time, programming, review, traceability, data export and service. Test dense, reflective and tall-component areas plus real known defects.<\/p>\n<h2 id=\"faq\">FAQ<\/h2>\n<h3 id=\"can-aoi-replace-electrical-test\">Can AOI replace electrical test?<\/h3>\n<p>No. AOI evaluates visible physical evidence; electrical tests evaluate circuit behavior.<\/p>\n<h3 id=\"where-is-aoi-installed\">Where is AOI installed?<\/h3>\n<p>Common positions are after placement and after reflow, selected according to defect risk and correction cost.<\/p><section class=\"related\"><h2 id=\"related-resources\">Related Resources<\/h2><div class=\"related-grid\"><a href=\"\/spi-machine-guide\/\">SPI Machine Guide<\/a><a href=\"\/complete-smt-production-line-guide\/\">Complete SMT Production Line Guide<\/a><a href=\"\/sensors-vision\/\">SMT Sensors and Vision Parts<\/a><a href=\"\/contact\/\">Contact SMTBase<\/a><\/div><\/section><section class=\"sources\"><h2 id=\"primary-sources\">Primary Sources<\/h2><ul><li><a href=\"https:\/\/kohyoung.com\/en\/automated-optical-inspection-system-aoi\/\" target=\"_blank\" rel=\"noopener noreferrer\">Koh Young automated optical inspection systems<\/a><\/li><li><a href=\"https:\/\/www.juki.co.jp\/en\/products\/smt.html\" target=\"_blank\" rel=\"noopener noreferrer\">JUKI SMT inspection process overview<\/a><\/li><li><a href=\"https:\/\/global.yamaha-motor.com\/business\/smt\/inspectionsystem\/\" target=\"_blank\" rel=\"noopener noreferrer\">Yamaha inspection system lineup<\/a><\/li><\/ul><\/section><section class=\"cta\"><h2>Need help identifying an SMT replacement part?<\/h2><p>Send the machine model, part number and clear label photos. SMTBase will review the available sourcing options.<\/p><a href=\"\/contact\/\">Contact SMTBase \u2192<\/a><\/section><div class=\"note\">Preview note: technical review is required before publication.<\/div><\/article><\/main><script>(function(){var a=document.querySelector('.article'),r=document.getElementById('reader'),v=r.querySelector('.value'),s=100;function x(){a.style.setProperty('--fs',15*s\/100+'px');a.style.setProperty('--h2',32*s\/100+'px');a.style.setProperty('--h3',22*s\/100+'px');v.textContent=s+'%'}r.onclick=function(e){var b=e.target.closest('button');if(!b)return;if(b.dataset.a==='up')s=Math.min(130,s+5);if(b.dataset.a==='down')s=Math.max(85,s-5);if(b.dataset.a==='reset')s=100;x()};x()})();<\/script><\/div>\n","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch h\u1ec7 th\u1ed1ng AOI 2D v\u00e0 3D ki\u1ec3m tra c\u00e1c c\u1ee5m linh ki\u1ec7n SMT, nh\u1eefng khuy\u1ebft t\u1eadt m\u00e0 h\u1ec7 th\u1ed1ng AOI c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n, nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a n\u00f3 v\u00e0 c\u00e1ch so s\u00e1nh c\u00e1c lo\u1ea1i m\u00e1y.<\/p>","protected":false},"author":1,"featured_media":0,"parent":836,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"class_list":["post-864","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>AOI Machine Guide: How Optical Inspection Works<\/title>\n<meta name=\"description\" content=\"Learn how 2D and 3D AOI inspect SMT assemblies, which defects AOI detects, its limits and how to compare machines.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.smtbase.com\/vi\/tai-nguyen\/huong-dan-su-dung-may-aoi\/\" \/>\n<meta property=\"og:locale\" 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