{"id":10188,"date":"2026-10-21T10:02:34","date_gmt":"2026-10-21T10:02:34","guid":{"rendered":"https:\/\/www.sipconinstrument.com\/us\/blog\/?p=10188"},"modified":"2026-10-21T10:02:34","modified_gmt":"2026-10-21T10:02:34","slug":"optical-cmm-vs-tactile-cmm-usa","status":"publish","type":"post","link":"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/","title":{"rendered":"Optical CMM vs Tactile CMM: Which Fits Your Production Floor in the USA?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">A part looks fine. Its surface is smooth, the edges are clean, and everything seems to be in place. But what if a hole is slightly off-centre? Or a tiny component is thicker than the drawing allows?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">These small differences matter in manufacturing. And that&#8217;s why parts need to be measured properly.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If you&#8217;re looking for an <\/span><a href=\"https:\/\/www.sipconinstrument.com\/us\/cmm\/\"><b>optical cmm USA<\/b><\/a><span style=\"font-weight: 400;\"> solution, you&#8217;ve probably come across tactile CMMs too. Both are used for dimensional inspection, but they don&#8217;t measure parts in the same way.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Which one makes more sense for your production floor? Let&#8217;s find out.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#What_an_Optical_CMM_Is_and_How_It_Measures_%E2%80%93_A_Guide_for_USA_Manufacturers\" >What an Optical CMM Is and How It Measures &#8211; A Guide for USA Manufacturers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#Optical_vs_Tactile_CMM_in_the_USA_Speed_Accuracy_and_Part_Types\" >Optical vs Tactile CMM in the USA: Speed, Accuracy and Part Types<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#Reading_Optical_CMM_Accuracy_Specs_in_the_USA_ISO_10360-7_ASME_B894103602\" >Reading Optical CMM Accuracy Specs in the USA: ISO 10360-7 &amp; ASME B89.4.10360.2<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#GD_T_to_ASME_Y145_on_an_Optical_CMM_for_USA_Quality_Teams\" >GD&amp;T to ASME Y14.5 on an Optical CMM for USA Quality Teams<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#Optical_CMM_Use_Cases_in_the_USA_Medical_Aerospace_and_Electronics\" >Optical CMM Use Cases in the USA: Medical, Aerospace and Electronics<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#Medical_Manufacturing\" >Medical Manufacturing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#Aerospace_Manufacturing\" >Aerospace Manufacturing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#Electronics_Manufacturing\" >Electronics Manufacturing<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.sipconinstrument.com\/us\/blog\/optical-cmm-vs-tactile-cmm-usa\/#Optical_CMM_ROI_and_Buying_Checklist_for_USA_Buyers\" >Optical CMM ROI and Buying Checklist for USA Buyers<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_an_Optical_CMM_Is_and_How_It_Measures_%E2%80%93_A_Guide_for_USA_Manufacturers\"><\/span><b>What an Optical CMM Is and How It Measures &#8211; A Guide for USA Manufacturers<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Think of measuring a tiny plastic connector. It&#8217;s small, has several edges and may bend if you press it too hard.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">An Optical CMM can measure its visible features without touching it.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The machine uses cameras, lenses and controlled lighting to capture images. Its software then finds edges and calculates dimensions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It can check things like:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hole sizes and positions<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Edges and gaps<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Width and length<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Small slots and profiles<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Certain surface features<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">An <\/span><b>Optical CMM<\/b><span style=\"font-weight: 400;\"> is particularly useful when the part is too delicate for physical probing.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">An <\/span><b>optical coordinate measuring machine USA<\/b><span style=\"font-weight: 400;\"> supplier offers may have automatic inspection features too. But these depend on the model and software.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">What about a Vision Measuring Machine or Profile Projector?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">They also use optical methods. A Vision Measuring Machine measures features through camera-based software, while a Profile Projector displays an enlarged outline for inspection. Neither should automatically be treated as a full 3D CMM.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Optical_vs_Tactile_CMM_in_the_USA_Speed_Accuracy_and_Part_Types\"><\/span><b>Optical vs Tactile CMM in the USA: Speed, Accuracy and Part Types<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Here&#8217;s the main difference.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">An optical machine looks at the part. A tactile machine touches it.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A tactile <\/span><a href=\"https:\/\/www.sipconinstrument.com\/us\/cmm\/\"><b>Coordinate Measuring Machine<\/b><\/a><span style=\"font-weight: 400;\"> uses a probe to collect measurement points. It can reach certain features that a camera cannot see clearly.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">An optical system, on the other hand, can measure several visible features from one image.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Feature<\/b><\/td>\n<td><b>Optical CMM<\/b><\/td>\n<td><b>Tactile CMM<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Measuring method<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Camera and light<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Physical probe<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Part contact<\/span><\/td>\n<td><span style=\"font-weight: 400;\">No<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Yes<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Speed<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Often faster for visible features<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Depends on probing time<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Suitable parts<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Small and delicate<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Rigid and complex<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Main limitation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Hidden or poorly visible areas<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Contact with soft surfaces<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Accuracy<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Model-dependent<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Model-dependent<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400;\">Suppose your factory produces hundreds of small connectors daily. A <\/span><b>non-contact CMM<\/b><span style=\"font-weight: 400;\"> could save inspection time.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">But what if you&#8217;re checking a metal housing with deep holes? A tactile system may do a better job.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Accuracy isn&#8217;t simply about choosing optical or tactile. The machine, part shape, environment and inspection method all matter.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Reading_Optical_CMM_Accuracy_Specs_in_the_USA_ISO_10360-7_ASME_B894103602\"><\/span><b>Reading Optical CMM Accuracy Specs in the USA: ISO 10360-7 &amp; ASME B89.4.10360.2<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Machine brochures often mention accuracy in micrometres. But what does that number actually tell you?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Not enough, unless you know how it was tested.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For USA manufacturers, two standards are worth understanding.<\/span><\/p>\n<p><b>ISO 10360-7<\/b><span style=\"font-weight: 400;\"> covers acceptance and reverification testing for CMMs with imaging probes. It helps assess optical measurement performance under defined conditions.<\/span><\/p>\n<p><b>ASME B89.4.10360.2<\/b><span style=\"font-weight: 400;\"> covers performance testing of CMMs, primarily those using contact probing systems. It shouldn&#8217;t be treated as a direct optical CMM certification.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Before buying, check:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Measurement error: The extent to which a reported measurement can vary under conditions explained.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Repeatability: Do repeated measurements yield consistent values?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Measuring range: Do your parts fit into the working area of the machine.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Operating conditions: Does temperature, vibration or lighting have any impact on the results.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Enquire also about calibration.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Measurement traceability can be further assured by a laboratory accredited to ISO\/IEC 17025 of the relevant calibration work.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">One useful question to ask a supplier is, &#8220;Can you measure our actual part and show us the results?&#8221;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">That tells you more than a brochure alone.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"GD_T_to_ASME_Y145_on_an_Optical_CMM_for_USA_Quality_Teams\"><\/span><b>GD&amp;T to ASME Y14.5 on an Optical CMM for USA Quality Teams<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A component can have the correct length and width but still fail inspection.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Perhaps two holes aren&#8217;t positioned correctly. Or an edge isn&#8217;t straight enough.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This is where GD&amp;T comes in.<\/span><\/p>\n<p><b>ASME Y14.5<\/b><span style=\"font-weight: 400;\"> explains how geometric tolerances are shown and interpreted on engineering drawings.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Depending on its capabilities, an optical machine may check:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hole position<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Straightness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Circularity<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Parallelism<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Profile measurements<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">But there&#8217;s a catch.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Not every GD&amp;T measurement can be completed with a camera. Some features need 3D probing, especially when the required surfaces aren&#8217;t visible.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">So, before choosing an optical measuring machine, check your drawings. Make sure the system can measure the features and datums that matter.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Optical_CMM_Use_Cases_in_the_USA_Medical_Aerospace_and_Electronics\"><\/span><b>Optical CMM Use Cases in the USA: Medical, Aerospace and Electronics<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Different factories face different measurement problems. Here&#8217;s where optical inspection can be useful.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Medical_Manufacturing\"><\/span><b>Medical Manufacturing<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Medical components can be extremely small. Some also have surfaces that shouldn&#8217;t be touched during inspection.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">An Optical CMM can check accessible dimensions without applying probe pressure.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Aerospace_Manufacturing\"><\/span><b>Aerospace Manufacturing<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Aerospace parts often have demanding dimensional requirements.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Optical systems can inspect visible edges, holes and profiles. However, complex 3D features may still need tactile measurement.<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Electronics_Manufacturing\"><\/span><b>Electronics Manufacturing<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Think of miniature connectors, plastic housings and closely spaced features.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">These parts can be difficult to inspect manually.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A <\/span><a href=\"https:\/\/www.sipconinstrument.com\/us\/vision-measuring-system\/\"><b>Vision Measuring Machine<\/b><\/a><span style=\"font-weight: 400;\">, or <\/span><b>vision CMM<\/b><span style=\"font-weight: 400;\">, can make repeated checks easier. For basic outline inspection, a Profile Projector may also work.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The important thing is choosing the machine for the actual part, not just the industry.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Optical_CMM_ROI_and_Buying_Checklist_for_USA_Buyers\"><\/span><b>Optical CMM ROI and Buying Checklist for USA Buyers<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">An expensive machine isn&#8217;t always the right machine.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If your inspection work involves mostly small, flat components, you may not need a complex tactile CMM. But buying an optical system for parts with hidden features could create problems later.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Before investing in an <\/span><b>optical cmm USA<\/b><span style=\"font-weight: 400;\"> solution, consider these questions:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">What parts will you measure every day?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Are they soft, delicate or rigid?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">What tolerances must you meet?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">How many parts need checking per shift?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Can the software handle your GD&amp;T requirements?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">What training, calibration and support will you need?<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Also, compare inspection time, operator effort and the cost of rejected parts. These can affect the return on investment just as much as the machine&#8217;s purchase price.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For USA manufacturers, there&#8217;s no single winner between optical and tactile CMMs. It comes down to what you&#8217;re making and what needs measuring.<\/span><\/p>\n<p><a href=\"https:\/\/www.sipconinstrument.com\/contact\/\"><b>Send us a part for a free measurement trial.<\/b><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A part looks fine. Its surface is smooth, the edges are clean, and everything seems to be in place. But what if a hole is slightly off-centre? Or a tiny<\/p>\n","protected":false},"author":1,"featured_media":10189,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[187],"class_list":["post-10188","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cmm","tag-optical-cmm-vs-tactile-cmm"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Optical CMM vs Tactile CMM: Best Choice for USA<\/title>\n<meta name=\"description\" content=\"Compare optical CMM vs tactile CMM for USA manufacturers. 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