{"id":4372,"date":"2026-04-04T08:37:30","date_gmt":"2026-04-04T00:37:30","guid":{"rendered":"https:\/\/www.chuxin-smt.com\/?p=4372"},"modified":"2026-04-04T08:37:30","modified_gmt":"2026-04-04T00:37:30","slug":"audit-wave-soldering-machine-fat-sat-checklist","status":"publish","type":"post","link":"https:\/\/www.chuxin-smt.com\/de\/audit-wave-soldering-machine-fat-sat-checklist\/","title":{"rendered":"How to Audit a Wave Soldering Machine Before Purchase: FAT and SAT Checklist for Overseas Buyers"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2026\/03\/1774860924-64e480de-2ecb-4c7f-af4e-b1c38966b6c5.png\" alt=\"Minimalist engineering infographic of a wave soldering line with FAT and SAT audit labels\" class=\"wp-image-4370\" srcset=\"https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2026\/03\/1774860924-64e480de-2ecb-4c7f-af4e-b1c38966b6c5.png 1536w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2026\/03\/1774860924-64e480de-2ecb-4c7f-af4e-b1c38966b6c5-300x200.png 300w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2026\/03\/1774860924-64e480de-2ecb-4c7f-af4e-b1c38966b6c5-1024x683.png 1024w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2026\/03\/1774860924-64e480de-2ecb-4c7f-af4e-b1c38966b6c5-768x512.png 768w, https:\/\/www.chuxin-smt.com\/wp-content\/uploads\/2026\/03\/1774860924-64e480de-2ecb-4c7f-af4e-b1c38966b6c5-18x12.png 18w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" title=\"How to Audit a Wave Soldering Machine Before Purchase: FAT and SAT Checklist for Overseas Buyers - S&amp;M Co.Ltd\" \/><\/figure>\n\n\n\n<p>Buying a wave soldering machine overseas can be a smart CapEx move\u2014or an expensive lesson. Most \u201cbad purchases\u201d don\u2019t fail because the machine can\u2019t solder. They fail because the buyer never turns requirements into <strong>acceptance criteria<\/strong>, never witnesses the right tests, and ends up discovering gaps only after the crate arrives.<\/p>\n\n\n\n<p>A strong acceptance plan has two gates:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>FAT (Factory Acceptance Test):<\/strong> a witnessed, protocol-driven test at the supplier\u2019s site before shipment to confirm the build meets agreed requirements.<\/p><\/li><li><p><strong>SAT (Site Acceptance Test):<\/strong> a validation at your facility after installation to confirm the machine performs correctly under <em>your<\/em> utilities, boards, flux, and production constraints.<\/p><\/li>\n<\/ul>\n\n\n\n<p>Those definitions\u2014and why both matter\u2014are consistent across acceptance-testing guidance such as <a target=\"_blank\" rel=\"nofollow\" class=\"link\" href=\"https:\/\/www.realpars.com\/blog\/factory-acceptance-test\">RealPars\u2019 \u201cFactory Acceptance Test (FAT) Explained\u201d<\/a> und <a target=\"_blank\" rel=\"nofollow\" class=\"link\" href=\"https:\/\/blog.pqegroup.com\/commissioning-qualification\/fat-and-sat\">PQE Group\u2019s FAT vs SAT explainer<\/a>.<\/p>\n\n\n\n<p>This article gives you a practical, audit-ready FAT\/SAT checklist tailored to wave soldering systems, with an emphasis on <strong>what evidence to collect<\/strong> so engineering, quality, and procurement can sign off confidently.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Key takeaways<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Treat FAT and SAT as two different proofs:<\/strong> FAT proves the build; SAT proves the installed system in your environment.<\/p><\/li><li><p><strong>Write acceptance criteria into the PO<\/strong> (what to measure, method, pass\/fail, and what happens on deviations).<\/p><\/li><li><p><strong>Collect evidence, not opinions:<\/strong> calibration certificates, temperature logs, profiling records, sample-board results, and a closed punch list.<\/p><\/li><li><p><strong>Wave soldering acceptance must verify subsystems:<\/strong> fluxing, preheat, solder pot\/wave, conveyor, controls\/HMI, safety\u2014and nitrogen if applicable.<\/p><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">What FAT and SAT should prove (in plain terms)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">FAT: prove the machine is built right<\/h3>\n\n\n\n<p>FAT is where you confirm the supplier delivered what they promised\u2014mechanically, electrically, and functionally\u2014<em>before<\/em> you inherit the logistics risk. FAT is also where you can fix issues with the supplier\u2019s tools, spare parts, and engineers on hand.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">SAT: prove the process works on your boards<\/h3>\n\n\n\n<p>SAT is where you validate installation, utilities, training, and process stability using your boards (or a representative test vehicle), your flux, and your production constraints.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Key Takeaway<\/strong>: FAT reduces the risk of shipping the wrong machine. SAT reduces the risk of installing the right machine the wrong way.<\/p><\/blockquote>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Before you travel: bring the right inputs (and avoid \u201cwe\u2019ll tune it later\u201d)<\/h2>\n\n\n\n<p>Your FAT\/SAT plan is only as good as the inputs you provide. Before the FAT date, request these items in writing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Final machine configuration<\/strong>: options list, BOM, and drawings; confirmation of any revisions.<\/p><\/li><li><p><strong>Process envelope<\/strong>: target alloy (e.g., lead-free), flux type, max board weight, max thermal mass, expected throughput.<\/p><\/li><li><p><strong>Utility requirements<\/strong>: power, exhaust, compressed air, (optional) nitrogen flow\/purity, clearance and floor loading.<\/p><\/li><li><p><strong>Documentation package<\/strong>: manuals, wiring diagrams, PLC backups, spare parts list, maintenance schedule, calibration certificates.<\/p><\/li>\n<\/ul>\n\n\n\n<p>And bring instruments (or verify the supplier has them and they\u2019re traceably calibrated):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>contact thermometer \/ thermocouple meter for spot checks<\/p><\/li><li><p>tachometer or conveyor speed verification method<\/p><\/li><li><p>level\/straightedge and basic measurement tools<\/p><\/li><li><p>your acceptance test forms + punch-list template<\/p><\/li>\n<\/ul>\n\n\n\n<p>If you need a baseline for workmanship expectations, use standards as reference points. In most electronics plants, process requirements are anchored to documents like <strong>IPC J-STD-001<\/strong> (soldering requirements) and <strong>IPC-A-610<\/strong> (acceptability). Overviews such as <a target=\"_blank\" rel=\"nofollow\" class=\"link\" href=\"https:\/\/www.protoexpress.com\/blog\/ipc-j-std-001-standard-soldering-requirements\/\">this J-STD-001 soldering requirements explainer<\/a> help align stakeholders on what those standards are used for.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Wave soldering machine FAT checklist (factory acceptance test)<\/h2>\n\n\n\n<p>Think of FAT as five buckets: <strong>documentation, safety, mechanical, controls, and process subsystems<\/strong>. Your checklist should read like a series of pass\/fail items with evidence captured.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1) Documentation &amp; traceability (don\u2019t skip this)<\/h3>\n\n\n\n<p>Verify and collect:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Machine nameplate matches the PO (model, voltage, serial number).<\/p><\/li><li><p>Manuals, electrical schematics, pneumatic diagrams, and maintenance schedule provided.<\/p><\/li><li><p>PLC\/HMI program backup delivered (and version recorded).<\/p><\/li><li><p>Calibration certificates provided for temperature sensors, flow meters, oxygen sensor (if nitrogen), and conveyor measurement system.<\/p><\/li><li><p>Spare parts list and recommended wear parts (pumps, filters, belts, nozzles).<\/p><\/li>\n<\/ul>\n\n\n\n<p><strong>Evidence to capture:<\/strong> PDF pack + photo of nameplate + software\/firmware versions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2) Safety &amp; compliance checks<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>E-stops function and are accessible.<\/p><\/li><li><p>Door\/cover interlocks function as designed.<\/p><\/li><li><p>Heater over-temp protection and alarms verified.<\/p><\/li><li><p>Fume\/exhaust connections are labeled and safe.<\/p><\/li>\n<\/ul>\n\n\n\n<p><strong>Evidence:<\/strong> video clips of E-stop\/interlock\/alarm tests + alarm list export.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3) Mechanical build &amp; serviceability<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Conveyor rails and width adjustment are smooth and repeatable.<\/p><\/li><li><p>Board support, fingers, and fixturing points match your board sizes.<\/p><\/li><li><p>Access panels allow maintenance without full disassembly.<\/p><\/li><li><p>Flux reservoir\/pump access is service-friendly; filtration is present if specified.<\/p><\/li>\n<\/ul>\n\n\n\n<p><strong>Evidence:<\/strong> photos + recorded measurements + list of required tools.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4) Electrical \/ controls \/ data integrity<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Power-on self-test passes.<\/p><\/li><li><p>Alarms are meaningful (not generic) and include actionable causes.<\/p><\/li><li><p>PID temperature control shows stable behavior at steady state (no hunting\/overshoot that causes process drift).<\/p><\/li><li><p>Data logging works (temperature trends, conveyor settings, alarms) and can be exported.<\/p><\/li>\n<\/ul>\n\n\n\n<p><strong>Evidence:<\/strong> screenshots of trend data + exported log file + alarm history.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5) Process subsystem acceptance (wave-specific)<\/h3>\n\n\n\n<p>This is the heart of wave soldering machine acceptance. Use profiling guidance and repeatable measurement methods.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Fluxing system<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Flux application is uniform across board width at defined conveyor speed.<\/p><\/li><li><p>Spray\/foam system is adjustable and settings are repeatable.<\/p><\/li><li><p>Flux consumption rate can be recorded and controlled.<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Preheat system<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Each preheat zone reaches setpoint and holds temperature steadily.<\/p><\/li><li><p>Top-side temperature ramp is controllable (avoid thermal shock and flux burnout).<\/p><\/li>\n<\/ul>\n\n\n\n<p>Thermal profiling practices for mass soldering are commonly documented in materials such as <a target=\"_blank\" rel=\"nofollow\" class=\"link\" href=\"https:\/\/www.electronics.org\/TOC\/IPC-7530A.pdf\">IPC-7530A temperature profiling guideline (PDF)<\/a> and the solder-industry guide <a target=\"_blank\" rel=\"nofollow\" class=\"link\" href=\"https:\/\/www.aimsolder.com\/wp-content\/uploads\/wave_solder_profile_supplement.pdf\">AIM Solder\u2019s wave solder profile supplement (PDF)<\/a>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Solder pot \/ wave system<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Solder pot reaches setpoint and holds stability over time.<\/p><\/li><li><p>Wave height is adjustable and repeatable.<\/p><\/li><li><p>Pump function is stable; no unusual cavitation\/noise.<\/p><\/li><li><p>Dross removal method is workable and safe.<\/p><\/li>\n<\/ul>\n\n\n\n<p>For high-reliability workmanship expectations, standards like <a target=\"_blank\" rel=\"nofollow\" class=\"link\" href=\"https:\/\/nepp.nasa.gov\/docuploads\/06AA01BA-FC7E-4094-AE829CE371A7B05D\/NASA-STD-8739.3.pdf\">NASA-STD-8739.3 soldering standard (PDF)<\/a> are often referenced as a benchmark for disciplined soldering process control.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Conveyor system<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Conveyor speed matches setpoint across multiple speeds.<\/p><\/li><li><p>Speed repeatability is confirmed after stop\/start.<\/p><\/li><li><p>PCB transport is stable (no vibration-induced movement on fingers).<\/p><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Nitrogen system (if specified)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Oxygen level monitoring is installed (if required) and alarms are functional.<\/p><\/li><li><p>Nitrogen flow and purity requirements are documented and measured.<\/p><\/li>\n<\/ul>\n\n\n\n<p>(For example, Chuxin SMT notes selective-wave nitrogen requirements such as <strong>0.3\u20130.5 MPa<\/strong>, <strong>\u2265 5 m\u00b3\/h<\/strong>und <strong>\u2265 99.998% purity<\/strong> in its product knowledge base\u2014use your own process needs to set the contractual acceptance threshold.)<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">FAT \u201ctrial run\u201d you should insist on (even for an Awareness-stage buyer)<\/h2>\n\n\n\n<p>At minimum, require a controlled trial that generates objective evidence:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Run the machine to thermal steady state.<\/p><\/li><li><p>Execute a profiling run (representative board or test vehicle).<\/p><\/li><li><p>Run a small batch of sample boards through (even if components are limited).<\/p><\/li><li><p>Record defects and rework notes using your standard defect taxonomy.<\/p><\/li>\n<\/ul>\n\n\n\n<p>If you want practical setup guidance to cross-check against what you\u2019re seeing during FAT, Chuxin SMT\u2019s <a target=\"_self\" rel=\"follow\" class=\"link\" href=\"https:\/\/www.chuxin-smt.com\/de\/wave-soldering-machine-operation-guide-setup-safety-tips\/\">Bedienungsanleitung f\u00fcr Wellenl\u00f6tmaschine<\/a> is a useful reference for typical setup and safety items.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Shipping handover checklist (the part that prevents \u201cit worked at FAT\u201d)<\/h2>\n\n\n\n<p>Between FAT sign-off and shipment, your goal is to freeze the accepted configuration.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Final configuration photographed (critical settings screens + hardware options).<\/p><\/li><li><p>Punch list status: closed items verified; open items documented with deadlines.<\/p><\/li><li><p>Packing list matches shipment; spares and tools are included.<\/p><\/li><li><p>Shock\/tilt indicators added (recommended for overseas shipping).<\/p><\/li><li><p>Crate labeling and documentation pouch present.<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Pro Tip<\/strong>: Require the supplier to export the final parameter set and software backups <em>after<\/em> FAT and include them inside the crate and in your digital handover folder.<\/p><\/blockquote>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Wave soldering machine SAT checklist (site acceptance test)<\/h2>\n\n\n\n<p>SAT is where integration and repeatability get proven.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1) Installation &amp; utilities<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Incoming power matches spec; grounding verified.<\/p><\/li><li><p>Exhaust, air, and (if used) nitrogen are connected and stable.<\/p><\/li><li><p>Machine leveling and clearance meet the supplier\u2019s installation spec.<\/p><\/li><li><p>No shipping damage; sensors\/cables inspected.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2) Commissioning &amp; profiling<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Temperature profiling completed and saved (baseline \u201cgolden profile\u201d).<\/p><\/li><li><p>Conveyor speed verified at your operating setpoints.<\/p><\/li><li><p>Flux coverage confirmed with your flux and environmental conditions.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3) First production run (repeatability proof)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Run a defined lot; record FPY, rework rate, and key defect modes.<\/p><\/li><li><p>Verify hole-fill \/ wetting acceptability against your inspection standard.<\/p><\/li><li><p>Confirm drift checks: pot temp stability, preheat stability, alarms.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4) Training, spares, and maintainability<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Operator training completed; sign-off by your process owner.<\/p><\/li><li><p>Maintenance training completed; daily\/weekly\/monthly schedule agreed.<\/p><\/li><li><p>Critical spares onsite; reorder lead times confirmed.<\/p><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">How to write acceptance criteria into the PO (so FAT\/SAT isn\u2019t subjective)<\/h2>\n\n\n\n<p>If your PO says \u201cmachine must be in good condition,\u201d you\u2019ve created a dispute. Instead, define:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>What to test:<\/strong> subsystems + trial run + documentation.<\/p><\/li><li><p><strong>How to test:<\/strong> instrument, method, and sampling.<\/p><\/li><li><p><strong>Pass\/fail criteria:<\/strong> what values or conditions constitute acceptance.<\/p><\/li><li><p><strong>Evidence required:<\/strong> logs, calibration certificates, exports, photos\/videos.<\/p><\/li><li><p><strong>Deviation handling:<\/strong> punch list rules, retest responsibility, and timeline.<\/p><\/li>\n<\/ul>\n\n\n\n<p>For buyers still selecting the right equipment type (traditional wave vs selective vs hybrid), Chuxin SMT\u2019s <a target=\"_self\" rel=\"follow\" class=\"link\" href=\"https:\/\/www.chuxin-smt.com\/de\/selective-soldering-vs-wave-soldering-comparison-2\/\">selective vs wave soldering comparison<\/a> can help scope what your acceptance test must cover.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">Next steps (template + engineering review)<\/h2>\n\n\n\n<p>If you\u2019d like, you can use this article as a starting point and turn it into a formal, signable FAT\/SAT protocol.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>If you need a supplier who can support lead-free wave soldering and controlled thermal zones (plus selective wave options when your boards demand tighter keep-outs), you can explore S&amp;M Co.Ltd (Chuxin SMT) resources such as their <a target=\"_self\" rel=\"follow\" class=\"link\" href=\"https:\/\/www.chuxin-smt.com\/de\/slug-choosing-the-best-wave-soldering-machine-a-complete-buyers-guide-2\/\">wave soldering machine buyer\u2019s guide<\/a> und <a target=\"_self\" rel=\"follow\" class=\"link\" href=\"https:\/\/www.chuxin-smt.com\/de\/high-precision-welding-selective-wave-soldering-solutions\/\">selective wave soldering solutions overview<\/a>.<\/p><\/li>\n<\/ul>\n\n\n\n<p><strong>CTA (low-commitment):<\/strong> Request a FAT\/SAT checklist template and a 30-minute pre-FAT review with an engineer\u2014so your test plan is aligned before you get on a plane.<\/p>","protected":false},"excerpt":{"rendered":"<p>Learn how to audit a wave soldering machine before purchase with a practical FAT and SAT checklist\u2014what to test, what evidence to collect, and how to avoid costly commissioning surprises.<\/p>","protected":false},"author":3,"featured_media":4371,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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