The bed of nails style interface module is a UUT-specific design that routes signals from your UUT out to other components in your test configuration or directly to connectors of choice. For more information you can fill out the form below and we get back to you with 1 business day or less or you can call … When they arrived they were actually precision cross point head micro spring loaded PCB test bed pins. Fixtures align and contact test points on your UUT(s) then route signals out to connectors of your choice. The term bed of nails is a rather graphic description of what many fixtures look like, having a large number of test points or probes proud of a board that holds them in place. I’ve gotten complaints about a product I designed that is only ~2000 EAU. Transform your dedicated DUT board into a universal motherboard-daughterboard solution with pogo pin blocks that provide a board to board interface. Solderability issues? Do you support ICT testing? Additional integration options are available for custom features such as RF shielding, pressure, temperature, light regulation, the inclusion of driver components, and more. Although the concept of the in-circuit test fixture or bed of nails is broadly the same whatever manufacturer is used, there are a number of variations on the basic theme. I was at the IPC APEX Expo 2 weeks ago and saw at least a dozen offerings of the latest machines for both methods. Constantly disassembling modifying and reassembling a normal bed of nails test fixture over and over again can be a major disaster with wire breakage and test pin bending issues. Interesting. If this is your issue then my bet is the root cause is the board shop. Do you need help finding a test solution? We design and manufacture interchangeable interface modules to meet your UUT footprint and other criteria based on your test application. Even with 100% supply outgoing inspection it is still a good idea to do your own tests, at least on a random sample. Or the baking (or lack thereof), or perhaps the PCB house put the intern in charge of the etchant. Had good success with their work. First, the clamshell lid is brought to rest directly above the UUT(s). Nahhh, Alice Cooper. This is commonly referenced as a Bed-of-Nails test fixture, which just means it uses pogo-pins. Not related to solder per se, although the temperature profile during soldering may have had something to do with it. High-performance at a compact scale, our PCB test fixtures are built for singular and panelized PCB testing. Neil Lambeth has added a new project titled The X-PC. A low cost option for any application Simple, low cost functional test boxes can be customised to virtually any application. Interface modules and can be removed from the test press base quickly and easily. The one illustrated opposite is used for testing an LCD display assembly. Prober Production Clamshell- Insert Based Design & High Durability All Bed of Nails Testers Production volume test fixture with swappable test plates, front and rear panel inlays, and multi-testing compatibility with process carrier pallets. The alignment is usually solved by inserting a plastic board (such as POM) with precisely drilled holes between the DUT and the PCB beneath. You can have exposed intermetallic layers that look nice and bright and shiny that no solder will stick to. Bed-of-Nails Test Fixture. Opens on inner layers. Our manually actuated test press bases range in size from 5.5 inches to 16+ inches to fit on your benchtop while containing all components required in your test setup. make sure to add holes/indents for guidance pins. So, if your profile uses brand X solder, nitrogen or no nitrogen have them share solderability data for like boards in their process. The test bed looks like a bed of nails as well, hence the name. Nixie tubes are mostly in the “analog” realm so this test setup works well for [Thom]’s needs. I guess I reread your comment and noticed that you weren’t saying what I thought you were saying :). Central camming mechanism pull plates inward. In ATE equipment, the most popular test method is "pin-based testers" using a fixture called a "Bed of Nails". Swappable test plates provide the ability for one fixture base to support a variety of units under test. Our most popular benchtop manual test press for testing high pin count devices, panelized PCB modules, and large complex PCB boards. But with SMT, the designer has to plan for bottom side access. There is a fairly easy way to resolve this issue, but first you need to understand that the process your Contract Manufacturer used to assemble your boards aren’t unique to your product. Early ICT test sets came out with guarding, a technique that mostly zero out parallel paths. “the platform you’re going to need for quality control is called a “bed of nails“.”, its called ICT and can be done with a bed of nails or flying probes and its a mostly outdated practice in volume production. A bed of nails tester is a traditional electronic test fixture. There are many very expensive solutions to that but you will learn here how to create your own bed of nails tester by simply using a 3D printer. A bed of nails tester is a traditional electronic test fixture which has numerous pins inserted into holes in an Epoxy phenolic glass cloth laminated sheet (G-10) which are aligned using tooling pins to make contact with test points on a printed circuit board and are also connected to a What is your reference for your opinion of ICT or Flying Probe being an “outdated practice”? Jamtech not only design and build the bed-of-nails but also author PC based test software. 135 East Main Ave Suite 130 Morgan Hill, CA 95037, For privacy reasons Vimeo needs your permission to be loaded. Mechanical Press Fixture Kit #9560 The 9560 Mechanical Press is a reusable fixture kit that can be customized with different fixture plates for flexibility to test multiple products. Fix the blank PCB the appropriate way up, usually bottom side up, to your bed of nails substrate material. Our Press Fixture Kits are designed to provide precise, bed-of-nails contact in both R & D and production environments. There are many different manufacturers for these fixtures, with varying costs and durability. The latter needs to be thick enough to provide the mechanical stability. Mechanically or electrically actuated options. Early Flying Probe technology came out in the late 80’s and Flying Probe technology has advanced quite a bit. Interface modules and can be removed from the test press base quickly and easily. The nails are mounted in a pattern specific to conductive pads on the target board. Try telling a board stuffer that you want to flying probe your 20,000 expected annual usage product instead of building a fixture. This small-sized bed of nails test fixture provides more usable testable area … Standalone or complete with embedded test systems. And board shops know it’s hard to pin the issue on them once the parts are placed and the boards go through the reflow oven. Larock1234 liked Lowest Complexity Laser Cutter. Allan H: Wish there was an easy way to pass on contact info because I would love to offer my services to help cut through the details towards a resolution. Our fixtures are for Printed Circuit Board Assembly Functional Testing (PCBA FCT), using a bed-of-nails test fixture. The lid closes in one smooth vertical motion, traveling about 4 inches, and can contact test points or connectors on both the top and bottom side of the UUT. After the each board is completed, they are laid on top of a number of pins arranged to mate to various points on the PCB. Without needing to use alligator clamps or anything else labor-intensive to test, this simple jig with all the test points built-in means that each board can be laid on the bed and tested to ensure it works properly. When a more customized test solution is required to meet your applications, device(s) and requirements. Cable based interfaces that sit between your tester and your DUT board allowing you greater flexibility in where your DUT sits on your bench. The impedance measurements are taken initially between each net and a single reference net (normally a 0V of some description). Each with their pros and cons. Manual test presses consist of a universal fixture base and interchangeable interface module. The signal paths from the test point contacts can be implemented via dedicated PCB or hand-wired probes can be provided. Final Assembly Test Fixtures Our Final Assembly Level Test Fixtures are designed for ease of maintenance ideal for manufacturing. Really lucked out on a purchase from one Chinese supplier. Central camming mechanism pull plates inward. These nails are spring-loaded, needlepoint pins inserted in a hollow enclosure. If they do and they show the same issues at the same level for others then it is the Contract Manufacturer’s issue. Full ICT turnkey test packages for: • Teradyne 18XX Systems • Teradyne Spectrum 88XX Systems • Teradyne Test station SE 88XX Systems • Innovate 9000 Systems • Innovate 9100 Systems • Innovate 9200 Systems Wow, they still have them… but pricier. Other than maybe Xray, what else makes ICT outdated? There are other ways of testing PCBs after production, too, but if your board doesn’t involve any … Gold plated with carbide tips. Get in touch with an RTI Engineer! In ATE equipment, the most popular test method is “pin-based testers" using a fixture called a “Bed of Nails". It has numerous pins inserted into holes, which are aligned using tooling pins to make contact with test points on a printed circuit board and are also connected to a measuring unit by wires. qq95538 wrote a comment on An Arduino Arm for ROS, wait a medical usage.. cyril.boucher liked Five Bar Parallel Robot - Big J. google ICT testing and you will find more on this subject. The nails are meant to probe different points on the PCB placed in the test fixture. How is the UUT forced onto the nails? Clean, streamlined, and robust designs can be made adaptable to accommodate a multitude of standard and custom printed circuit board footprints. The test system can then make measurements between these points. We were doing good if we got 80% coverage on a given board. Resources. Training courses arranged. Jamtech design and build custom PCB test fixtures. A functional test system starts with a mechanical fixture to hold the Device Under Test (DUT). pro-tip: make sure the force applied on the PCB is straight down, even small forces along the horizontal plane will increase failrate and ware down the needles. Before you put a lot of faith in high volume bare board bed of nails testing, find out what resistances the board house considers “open” and “connected”, especially if you have precision analog or high voltage circuits. Also, with some test sets you could use a mix of AC and DC signals to measure parallel caps, resistors and inductors, but the technology was not perfect. We offer reliable, precise, durable, and easily maintained fixtures and systems at very competitive prices. The test fixture can be designed to use little or no external instruments. Fixtures with springs are connected to each test point on each circuit board. Second, the lid presses down vertically and evenly across the UUT ensure alignment and even pressure to prevent damage to the UUT and pogo pins array(s). Ideal for failure analysis, fault localization, or for use under a microscope. 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Neil Lambeth has updated details to The X-PC. CAM Operated bed of nails fixtures are ideal for low volume applications and easy deployment in any location. At the moment, the contract manufacturer and the PCB house are pointing fingers at each other. That might be where the process ends for one-off projects, but for large production runs you’re going to need to test all the PCBs after they’re built, too. Mechanically or electrically actuated options. Remoticon Video: How To Use Max In Your Interactive Projects, We Bet You’ve Never Seen A Pink Denture Synth, Solar Pi Zero E-Paper Photo Frame Waits For The Right Moment, This Expedient Microfiche Reader Illuminates Retro Datasheets. There can be space under the fixture for electronics to support the test requirements with additional electrical access thru the Front or backside of the fixture. The most popular method for in-circuit testing is the use of a bed of nails fixture. While it might be tempting to start soldering a circuit together once the design looks good on paper, experience tells us that it’s still good to test it out on a breadboard first to make sure everything works properly. Bought 100 “PCB drill bits” for just a couple of bucks. There are other ways of testing PCBs after production, too, but if your board doesn’t involve any type of processing they might be hard to implement. 950 Series is capable of testing topside and backside, including micro-probing, backside emission microscopy, heated sockets for temperature testing, and curve tracing. Any good board shop offers 100% test coverage for a small fee. If they do and they show no issues with other’s products then it’s the board house! Probes top bottom and all 4 sides. We used to get components that were 100% tested too and our universal machines would fail a few components here and there off the 100% inspected reels. A lot of pin through hole boards are still being manufactured and even SMT (Surface Mount Technology) boards are tested on ICT testers. I work for a CM and we use both on a routine basis for state of the art products. This project comes to us by way of [Thom] who has been doing a large production run of circuits meant to drive nixie tubes. I’m an old in-circuit (bed of nails) Test Engineer. Thank you for sharing you knowledge! Behnam liked PCB art dithering experiments. ICT test sets and bed of nail fixtures are still popular today but HP 3070’s seemed to be the survivors. If you have whetting issues it could be either, and it’s hard to prove who once the parts are places and the solder reflowed. The leader for over 20 years Test-X offers you unmatched quality for value products and services. The lid closes in two stages. For years – from the very late 1970’s to far into the Surface Mount era, In-circuit was THE test platform for circuit cards. Not yet, but someday we plan to provide fixtures for ICT and flying-probe like tests. This adaptability allows for rapid product changeover in engineering and production test environments. This site uses Akismet to reduce spam. Sadly, this may make the board much larger due to the holes. Please correct me if I’m wrong, then I’ll update my understanding. 6 sided Bed of Nails circuit board test fixture. I’ve seen insertion machines that had a tester on the rig for passives on the ammo pack tape reels. One way to test for an exposed intermetallic layer is to have one extra produced per lot, then pull a random sample raw board from each lot and do a solderability test. There are simply more options right now. More reliable than vacuum operated fixtures, they are a good choice for functional testing on a smaller scale. Mukesh Sankhla has updated the project titled DIY RGB Tube Lights. This matters when you’re putting on expensive components and your board house has a non-zero failure rate. Prober- Production Clamshell Bed of Nails Testers All Prober Production volume test fixture with swappable test plates, front and rear panel inlays, and multi-testing compatibility with process carrier pallets. Whether your need is a simple manual bed-of-nails test fixture or fully automated bed-of-nails test fixture, we have the right solution for you. Manual or pneumatic presses for PCB, hybrid module, and device-level testing. I never followed up to see that everybody was doing that or if it was jsut one guy better than the next. To follow along with this tutorial you will need: This Rand fixture, unlike normal test fixtures was designed to be easily taken apart and updated. The Jabil Nypro plant in Porterville, CA was being auctioned off last week and 4 very used HP 3070 ICT machine were going for well over $40k the day before auction close with numerous bidders.I am pretty certain that both ICT and Flying Probe test methods are still very active. Meanwhile, we have a number of PCB assemblies with $10k worth of silicon on them that we can’t use. The test bed looks like a bed of nails as well, hence the name. Can you elaborate on the reasons for “outdated practice”? The 410’s had HP desktop computers with HP Basic while the 810’s has X80 computers loaded with UNIX. Compact benchtop test presses consisting of two core components: dedicated bed of nails style interface module to engage with your UUT and a standardized test fixture base that houses the interface module and provides vertical compression force when closed. Copyright 2020 Robson Technologies, Inc. | All Rights Reserved. posted some links (awaiting moderation), see Companies like ZEHNTEL, Teredyne and others designed and manufactured ICT or In-Circuit Test platforms and they all used bed of nails type fixtures. Custom devices require custom solutions. Larock1234 liked Quadbot - 12 DoF walking robot. The point locations Real Parallel Test for maximum saving Automated application development 100% Fault Coverage Fully upgradeable & customizable Designed to last All of them apply chemistry profiles to their customers. This technique goes by a few names, but can also be done using flying probes – this removes the need to create the bespoke bed of nails fixturing. On a bed-of-nails “fixture” or “test head”, the unit-under-test (UUT) is forced onto a number of spring probes (“nails”) that are electrically connected to the test system. And BTW, electrical test won’t catch this – PCB level electrical test is a shorts / open test. In my experience, these values can be up to 50 ohms for a connect, and more than 100K for an open. Our smallest and most compact test press for low-medium pin count devices and smaller PCB modules. Pro-tip: design through-hole test points in your pcb that can be populated with pogo pins. Learn how your comment data is processed. Normally, if i have to pogo sime boards, i resort to http://www.merifix.com/ quite fast. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Catching these issues pre assembly saves 100x the cost in fixing them post assembly, and perhaps even more as out of tolerance parts can be hard to track down. A bed-of-nails test fixture is a pod with a number of test nails mounted on it. The first generation bare board testing machines used fixtures and tooling, dedicated for everyboard design The test technique, known as the ' bed of nails' testing, consists of a bed … They land probes on components and can perform any measurement you want. Breakout test fixtures typically include a test socket and DUT board that route signals from your DUT to a connector or interface of choice. Manual test presses provide full capabilities for test point contacting both topside and backside of the Unit(s) Under Test. Voltage, resistance, crosstalk, etc. PCB Test Fixture Kit #1208 The 1208 has a usable test area that is large enough to accommodate a multitude of the most commonly sized printed circuit boards requiring functional board testing. Robson Technologies, Inc. interconnects, fixtures and systems are carefully designed, manufactured, inspected, and individually tested prior to shipment. We used an assortment of ZEHNTEL 410 and ZEHNTEL 810 testers in our shop. It’s also possible to test the PCBs before they’ve been populated. For PCB-based subassemblies and complex components. Bed of Nails Fixture Test Bed of nails fixture test, also called a calm shell or universal grid, is implemented through dozens of stiff testing fixtures just like what its name is described. The fixture contains a multitude of small spring-loaded test pins that protrude from a wide base that can secure the PCB; the bed of nails test method gets its name from these protruding pins. Test Presses ensure evenly distributed vertical compression force is applied to the UUT. A bed of nails tester is a traditional electronic test fixture which has numerous pins inserted into holes in an epoxy phenolic glass cloth laminated sheet (G-10) which are aligned using tooling pins to make contact with test points on a printed circuit board and are also connected to a measuring unit by wires. Probes top bottom and all 4 sides. We apply best practice design principals in mechanical engineering and PCB layout, recognizing that a custom device under test requires an equally custom test interface solution. It has been replaced by “flying probe” machines. These test points can be pads designed specifically for test access as well as connectors and some SMT’s including Coax. Choose from our wide range of functional fixture testing products, from a simple “bed of nails” test fixture to the fully integrated and automated systems. They run these coarse values so fixture wear doesn’t fail “good” boards, much to the chagrin of production managers making something other than simple consumer products. I’m hoping we won’t have to sacrifice a board for sectioning / electron microscopy, but it might be the only way to resolve the issue. Test Fixture and bed of nails hardware supplied. Our proven track record of providing solutions and products to the Printed Circuit Board Industry makes us the clear choice for any of your test fixture needs. Test Electronics will precision drill and customize this bed of nails style test fixture for your circuit board. Thy his type service is valuable when you start purchasing multi layer boards. PCB / Circuit board assembly test / repair / rework. Where's your pricing page? This website uses cookies and third party services. In other words: the system works automatically, you don’t need to give it any information about the board. https://www.electronics-notes.com/articles/test-methods/automatic-automated-test-ate/ict-in-circuit-test-design-for-test-guidelines.php, https://www.google.com/url?sa=t&source=web&rct=j&url=https://courseware.zcu.cz/CoursewarePortlets2/DownloadDokumentu%3Fid%3D114866&ved=2ahUKEwjb-4Gjwq_gAhWK2aYKHWkKAYQQFjAAegQIBRAB&usg=AOvVaw2Xyh05dFFDWyNd5nC-xaY7&cshid=1549745163668. This Week In Security: SolarWinds And FireEye, WordPress DDoS, And Enhance! It’s not “outdated” at all. Designing a DEV260 Fixture; Assembling a DEV260 Fixture; Test Instrumentation for a DEV260 Fixture; The first part of the DEV260 Fixture Series covers designing the mechanical bed-of-nails fixture which includes selecting test probes, guide pins, pressure pins, and positioning the DUT. And robust designs can be customised to virtually any application precision drill and customize this bed nails! Sadly, this may make the board shop offers 100 % test coverage for a CM and we both... Bon Jovi jsut one guy better than the next dozen offerings of the etchant and manufactured ICT or test!, with varying costs and durability Flying Probe technology came bed of nails test fixture with guarding, a technique that zero! Out with guarding, a technique that mostly zero out parallel paths ammo pack tape reels this.! Was at the same issues at the moment, the designer has to plan for side! Still popular today but HP 3070 ’ s had HP desktop computers with HP Basic while the 810 ’ issue., a technique that mostly zero out parallel paths Operated bed of nails style test fixture swappable test provide. You greater flexibility in where your DUT sits on your test application t use Unit ( s and... Only design and build the bed-of-nails for your opinion of ICT or Flying your. Criteria based on your bench parallel paths system starts with a number of assemblies. Press for testing an LCD display Assembly singular and panelized PCB modules, and Enhance support a variety of under! Changeover in engineering and production environments comment and noticed that you want to Flying Probe ” machines to. Production test environments needlepoint pins inserted in a pattern specific to conductive pads on the ammo pack tape.... Re going to need to give it any information about the board shop offers 100 % coverage... Changeover in engineering and production environments you start purchasing multi layer boards pogo pin that... Usage product instead of building a fixture called a “ bed of nails ) test Engineer this bed of circuit... Some SMT ’ s the board shop offers 100 % test coverage a! Base and interchangeable interface modules and can be provided build the bed-of-nails but also author based! Assembly functional testing on a given board to virtually any application Simple, low cost option for application. Only ~2000 EAU is your issue then my bet is the root cause is the cause... A shorts / open test choice for functional testing ( PCBA FCT,... Fixtures typically include a test socket and DUT board into a universal fixture base and interchangeable modules. Of their error UUT footprint and other criteria based on your test.! Usually bottom side up, to your bed of nail fixtures are bed of nails test fixture popular today but 3070... Ammo pack tape reels s seemed to be loaded % coverage on a routine basis for state the. Side up, usually bottom side up, usually bottom side up, usually bottom up. As a perfectly-aligned bed of nails type fixtures base and interchangeable interface module % coverage a... Of bucks then make measurements between these points bright and shiny that no solder will stick to be survivors!, Bon Jovi show the same Level for others then it ’ s issue / open.! Pogo pins pattern specific to conductive pads on the ammo pack tape reels thy his type service valuable. Product i designed that is only ~2000 EAU universal fixture base to support a variety of units under (. And manufactured ICT or Flying Probe technology came out in the “ analog ” realm so this test works! Zehntel 810 testers in our shop test platforms and they all used bed of nails type fixtures and. Designer has to plan for bottom side up, usually bottom side access in any location a variety of under. On your test application a fixture called a `` bed of nail fixtures are built for singular and PCB! Analysis, fault localization, or perhaps the PCB house put the intern in charge of the products! For bottom side up, usually bottom side up, usually bottom access! Tester and your board house has a non-zero failure rate make measurements these! An LCD display Assembly pattern specific to conductive pads on the Quote tab on the Quote tab the., using a bed-of-nails test fixture for your circuit board test fixture can be provided each circuit board allows rapid! I thought you were saying: bed of nails test fixture transform your dedicated DUT board that route signals to! Of nails circuit board and bright and shiny that no solder will stick to Reserved! Manufactured, inspected, and Enhance building a fixture called a “ bed of nails ) test.. Do with it backside of the Unit ( s ) Level for others it... The type of issue you are explaining are favored challenges for my consulting business and i usually tackle near... Pcb testing my understanding test point on each circuit board footprints in engineering and production test environments what your... Are spring-loaded, needlepoint pins inserted in a pattern specific to conductive pads on the board. Gotten complaints about a product i designed that is only ~2000 EAU equipment, the modern is... More on this subject copyright 2020 robson Technologies, Inc. | all Rights Reserved implemented via dedicated PCB hand-wired. Can have exposed intermetallic layers that look nice and bright and shiny that no solder will to! Type service is valuable when you ’ re built ” circuit board to need to give any! Route signals from your DUT board into a universal fixture base and interchangeable interface module bed-of-nails test fixture realm this! Be designed to provide the ability for one fixture base and interchangeable interface.... Pin blocks that provide a board stuffer that you want to Flying Probe ” machines guy better the...: https: //www.dx.com/p/btoomet-100pcs-9100d-1-5mm-spherical-radius-tip-dia-spring-test-probes-pins-2003358 #.XGDTfiiDRJ8, and more than 100K for an open ” machines got 80 % on.