The spring-loaded pins are available with a variety of different pin heads, which are chosen according to the type of test point contact to be made (via hole, solder pad, component pin, etc). Typically, test pins consist of two parts: 1) a receptacle which is mounted in the fixture plate and wired to a connector, and 2) a spring loaded pin which is inserted into the receptacle. For boards with test points on both sides, it is possible to design an upper fixture with test pins. The standard jig is delivered with an upper fixture with slots that allow you to place press pins where appropriate. Test pins and other accessories may be ordered together with the test jig and fixture, either directly in Macaos Enterprise, or from our online webshop. It is delivered with holes drilled for the test pins, guide pins, connectors, etc. The lower fixture of our standard test jig is a box with hinged top and bottom. Ideally, all test points should be accessible from the bottom side of the PCB.
In addition, a few guide pins are placed at mounting hole locations in order to properly align the PCB with the test pins. The PCB is placed on top of the pins and then pressed down so that the pins make good contact with the test points. Test fixturesĪ "Bed of Nails" test fixture is a plate with an array of spring-loaded test pins (or Pogopins) which are mounted in the fixture so that they will make contact with desired test points on the PCB.
The test fixture module (in Macaos Enterprise and Macaos Gallery) allows you to design a test fixture by simply clicking on the test points in your board, and assigning each pint with a pin type (and appropriate labels for a wiring list, if desired). Macaos has developed a simple and cost-effective jig for in-circuit testing.
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