Bed Of Nails Testing Pcb

The bed of nails test method gets its name from these protruding pins.

Bed of nails testing pcb. Bed of nails fixture test. The high price reflects that tens of thousands of dollars though the cost will depend on board and fixture size among other factors. They should already be doing this on your boards and they have a fully computerized machine that will do this pass fail testing. The first step in bed of nails testing is to design and build a test fixture for your specific pcb design.

We either use the bed of nails fixture method or the flying probe method to perform the testing in our circuit board manufacturing process. No need to provide a test rig. In circuit testing ict is the most robust type of pcb testing in existence. To test the pcbs we require the netlist file.

Once the fixture is ready to go the fabricated pcbs are pressed down one by one onto the test pins which check for electrical conductivity and compare the results to the project s netlist file. The fixture contains a multitude of small spring loaded test pins that protrude from a wide base that can secure the pcb. They will build their own for your board. In pcbcart two primary electrical test methods are being applied.

Vacuum fixtures give better signal reading versus the press down type. Bittele electronics performs 100 electrical testing on all bare pcbs produced at its facilities as per ipc 9252 specifications. The test bed looks like a bed of nails as well hence the name. Small dimples from the sharp tips of the pogo pins can often be seen on many of the soldered connections of the pcb.

Bed of nails fixtures require a mechanical assembly to hold the pcb in place. Fixtures can hold the pcb with either a vacuum or pressing down from the top of the pcb. Use the appropriate sized drill bit for the pogo pins. You should also drill alignment holes for larger pins in the bed of nails that will mate with whatever mounting holes you have on the pcb.

Devices that have been tested on a bed of nails tester may show evidence of this after the process. An ict also known as a bed of nails test powers up and actuates the individual circuitry on the board. Pcbway claims to do flying probe testing on short runs and bed of nails on larger quantities. Ate basics pcb inspection techniques functional test fate developing test strategy 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.

For either method guidelines in accordance with ipc 9252 are rigorously adhered to so that reliability of end products will be fully guaranteed.