Error Proofing on Soldering Points

The high end automated testers using a bed of nails or flying probe would probably be overkill for 12 wires. You might be able to use some image processing software to analyze the solder pads for solder. The other posssibility is to incorporate some BIT (built in test) circuitry on the PC board. What quantity of boards are you dealing with. That will determine what level of automation will be economical.

Thanks for ur inputs LG

The quantity we are dealing with is around 2 k per month. I was looking into some kind of latching circuits that would latch one at time after u soldered one point and after 12 points are soldered, a buzzer or a visible annunicator lites up to confirm the job is done

U are quite right in saying the bed of nails and other might be an overkill.

Thanks

Moomoo

The shortest best way is to use another pair of "supervisory eyes" to do a QA check prior to the next step.

I am going to presume Capping is Potting or putting the PWA(board) in some epoxy material to seal it.

You could set up a test jig to connect the wires to and exercise the PWA.

It all comes back to the value of the PWA and the amount of financial headroom there is to do the job properly.

The best way is a well trained and motivated operator who understands the importance of the job, and the implications of getting it wrong. Let them be resposible for their own work, and show that good quality is appreciated over speed.
You can't inspect in quality, you have to actually build it right in the first place.
Getting them to hold it up to the light, may well be simple and effective.
Failing that, employ an overpaid QA consultant to alienate the work force and squander your money.
<click> cynical mode OFF
Del

Yup, pulling 'em seems good to me.
You get a GA on your own thread!
Del

GA to the OP.

Isn't an appropriate bit of force always the best test? Potentially destructive but it sure sorts out the weaknesses.

You can count the movement of soldering iron by intercepting light beam with solder Iron/hand.It should count 12 for each PCB,

Well m not too sure of that , cos the width of the hand or soldering iron is much bigger than the pitch of the pins.

Thanks for ur inputs

I have observed one company that had a much more complex operation but still the end product was the same as yours. It was automated and they basically poured liquid solder over the board. The board was covered in such a way that the solder only attached itself to the points where the wire was sticking through the holes. No missed connections.