Hi Graham,
Flying probe is an advanced tool, which can measure a lot of things and help a lot with debug. Don't quote me on this, but I believe it could also program flashes and ASICs. Very useful in development, cumbersome in production, as test time is extremely long, compared with ICT, which is the actual production tool. Your double sided 500-part board might take between 30 minutes and 1 hour to test.
Claims of programming in a few hours are grossly exaggerated. I mean it will regularly take at least one week to get the program done and somewhat fine-tuned. It is very hard to get customers to pay the NRE that comes with flying probe.
You will need an advanced technician, maybe an engineer to program this, as it requires knowledge of electronic circuits and components, because the programmer will need to make decisions on where to probe, which nodes to consider, what tolerances to set on measured values, etc.
Forget about gerbers, you'll need the ASCII CAD file, the actual design project in ASCII format, you might want to ask your customer if they're ready to provide this, as many are reluctant to hand the CM their full PCB database. You will also need the schematics.
Best regards,
Ioan Tempea
-----Message d'origine-----
De : TechNet [mailto:[log in to unmask]] De la part de Graham Collins
Envoyé : Tuesday, November 25, 2014 8:48 AM
À : [log in to unmask]
Objet : [TN] flying probe testing - benefits and drawbacks?
Good day TechNet
We have a customer asking us to look at implement flying probe testing on their products. We currently do AOI on all, and x-ray and functional test on some of their products, we do not have a flying probe machine.
I've got some notions of the benefits and drawbacks of these machines but as I have no first hand experience I figure I should ask here for opinions.
Assume an entry level machine for the sake of discussion, and without significant add-ons. Top side probes only, probably 4 probes.
Assume a double sided board with 500 components, only passives on the bottom side, and fair accessibility.
My questions:
- Claims are that the current crop of machines can be programmed in "a few hours", is this realistic?
- Do I need anything from the designer on top of the usual gerber and BOM (e.g. a netlist, or other format of data?)
- What kind of run time am I looking at? I understand with a single side machine I will have to run the board twice to get the best coverage possible.
Thanks! Any opinions are appreciated.
--
regards,
Graham Collins
Senior Process Engineer
Sunsel Systems
(902) 444-7867 ext 2211
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
|
