Hi, Ioan
It's called GAGE R&R. This can be done with any scrap CCA assembly, or a few assemblies.
You can bring it up to "golden" status with a careful and very thorough inspection, then do any touchup and rework for any defects found.
After it is cleaned, have the inspectors inspect it to verify there are no undetected defects or anomalies (benchmark). Then introduce defects. Pick some out of the IPC-610D pictorial examples, the ones that are important to you for your products, and duplicate them on your golden board(s). I would induce some "acceptable" and some "reject" conditions. It is assumed the board starts out with all "preferred" workmanship. Be sure to include many defect types, such as missing epoxy, PWB corner damage, slightly bent connector pins, chipped solder mask exposing weave or copper, in addition to the many solder defect types. Slip in a couple of unauthorized/improper repairs, too.
You can use IPC boards such as the MTTC. These can be used as proficiency samples for solder training, and when finished you can re-use them for the above purpose. You can order these from IPC.
Save these boards with the induced defects. You can use them later when you look at the results of the GR&R and decide to purchase an AOI machine instead.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
Sent: Thursday, May 07, 2009 3:20 PM
To: [log in to unmask]
Subject: [TN] Inspector evaluation boards
Dear Technos,
We think about implementing a means of evaluating the efficiency of the inspectors. One idea would be having them inspect a certain quantity of boards assembled with different known defects, both in terms of placement (polarity, position, etc.) and workmanship.
Is there anybody out there manufacturing this type of evaluation boards?
Also, what are you doing to evaluate and qualify your inspectors (QC and end of SMT line touch-up people)?
Thanks,
Ioan Tempea, ing.
Ingénieur Principal Fabrication / Sr. Manufacturing Engineer
30 ans déjà! - Already 30 years!
950 rue Bergar, Laval, Québec, H7L 5A1
t : 450-967-7100 ext : 244
Mtl : 514-990-5762
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www.digico.cc <http://www.digico.cc/>
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