Jim:

We just went thru a similar issue with our "FORMER" PCB supplier.  If that
was their response, make this RMA the last correspondence with their PCB
house.  You are having these boards manufactured on the panel so Bow and
Twist is still a factor.  I am being driven crazy by customer service in
this industry.  Thank goodness for IPC and a place to vent.  Heck, if they
don't RMA these panels, just spread the word to us TechNetters so we'll know
who not to waste time with!!!  But hell I bet we could all tell you the same
story.

When will the powers that be ever learn?  After three RMA's out of four PO's
in December, the supplier actually had the audacity to call and ask why they
haven't seen any business lately!!!  Excuse the pun but I wanted to tell
them to do the math!!!

Low Cost Suppliers = Low paid employees + POOR QUALITY

Ken

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Marsico, James
Sent: Thursday, March 14, 2002 7:49 AM
To: [log in to unmask]
Subject: [TN] Board Bow and Twist


I think this is a no-brainer, but here goes...  We were delivered boards in
panel form from one of our suppliers.  At Incoming Inspection, the panel was
rejected for excessive bow (>75% for SMT) and returned the supplier.  The
supplier called me and said that even though the panel exceeded the bow
requirement, the individual boards were acceptable.  When I quoted the bow
and twist requirement from IPC-6012, "Panels which contain multiple printed
boards which are assembled on the panel and later separated shall be
assessed in panel form." , he said yes, you measure the individual boards in
the panel.  I need clarification.
Thanks,
Jim Marsico
Senior Engineer
Production Engineering
EDO Electronics Systems Group
[log in to unmask] <mailto:[log in to unmask]>
631-595-5879

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