Wow, Jim. This is deja vu. I had the exact same discussion here about a year
or so ago. The position I took (based on what I thought was good common
sense) echoes most of the responses you received. I am building the panel,
not individual boards, so the panel has to meet the spec.  What good are
"in-spec" individual boards if the panel won't go through the process?

Bob

=======================
Robert Barr
Manufacturing Engineering
Formation, Inc.
Voice: 856-234-5020 x3035
Fax: 856-234-6679

> -----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
>
> ------------------------------------------------------------------
> ---------------
> Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL
> To receive ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search previous postings at: www.ipc.org > On-Line Resources &
> Databases > E-mail Archives
> Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
> information, or contact Keach Sasamori at [log in to unmask] or
> 847-509-9700 ext.5315
> ------------------------------------------------------------------
> ---------------
>

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------