Hi Yordan,

The files that you get WILL have faults from time to time. The key is to
make good agreements with your customer how to deal with these issues. For
example you could agree that the BOM is the leading document no matter what
the p&p data say. And it doesn't really matter who is responsible, as long
as you have mutually decided on it, and the extra costs are covered.
B.T.W. to ease the process of comparing BOM and centroid file (assuming both
are in delimited ASCII format) my program SMT-Maestro may be of help to you.
Among other things it can combine the two files and export a list of parts
that's on the BOM and not in the centroid file, and vice versa. A free trial
is available from my website, so please check it out.

Regards,

Daan Terstegge
http://www.smtinfo.net

----- Original Message -----
From: "Yordan Venev" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, November 18, 2004 5:11 PM
Subject: [TN] CAD data for assembling of PCB.


> Hi!
> As a contract manufacturer we have to deal with various products designed
> with different CAD programs. Due to this fact we are not able to generate
> all the data we need for preparation of the PCB (SMD) assembling - e.g.
> Pick&Place file. We receive from the customers BOM and mounting plan they
> are convinced that should do (many of the don't have previous experience
> with automatic assembling). We ask the customer to submit the Pick&Place
> file and ... there comes the problem - the data are not always correct.
> There were lots of cases when some components value in P&P differs from
the
> ones in BOM and even there are wrong reference positions. Since we are not
> being informed about that, we usually find out about the difference at the
> P&P equipment programming stage. Due to that we were forced either to
> perform false/true check of both P&P and BOM files or even component by
> component manual check BOM>mounting plan>P&P file.
>
> My questions are:
>
> 1. Based on the good practice is it appropriate to insist for complete,
> correct and checked P&P (and all other data) files?
> 2. Who is expected to be responsible for any mismatch in the
documentation?
>
> Any opinions are greatly appreciated!
> Best regards,
> Yordan Venev
> Manufacturing Manager
> ********************************************************
> CENTILLION LTD.
> 7-th km Tzarigradsko shosse Blvd.
> ATM Center
> 1784 Sofia, BULGARIA
> Tel. :(+359 2) 974 47 51, 965 84 95, 965 58 85
> Fax :(+359 2) 974 47 52
> mail to: [log in to unmask]
> www.centillion-bg.com
>
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