The best way to take the error out if possible is to reprocess the data in
the design data base and output in 274-x format


Highest Regards,

William W. DeCray III
Waytec Electronics Corp
Engineering Services Manager
PHONE:(434) 237-6391 ext 115
CELL:   (434) 851-6115
FAX:    (434) 237-1324
E-mail:<[log in to unmask]>
Web http://www.waytec.com
FTP  ftp://ftp.waytec.com


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Andre Leclair
Sent: Tuesday, March 11, 2003 7:55 AM
To: [log in to unmask]
Subject: [TN] Aperture Data


Morning all

I have a question regarding Aperture List for Gerber Data.  This is an area
I know little about so bare with me.
We had an incident with a PCB house which resulted in the boards being
manufactured with all traces/pads 0.020" bigger then they were supposed to
be.  The shop said the problem arouse do to the way the aperture list was
set up.
The list has a set of 24 station #s with dimensions (which I understand get
translated to d-codes).  These Station#s are then repeated further down
plus have extra #s to 999.  We noticed that some of the dimensions in the
2nd set of station #s are differant from the 1st set. The 2nd set are the
correct #s.
The shop tells us their software (Infinite Graphics) will import the 1st
set then ignore the 2nd set of repeated #s then will continue to import any
station #s that are differant.
When we look at the Data with GC-Place and look at the used Apertures we
get the correct values.
Could the error be due to a differance in the way the software interprets
the list?..
The customer's data was created using P-Cad at least 10 years ago.  The
format the Lists are in are the same for all the customers product.  A
previous PCB shop had no reported difficulty.

Any ideas would be helpful
Thanks
Andre

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