Going on the assumption that you are supplying Gerber format data to the
PWB supplier, all this can be simplified by using Gerber 274X format, which
has all aperture data included in the data file.  In addition, the PWB
supplier has less chance for error.

Alex

----------
> From: Johannes Sivula <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] Aperture Wheel ? P/N ?
> Date: Friday, May 08, 1998 9:06 AM
> 
> Hi,
> 
> Perhaps there is someone who knows what this is about:
> 
> We tried out a new pcb supplier. The first protos were fine, and we
> purchased a bigger batch.
> Even these pcb´s looked fine, with an exception; All the pads were
rounded,
> so they haven`t
> used our apertures at all !!
> Rounded apertures are for my part OK, but question remains, how this
could
> possible happen.
> I asked this question and I got this as an answer:
> 
> 
>      "The reason of the problem is human error.  For any new P/N we load
> the Aperture
>       Wheel in our Cad system in this case the operator made a mistake (
> didn't consider
>       the shape 1-2).
>       To avoid this problem on the future production, we propose:
>       -Aperture wheel standard
>       -Specific program-script to load the aperture wheel in automatic
way
> in our Cad system"
> 
> Forgive my ignorance, but I don`t know what is:
> 
> -P/N
> -Aperture Wheel
> -Which kind program-script is he/she referring to ?
> 
> I am asking this because so far I haven`t got the answer  from the
> supplier. I am just curious.
> 
> Brs, JoSi
> 
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