On 01:44 PM 17/05/2001 -0700, Abd ul-Rahman Lomax said:
>At 04:08 PM 5/17/01 -0400, Richard Sumner wrote:
>>Alas, the aperture limit is not available if you choose rs274x.
>>Not all pcb houses can manage large "apertures". Advanced circuits is
>>limited to 1"x1", for example.
>
>Usually such large apertures are created by fills. Protel had a bright
>idea to save gerber file size by flashing fills with an aperture created
>just for the fill, instead of drawing it with a square aperture.
Protel used to draw all fills - they even had an efficient method for doing
so using the fattest available apt for the middle and the filling in the
edges with a much smaller apt - worked well even if you only had round apt
in your apt file.
I suspect the algorithm is all still there - just need the ability to set
the maximum apt size for embedded apts and to force all fills to be
drawn. I think, Mr Protel CSC, that you can take all this as a
suggestion. Can't be hard to implement and it would seem you prevent some
alienation of some PCB houses - which is always a good thing marketing wise.
Ian
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