I want to clear thing up a bit, the way Allegro outputs Gerbers in the
RS274X format, it is fully compliant with the format, and it works great
for using Positive copper shapes for planes, really brings down the
files size.
What is really happening, is that each layer that contains positive
polygons is made up of composite layers, this is done by the use of
aperture MACRO function on RS274X.
If you Fab house cannot read fully compliant RS274X gerbers I suggest
you change Fab houses now.
All FAB houses I have used in the past had no issues with RS274X Here in
the US and Overseas ASIA.
By the way IF you use Mentor Graphics pads, it also has the option of
using aperture Macros. Best way to output RS274X
I would suggest if using Allegro to output ODB++ it is superior to
RS274X in terms, that the netlist is already embedded with the CAD Data.
Iwish Pads had that feature.
-Patrick

Pat Johnson wrote:
> If you are dealing with Advanced Circuits or another house using Valor or
> Genesis, and if they have not been trained properly, they have issues reading
> RS274X from Allegro.
>
> I just went through that routine with them just a few months ago. And the
> conclusion was that they didn't know how to use their "tool" for multi-layer
> RS274X especially in Allegro flavor.
>
> Pat J
> Compu-Tier
>
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--
Patrick Jabbaz
Ubiquiti Networks
495-499 Montague Expwy
Milpitas, CA 95035
T: (408) 942-3085
M: (408) 621-6533

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