Re: Gibbions Files? PCB Design

Le Sun, 02 Sep 2007 19:35:31 -0700, John Larkin a écrit:

On Sun, 02 Sep 2007 18:40:03 -0500, Al in Dallas <alfargnoli@xxxxxxxxx>
wrote:

On Sun, 02 Sep 2007 11:12:53 -0400, PeteS <axkz70@xxxxxxxxxxxxx> wrote:

Eeyore wrote:

John Larkin wrote:

Chull13 <chull13@xxxxxxxxx> wrote:

Thanks!
It was Gerber he said!
I'll see if they can take what Eagle puts out.
There should be a Gerber file for each layer, an aperature file, and
a drill file. Eagle should make them all.

However, my understanding is that making sure they are 100% correct
is not a trivial task.

Agreed


At the very least you should preview your gerber files.
http://www.graphicode.com/pages/home.cfm?variable=18#_GC-Prevue

Graham


I have not used Eagle for the entire design process, so I am not aware
of the options available, but in the packages I _have_ used, there are
numerous (and to the untrained eye confusing) options for gerber
(RS174X, incidentally) outputs. Some manual tweaking of the output
options is often required.
Having said that, every layout package I've used had an output option
to generate gerbers using the layout settings (for such things as
inverse layers etc).

The OP could try the automatic generation from Eagle and then look with
the gerber viewer from Graphicode.

IIRC, the output of our CAD layout system was reviewed by two engineers
for three-to-five days before we sent them to the PCB manufacturer. I
don't know what's so tricky about the Gerber files, but there seems to
be something tricky about them.

We never look at our Gerber files... we just email them to the board
house. Occasionally the board shop will come back with a question...
apparently they have their own, probably automated, checks. Dead-end
guard traces especially freak them out. They also don't approve of inner
planes that go all the way to the board edge, and sometimes ask our
permission to pull them back a tad.

It's very rare that we have any board problems that weren't obvious on
the schematic.


Yup. I really wonder too. Never had or heard of the tiniest problem about
gerber files in 20 years.


--
Thanks,
Fred.
.

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