On Apr 13, 2007, at 10:01 AM, Vasile Surducan wrote:

>> For a 2-layer board, I see 3 drill files created when I generate the 
>> gerber (274X) files -- .dri, .drd, .drl.  This is what I see in 
>> there...
>
> There is an ulp (available only in some newer versions of Eagle) you 
> must run.
> It's been a while I've used Eagle so I forgot the name but I think is
> drill-legend.ulp
> This one will assign a predefined symbol to every via or hole you may
> have (and for about 2000 vias will take a few minutes).
> Also will draw a table containing the legend.

Yeah, but this produces a human-readable file, rather than a cad file,
IIRC.  I think this (plated vs non-plated) is something that varies from
one board shop to another, and if you want consistent results, you'll
need to ask the shop you're dealing with how THEY want things to be.
The separate drill files I mentioned has the advantage of being easy
to manipulate, but will require modification of the EAGLE CAM job.

(Does it seem to anyone else that there's an awful lot of the PCB
fabrication stuff that is not nearly as automated as it ought to
be?  There are all (way too many!) these standard file formats for
various things, and then you get advice like "each layer should contain
some text so that we can check layer orientation", and the filenames
are close to random...)

BillW
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