Usually gerber files are generated "as if viewed from the component side"
or pretending the PCB material is clear and you can see straight through
it.  So your solder side would not come out a mirror image of what you see
on the Eagle layout screen.

Make sure that each of your board's gerber files contains a board outline
(dimension layer) and that you add a mechanical plot (all dimension
layers, holes) and that you also provide physical dimensions of your board
on the meachnaical plot  (download auto-dim from the eagle site, or a
similar ULP that automatically dimensions a board)  The board house will
figure out whether they need to mirror the solder side.  The dimension
layer helps them keep it all lined up.

You won't need the mirrored feature unless you are photoplotting this
board yourself.


I am not sure, but I thought the tool list was automatically included in
RS274x..?


-- Lawrence Lile





Donovan Parks <dparks@UVIC.CA>
Sent by: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
03/13/2003 02:50 PM
Please respond to pic microcontroller discussion list


        To:     PICLIST@MITVMA.MIT.EDU
        cc:
        Subject:        [EE]: CAM Processing in EAGLE (Mirror Solder Side?)


Hello,

I have finished laying out and routing my motor controller PCB (thanks for
all those that helped) and am now proceeding to generate the required
Gerber and drill files.  However, I have quickly ran into a problem. EAGLE
CAD has a predefined job for doing RS274x.  This job indicates that the
solder side should be mirrored.  However, when I do this and then preview
the resulting Gerber files in GC-Prevue the solder side is incorrect (i.e.
it shouldn't have been mirrored).

My problem is that I am uncertain if I am using EAGLE CAD incorrectly (and
should not be mirroring the solder side) or am using GC-Prevue incorrectly
(and somehow need to specify that this signal layer is on the bottom of
the PCB).

It seems it should all just be a matter of convention, but being new to
this I am not sure what is most common.

Thanks for any help.

Regards,
Donovan

PS: How do you load a tool list file in GC-Prevue?  I know how to add the
drill file, but can find no way to automatically load the tool list.  I am
currently manually entering the tool list.

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