> Hello
>
> RS stands for Recommende Standard. RS274 is the accepted Gerber Format for
> Photoplotting.
>
> It has been a defacto Industry standard for Phoplotting. The problem with
> the RS274 is that the phototool defition in terms of aperture width are to
> be defined separately in a file called aperture list. It is a pain and
> adds up to the probablity of error.
>
> An Extended version of it is called RS274X, where-in the external aperture
> list is embedded into the Gerber File itself. So u just the gerber file to
> any plotter (supportting RS274X format ofcourse), there is no need to
> define the apertures externally. The plotter conversion software
> understands the apertures defined in the gerber file and plots
appropriately.
Here is a sample gerber file in RS274X format
G04 ================== begin FILE IDENTIFICATION RECORD ==================*
G04 Layout Name: raj.brd*
G04 Film Name: SF*
G04 File Format: Gerber RS274X*
G04 File Origin: 11.0-p007*
G04 Origin Date: Tue Apr 8 11:52:15 1997*
G04 ================== end FILE IDENTIFICATION RECORD ====================*
%FSLAX25Y25*MOIN*%
%IR0*IPPOS*OFA0.00000B0.00000*MIA0B0*SFA1.00000B1.00000*%
%ADD13O,.015X.05*%
%ADD14R,.015X.05*%
%ADD11R,.04X.065*%
%AMMACRO15*
4,1,4,-.0125,.0325,
.0125,.0325,
.0125,-.0325,
-.0125,-.0325,
-.0125,.0325,90.*%
%ADD15MACRO15*%
%ADD12R,.075X.025*%
%ADD10R,.025X.075*%
%ADD16C,.007*%
%LPD*%
G54D16*
G75*
G01X92700Y477250D02*
X94200D01*
Y475900D01*
X93750Y475450D01*
X93220Y475150D01*
X92480Y475000D01*
X91730Y475150D01*
X91200Y475450D01*
X90750Y475900D01*
X90450Y476420D01*
X90300Y477020D01*
for more format inforamtion please visit www.gerbersystemscorp.com, where
in you can mail order them a Gerber Foramt book
thanks with regards
k.v.raj
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>
>
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