| Gerber File Formats RS-274D
RS-274X. |
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| Gerber plot files traditionally RS-274D format
are a vector plotting/NC machine control language. We preferred leading
zero, 2-3, imperial format. In that format a position of 0.1" would
be written as 100. Without the suppression the same position would be
written as 00100. The language doesn't support the decimal point which
is why it requires the extra 2-3 or 2-4 qualification. The first number
represents the number of integer digits, and the second represents the
number of decimal digits. In 2-4 format without the zero suppression our
0.1" would read 001000. To further confuse things we can also have
trailing zero suppression, in this case our 0.1" would read 001 in
both 2-3 and 2-4 format.
A file plotted to RS-274D format also requires
an aperture table to qualify it where as the RS-274X has the aperture
sizes imbedded in its header section.
For anyone who is interested I have included a
brief summary of the command codes below. A detailed PDF file previously
downloaded from the Barco-Gerber web site,
rs274xc.pdf
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| Basic Photo Plotter
Commands:- |
| D01 --Turn light on to draw, Used
for drawing lines.
D02--Turn Light off,
D03--Flash, Used for drawing pads,
D10--Onwards, Select aperture.
To flash a pad at 0.5*1.0" the command
would be X00500Y01000D03*
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| If
in doubt about the formats:- |
| Don't even look at any of the output settings on
your CAD package, just create the plot files and send them over to us.
The chances are we can easily determine the format simply by looking at
your file. If you are worried we are always happy to fax a preview of
the photo plots through before we commence production of the boards.
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| Gerber Viewer Links |
| Cam350 |
Camtastic |
| GC-Prevue |
Viewmate |
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CAD Notes |
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