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Date: | Fri, 30 Jan 2009 08:50:59 -0600 |
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Ioan,
I use GerbTool as my gerber editor. It has a feature that allows me to group the line draws and convert them into flashes. Once it is a flash then you can measure to the edge or center with no problem.
You may want to look at your tools. If you are using a free gerber viewer you will probably be out of luck.
Russell Nowland
Alcatel-Lucent
Advanced Manufacturing Engineer
Address: 14000 Quail Spring Parkway, Suite 300
Oklahoma City, OK 73134
email: [log in to unmask]
Desk: 405-302-1660
Cell: 405-203-0034
Fax: 405-302-1622
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
Sent: Thursday, January 29, 2009 9:42 PM
To: [log in to unmask]
Subject: [TN] Aperture generation in gerber files
Dear Colleagues,
The many gerber files I have seen can be divided into two categories, according to how the geometrical figures (apertures) of the land patterns are generated:
o Apertures declared as stand alone geometrical figures (e.g. a rectangular 100x200 pad is declared as a 100x200 rectangle)
o Apertures generated by successive positions of a smaller element (e.g. 100x200 rectangle generated by adjoining twenty 100x10 lines)
The second version does not come handy at all when trying to measure the center of an aperture with a gerber viewer.
Questions:
o How is each of them generated?
o Are there CAD systems that can only generate the latter?
o Any precautions that can be taken by the designer so that only the first one be generated?
o If I want to call each method by its technical name, what would that be?
Thank you,
Ioan Tempea, ing.
Ingénieur Principal Fabrication / Sr. Manufacturing Engineer
30 ans déjà! - Already 30 years!
950 rue Bergar, Laval, Québec, H7L 5A1
t : 450-967-7100 ext : 244
Mtl : 514-990-5762
f : 450-967-7444
[log in to unmask]
www.digico.cc <http://www.digico.cc/>
P N'imprimer que si nécessaire - Print only if you must
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