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I've made a double layer pcb and I now have to get the gerber files so they can be send away.
The things i've seen about gerber files are a bit confusing to me.
Can some one give me some clear instructions about creating the different layers like TOP, BOTTOM, SILK_TOP ect.
I can't see YouTube movies because it is blocked here in my company.
Have a look at <your_install_dir\doc\algroman\algroman.pdf but the basics are set the display to look like what you need for your artwork (turn layers on/off to suit) the go to Manufacture Artwork - Film Parameters, select one of the artwork names and use RMB (right mouse button) Add and specify a name, the artwork name produced will match the display.
In reply to steve:
In reply to PHMISTRY:
The .art file can be read into any Gerber viewer (It is Gerber Data). Look at Manufacture - Artwork - General Parameters tab for the gerber types you can use. Most gerber viewers will read this. Take a look at GC-Prevue or CAM350 or Viewmate.
If you want to change the file extension type look at Setup - User Preferences - File_management - Versioning and change the ext_artwork from art to gtd
In reply to Mistry:
You dont really need to generate Negitave artwork for you gerbers. Most board-houses make composities of your gerbers anyway so they can plot the gerbers on film.
Suggest you put out your artwork layers as positive layers using RS274X Format.
Was there a particular reason you wanted to create negative film ?