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Creating Gerber files from EaglePCB for sending for manufacture
A short description on creating gerber files from Eagle PCB for the processing of your PCB.
1. Design the PCB, obviously... Run both ERC and DRC with parameters as defined by your manufacturer.
2. Create the drill rack using 'File' -> 'run' -> 'drillcfg.ulp'. Select 'mm' for the dimensions and click OK.
3. Create the Excellon drill data files. Open the 'CAM processor' window and select File/Open/Job and Excellon . Click the 'process job' button to create the drill data.
4. File/Open/Job/ 'gerb274X.cam' job in the 'CAM processor'. Verify that the correct layers are selected for output (go through each of the 5 tabs) ***** The 'mirror' option should be deselected on all layers! **** Click 'process job'.
5. Verify the generated files using a gerber file viewer, viewmate (Start/Programs/Pentalogic). The output formats are
*.drl = drill list, import this first in gc-prevue (file type will be unrecognised, select 'drill rack')
*.drd = drill data, location of the drill holes
*.cmp = component side metal
*.sol = solder side metal
*.stc = mask stop for component side
*.sts = mask stop for solder side
*.plc = silkscreen for component side.