Creating Gerber Files and Excellon Files with EAGLE 3.55

(NOTE: If you have more than 2 signal layers proceed to page 2 (removed))

EAGLE provides a CAM job file, which will create your GERBER files for a 2 layer
board in an easy fashion. Please follow these steps:

Gerber Files

Load your board on the screen.  To do this from the EAGLE Control Panel, click on
File/Open/Board and select the board you will use.

Click on the Icon on the top Tool bar that says ULP. When the dialog box appears
select the ULP file called DRILLCFG.ULP from the ULP directory.   In a matter of
seconds the command line you will notice a message saying ULP has finished.
Now click on the Icon that stands for the CAM Processor. This will load the CAM
Processor Screen. From this screen click on File/Open/Job (when asked to save 
Modified Job reply NO) and select the CAM job called GERBER.CAM from the CAM
directory and click OK.

Now click on the button that says Process Job. This will prompt you with 2 messages.
The first message will be <Delete the $$$ file after process>
 this is a dummy file which EAGLE creates, click OK. The second message is 
<More than one signal layer Active>, Click OK to this message as well.
Depending of the size and complexity of the board, the entire process will take a
few minutes or a few hours.  When the CAM Processor stops all process it means it
has finished. This process created several files that will have the same name as
your board with different extensions:
.WHL Aperture Wheel File
.PLC Silk Screen Component side
.CMP Copper Component side
.STC Solder Stop mask Component side
.SOL Copper Solder side
.STS Solder Stop mask Solder side

EXCELLON FILES
(Make sure you have done step 1 and 2 before proceeding with Excellon files)

Directly from the CAM processor click on File/Open/Job and select the CAM Job called
EXCELLON.CAM from the CAM directory, then click OK.
Now click on the small button that says Process. This will begin the EXCELLON file
generation. Normally this process only takes a few seconds.
The following files are created when the process ends.
.DRL Tool Rack File
.DRD Excellon Output
.DRI Drill Information file