After spending to much time figuring out what the files need to be to work with
the PCB builder I will share what I figured out as the FAQ is not that clear.
It looks like the PCB Builder is based mostly on files generated from Orcad or Altium,
although most any board program should work with the right file names and
file formatting. I use PADS and that is very flexible on generating board files.
I used the Orcad file naming system and generated these files for a 2 layer board:
board.top top copper layer
board.bot bottom copper layer
board.smt top solder mask
board.smb bottom solder mask
board.sst top silkscreen
board.outline board outline only
board.drl NC drill file
All files except the drill file were in RS-274X Gerber format.
The drill file was in Excellon format with 2-4 format
(2 leading and 4 trailing digits) and no zero suppression.
Also on the drill file I needed to remove the size and feed rate
from being part of the “tool section start” command (just T@t).
Also make sure all the files have the same offset, I used
1000mil x 1000mil for the offset of all the files.
Hope this can help some people.