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Invalid Imported Drill File

When I import the 29891-RNC.drl file, the Fab3000 software correctly imports the .pho files, but incorrectly imports the drill file with an incorrect scaling factor.  Im including all of the project files so that you can see the issue.  


Please remember Drill files are just XY coordinates without any formatting.  Here's what your sample drill file looks like,

Note: There's nothing in the drill file header which states the drill format (i.e where the decimal place should occur, nor what units to use either: inch or millimeter, or even the tool sizes).  These are things that FAB 3000 (and every other CAM tool must guess - unless that information is included in the drill header).  Here's a few links about drill from the support forum which should help,

The drill file coordinates do not align with the Gerber.  Many PCB CAD tools output their drill files with different coordinates that the Gerber, so you need to perform align layers.

Here's a tutorial movie showing me correctly import your sample drill files and then have to perform Align Layers to move the drill up to the Gerbers,

Note:  If you generated those Gerber and Drill files, I would recommend going to your PCB CAD tool and see if there are different options used during Gerber or Drill Export - to ensure both coordinates are the same - to prevent any additional steps (as above).

Thanks again.

Best regards,


Simon Garrison - Applications Manager

Visit Numerical Innovations


Thank you Simon!  Very good explanation for explaining the issue.  If you have any books you would recommend for me on this, I would be very appreciative.
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