Offset adjustment

Some CAD systems do not generate drill files with the same coordinate origin as the Gerber files. If this is the case, then the drill hole coordinates must be offset so that they align with their corresponding pads in the Gerber files.

To move the drill files so that they match the Gerber files:

1. If necessary, use the Rotate or Mirror buttons so that the drill pattern matches the copper. The Rotate button rotates around the file origin. The Mirror button mirrors along the X=Y diagonal. You may need to zoom out to see the entire image.
2. Click on the Align drill with pattern button (leftmost button above the graphic display) so that it is depressed.
3. Using the left mouse button, click and draw a selection rectangle around a drill hole, and then release the mouse button. A “rubber-band” line should appear between the selected drill hole and the mouse pointer. 
4. Using the left mouse button, click and draw a selection rectangle around the corresponding pad for the selected drill hole, and then release the mouse button. The drill image should snap to the Gerber image, and the Align drill with pattern button be released.

Drill file offset applies to all drill files. If necessary, adjust the setup of your CAD system so that all drill files are generated with the same coordinate origin.