CS2 DXF export in Inches??

EXPORT DWG or DXF from Illustrator:

Note: Illustrator will allow for open paths to have shape fills. For instance if you draw two sides of a triangle in illustrator, it will make a fill even though there is no third side. If you want closed paths, ensure they are closed before exporting.

1. Select FILE, EXPORT, DXF or DWG.

2. This is the easiest way. Set the Artwork Scale to 1 point = 1 unit. It is important that you select points for this step. Illustrator uses points as the 1:1 scale basis.

3. Now set the  Artwork Scale from "points" to whatever unit is actually in use. Illustrator will do the math and change the scale.

For instance, if you are using inches then FIRST set the Artwork Scale to 1 point = 1 unit, then NEXT select inches, and it will show 0.0139 inches = 1 unit.

1 unit = 1 points
1 unit = 0.0833 picas
1 unit = 0.0139 inches
1 unit = 0.3528 mm
1 unit = 0.0353 cm
1 unit = 1 pixels

Now when the DWG or DXF opens in Illustrator again, or a CAD program, the scale is the same. If prompted you can use the ratio above. I advise sending the ratio with the file. (e.g. 1 unit = 0.0139 inches)