Currently NI does not have any tools for importing DXF or DWG files into LabVIEW. I've seen some things about importing them as pictures but if you want to use it for motion you probably would want to extract the point data directly. I don't know of any software that will do that but since DXF is a standard it should be possible. Once you had the point data you could generate a motion profile based on the data points with a contour move.
Regards,
JR A.
Application Engineering
National Instruments