Search:

Silver, on my table I have the strips at 2 inches. My water table is 5 inches deep. I keep water level to the top of the slats. I cut some 1.25" plate @ 120 amps and it still never cut more than 1"...

I use 2013 Inventor, I don't know if it is the same in 2012.
If you want to cut DXF of any face in Inventor, just right click the face and select export as DXF. You must be selecting faces and edges...