I cannot figure out how my drawings are being scaled down before milling. In autodesk/autocad mech. the units are set correctly and they match up in cambam /mach3 as well. But upon cutting on my machine everything is being scaled down by a factor of ~11/32. In other words a drawing that is 8 inches wide in cad/cam comes out 2.75 inches after cutting. I jog the g-code drawing and the machine coord's/units are correct as well in mach3...I see "scale" next to mach3's machine coord's, should this be edited?

Is it because my power settings are set at 1/2 step, 75% current settings? I'm checking units/ and measuring, but am drawing a blank. Hopefully it's something small I've overlooked. Advice? Thanks