Having problem with Mach 3 showing my drawings massive when the are the correct size on SheetCam.  Have one that is 12" x 12" but when Gcode is loaded into Mach3 it shows it as 355" x 355".  Found in SheetCam where I needed to swap from metric to inch, did that but still the same problem.  Also can seem to speed up x' & z.  Goes very slow.
Or is there any place I can read or see a diagram on how to change this.
Thanks for any Help!!!