If you're talking about the tradition version and you haven't purchased the 3axis option, you can possible get creative with taper angle in 2axis contour to achieve your slope.
i am trying to do the same thing. running surfcam 2015
machining a plate with an angle on each side meeting at center like an axe blade.
made drawing using top view only with some cut control z depths for the flat surfaces.
any help properly drawing so i can produce the right tool paths for programming code
my cell 343 363 0593 goaler61 call /text canada