i want to digitize an object that is x=3in., y=2in and z=.25

In setting up wizard
x=3.0,y=2.0,z travel height  .35 , z depth =0.0
x and y stepover.04  (approx 50% )
My probe has a 1/16 tip and I will carve using a 1/16 bullnose
Is this the correct way to setup?
When i go to carve should x,y,z all be 0