Thank you all for responding.
Now if I use the ramp what is the normal distance that should be used? Yes, It is only for roughing when this happens.
I do use a .25 ballnose depend on the 3d itself sometimes I use a EM .25.
So Adrian your saying on 2d if the material is .75 you would have your ramp on 2.25?? that isn't much?
Thank you again.