I am trying to find the right tool path strategy for the top half of an airfoil. The geometry is basically 1/4 of an ellipse and the tool is a ball end mill (0.25" or 0.125"). When the tool is transitioning from the horizontal to the vertical I cannot keep the tool on the contour to the vertical. I have contact point boundary on. I can see it is related to the tool not going past the bottom of the wing, but the part is much thinner than the stock to allow the bit to overcut but it does not. in the past I think I used steep and shallow but with personal license it is not there any longer.
Any advice is appreciated.