how to ise spet blend with sketched section?

hello guys i'm trying to build this part which has a variable protrusion so i'm trying to get than through swept blend with sketched entity
now when i select the orgin ro curve which is supposed guide my sketch
and it is lying on a base feature but it is not normal to base feature which is creating a gap
for better i'm attached three picture
1) drawing of the sketch
2) ok part from the book
3) my problem
please go through you will understand

2 Answers

I have two suggestions to eliminate the gap:

1. Extend the guide curve so it goes about half way into the base feature
or
2. Modify the guide curve so that it is exactly perpendicular (normal) to the top face of the base feature

What about a simple extrusion, then cut with a swept surface?