Hello all; my first post on the forum, but I do check in from time to time to search for help with other questions.
I'm having an issue modeling a certain part, and I hope that someone might be able to help me with it. I'm trying to loft between two existing surfaces. I know the dimensions/profile of the beginning sketch and another sketch that is at a pre-determined distance away. I can easily loft between the two, but how do I extend the loft to the "finish" plane while following the same contour/direction/etc.? I don't know the dimensions or location of the finish plane sketch; only that the loft should extend along its current path to the finish plane.
I've attached a similar model to illustrate what I'm trying to do. I know the start and middle, but need the model to extend to an existing surface at the "finish" plane.
O.k., it appears that the small straight line between the arcs in your loft profiles are causing the problem, and this makes sense if you think about it. The small flat on Sketch22 is about .005" long, the small flat on Sketch20 is about .001" long, when we are extending the surface we are further reducing the length of this small line, eventually to the point where it becomes non-existent and the corresponding arc geometry self-intersects (at least this is what it looks like from my perspective). What I did in the attached model was to create a fit spline between the two arc sections and the small straight line in each sketch profile, this may or may not be acceptable to you however, it does eliminate any self intersections created from using the extend surface command. This is just a guess on my part, maybe someone else will chime in if I'm wrong on my thinking.