【转帖】help sweep with expanding od circles

yang686526

help sweep with expanding od circles
for the life of me i can't get this to work.  what i am trying to do is draw a 3" od pipe (.065" wall") elbow that gets swedge up to 3.25" od after the bend.  i don't want use a loft as it cannot be dimmensioned correctly enough for the pipe bender.
the problem comes into to play when trying to use a sweep i cannot seem to get it right, as it just produces errors when selecting the guide curves or sweeps to the first point on the guide curve.
i've done some testing using an eclispe and it works fine.  the problem only exists when using a circle.
any help is appreciated.

add split points, to the circular profile, where the guide curves connect.
btw, the outer arc and line are not tangential.

wouldn't the swage look more like the attached?

you don't need to split the circle.  add a point coincident to the circle, and constrain the point to a guide curve usinge pierce to circle's control radius.
thetick,
that was the first thing i tried, but it would not work for me. using tha89sx's file, does it work for you?

also constrain the senter of the circe to main guide with pierce.  it has worked for me in the past.   
tick ... are you able to get it to work using tha89sx's upload? i don't re  
thanks everyone, by splitting the circle it worked out.