I’m trying to use curviloft loft along path and I’m not sure how to create a wall to print. Ideally, I would like to go from a rectangle to a circle with a 0.100" thick wall so I can 3d print it. The walls collide when I try to go from the inner circle to the inner rectangle, then the outer of both. How do I go about doing this?
RecRound.skp (1.7 MB)
first, model everything 1000x bigger. sketchup hates very small lines and faces, and 0,1" is small.
ok, I’ve opened your file, it’s already that way, good 
second, I would probably use curviloft on either the interior or the exterior then use joint pushpull (also by fredo6) to thicken the shape.
I simply used the thickener one, and made it 100" thick, and SU + solid inspector says it’s a solid.
try it out !
RecRound.skp (2.9 MB)
(and don’t forget to update your profile, that way you don’t need to give your PC infos 
)
The reason your curviloft is going wrong are the extra segments in the bottom straight edge.
Thanks for all the help. I used the JointPushPull and it was leaving me with a funky rectangle face to deal with. So I went making the rectangle a solid line and it turned out better. The only oddity I ran into was the that the wall thickness was not uniform by using the loft along path. It’s not a deal breaker since it’s only going to be used as a vent on the back of a larger version of a K40 laser engraver, but I am curious why it did what it did.
