Self-intersecting body with loft and path

simonb

Hello,

I'm trying to use the path feature with loft tool, but it results on a "self-intersecting body" that cannot be resolved. Unselecting the path feature would make the tool work, but I would like the shape to follow a curve.

Without path:




With path:



Do you have any idea to make this feature path work?
Here is the link for the document:
https://cad.onshape.com/documents/820714fe10c740379bcc9a5d/w/4d94049738ef4923a0e61fc8/e/628b3bc013287cf979eade50

Thank you

simonb

I finally manage to make it work by adding vertices (match vertcies).

Thanks again

mahir

Well, your path doesn't touch your profiles. How is OS supposed to know what to do? The profiles are telling the loft command to be in one place, while the path says to do something else entirely. I'm surprised you even got a preview out of it. It's up to you whether you edit the path or profiles, but you need to end up with a path that pierces all your profile sketches.

simonb

Understood, I didn't know it worked like that.
thank you

simonb

I made a new path (3D fit spline), made of one vertice of each sketch/profile, and the result is still the same:




Any idea?

simonb

I finally manage to make it work by adding vertices (match vertcies).

Thanks again

mahir

Glad it worked it worked out! Yeah, unless your profiles are very simple, you'll have to tell OS how to "connect the dots", so to speak.

simonb

Thanks Mahir, however you may want to know that the first curve that wasn't touching any profile's vertice works as well if I add matching vertices. 
So I conclude the path must not touch the profiles.

mahir

Surprising, but good to know. Thanks. I guess I expected loft paths to behave similarly to sweep paths.