my surface stops being a surface

[iepst71]

Hallo people, I have been learning fusion 360 for a little bit now and i am trying to make multirailed lofts but my sketches sometimes stop being a surface to refrence. i only happens when i move them around. like i draw them and moven them up and down but as soon as i start rotating it in any wich way the closed sketch stopes being a closed sketch wich results in it not being eligible as a plan/ surface for the loft tool. but on closer in spection the sketch us still closed but it just doesnt function as a surface thing any more. BTW i cant find the answer for my problem probably because i am unable to properly describe what is going wrong. so i am hoping someone wil get it on this forum.

[g-andresen]

Hi,

1. please give some more information > Screenshots or Screencast.

2. Please share the file.

File > export > save as f3d on local drive  > attach it to the next post.

günther

[jeff_strater]

"i draw them and moven them up and down but as soon as i start rotating it in any wich way the closed sketch stopes being a closed sketch wich results in it not being eligible as a plan/ surface for the loft tool. but on closer in spection the sketch us still closed but it just doesnt function as a surface thing any more."

I think what you mean here is "profile", not "surface".  A closed, 2D region in a sketch is called a profile.  What is likely happening is that you are rotating elements of your profile out of the sketch plane, making that profile no longer planar.  Fusion only recognized planar regions as profiles.  You can do a surface loft (the word "surface" here meaning:  a sheet body with no thickness) from a set of 3D sketch curves, but you cannot do a solid loft from 3D sketch curves.

But, as @g-andresen says, if you share your design, and some images about what you expect, the answer will likely be obvious.