Can't select sketch to loft

[rudi4]

Hi 

My name is Lukas. 

I am trying to design tire to my model and I got stuck.  I need to loft three surfaces (not flat). That what I did.

Three surface revolvers from sketch (arc to revolve), sketch intersected through each, and when I am trying to loft it- cant select any. Blue sketch is enable to select, but not intersected faces. 

I'll be graceful for any tip

Lukas

[Rohan.bongale]

Hello,

Thankyou fo sharing your concerns. Is it possible to share the design or video of the steps you are trying.
So that I can share the solution with you .

Thank you,
Best RegardsRohan Bongale | Senior QA Engineer  | Autodesk India Pvt Ltd.
P. 20 6680 4444 | rohan.bongale@autodesk.com

[Rohan.bongale]

We cannot select combination of sketch and bodies to create loft

[rudi4]

Thank You for reply

This is not between body and sketch, just three intersected revolves (hope is understandable what I write).

Can make a Video but first I have to find out how...! I've never done it before hehe

But share design- how to do that?

[rudi4]

I hope I got it.

I forgot to write then I've tried also project to surface but it is not active to select too.

There's link

https://autode.sk/3gXhCuL

[TheCADWhisperer]

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

[jeff_strater]

actually, you can create a solid loft between surface bodies and a sketch profile.  So, there must be something unique about your design that is preventing that selection.  As @TheCADWhisperer says, we'd need access to your design to see for sure what is going on.

[rudi4]

Thanks for all answers.

I made a similar design and I noticed, then if revolve is from straight line- loft function works. But if loft is from arc loft doesn't work.

Is that how it supposed to be?

I attached small fusion file

[jeff_strater]

that seems like a bug to me.  I'll look into it.

[TrippyLighting]

Just to be clear, you can get the same solid geometry with a surface loft and stitching.

[rudi4]

Yes that's working, it's truth.

I'll do it that way, if there won't be any solution, but I cant understand why it was working before.

Around two years ago, that way (revolve-intersect-loft) was working fine with previous model. 

[TrippyLighting]

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@rudi4 wrote:

... but I cant understand why it was working before.

Around two years ago, that way (revolve-intersect-loft) was working fine with previous model. 

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Although it might sound counterintuitive given that a bug might have been discovered, there have been a number of nice improvements in the loft tool over the last 2 years ad development on the tool continues to progress.  

[jeff_strater · Accepted solution]

I spent a fair amount of time (probably more than I should, but once I got started, curiosity took over) today chasing this bug down.  I found the bug - we are specifically disallowing selections of spherical or toroidal faces in Loft.  I think I found when this change went in, and (while it is possible that I am misreading the history here) it looks like this was done about 7 years ago.  There could easily be other things going on, but that is my current understanding.  Anyway, this is a bug, and we will get a fix for it.  The Fusion bug is FUS-89984.  Thanks for reporting it!

[rudi4]

Thank You very much, Jeff 😀👍

I've spend many evening to figure it out, what I did wrong.  It's big relief to know the reason 😅  Thank You again.

I attached a test file. It is a part of design I mentioned earlier. It is, like as said around two years old. I used function face offset, but it is from spherical revolve too- it went fine then. 

Could You be so kind and take a look on it?

About bug- can I make any upgrade to fix  that bug? If yes- how? I don't see any upgrade option 🙄

[jeff_strater]

I've looked at this design.  The input surfaces for both lofts are actually cylindrical, not spherical.  I haven't looked into the details yet, but my debug tools show cylinders

[rudi4]

Jeff, You are right in 100%.

Now I noticed the differences now. In test2 file all is from cylindrical revolve. I used spherical surface, just to cut the body after loft, to obtain final shape. 

My bad. 

Solved, clear and understandable for me. 👍

Thank You