Loft Command Problem
@oldtbone55 , the PNG file is fine, it is the .f3d file that is empty. Can you try sharing that one again? Thanks.
Jeff Strater
Engineering Director
@oldtbone55 , thanks for the design. The problem seems to be with the sketch curves for these profiles. How did you create them? I was able to fix one by adding missing coincident constraints between some of the curves in each profile. However, that did not work for the 4th one - those constraints can not be added. It looks like for some of the ones that succeeded, the curves are single circles, but for the ones that fail, they are composed of two or three curves, which are not properly connected.
I would recommend re-creating those sets of curves, using connected curves, and if possible, single circles as in the ones that succeeded. In the screencast below, I show just copy/pasting one of the sets that work. I suspect that you had other reasons for making these all be individual sets of profiles, but you might be better off just re-using the ones that work, or re-creating these.
Jeff Strater
Engineering Director
I don't think that Fusion imports sketch curves from Solidworks, so I think those curves were created in Fusion. So, you should be able to do this in Fusion, not Solidworks.
You can use Project Sketch to Surface to get the curves to map to the surface, though you should only need to do that for the top-most curve, right? You can also over-build the surfaces, so they extend beyond the body.
the reason why my screencast has "Design" is that I have the "UI preview" turned on (you can do this from the Preferences dialog). It's just a different organization of the same set of tools that used to be in the Model, Patch, Sculpt, and other workspaces.
Jeff Strater
Engineering Director
sorry for the delay, there was sleep and day job in between...
Basically, what I think you've found is a bug in Fusion. I'll log that and get it looked at. I tried a bunch of stuff, and finally, what I would to is to just model one of these cutouts, and then copy/paste it into position for each know cutout. I don't know if that will be satisfactory, but you can always tweak the results to get what you are looking for, I think.
[edit] the loft/project curve to surface bug has been logged as FUS-46710
Jeff Strater
Engineering Director
I've looked at the model and find that it exhibits quite an unorganized hack/slash technique. Components are being moved when not necessary. Sketches are not in the components that belong into and are not properly constrained and dimensioned etc.
Projecting sketches onto surfaces is for the most part is not a good technique. The surface can be directly split with split face and the unneeded faces can be deleted. In general these edges, instead of sketches should be used for lofting. Splitting a compound curved face with projected sketch items is a not a recommended practice because it usually totally kills the curvature on the resulting edge. One might argue that one does not care about that curvature, but one will be puzzled in many cases why the the filleting in the next step fails 😉
There also is not really a need for the intermediate rings below the top surface that serve as additional loft profiles.
Despite the presence of a bug this can easily be accomplished with a number of techniques in Fusion 360, even with "just" solid modeling.
@oldtbone55 wrote:
please provide some positive help if you're going to post back these kinds of replies.
Will do so later. I did not have time to do a screencast from work 😉
So this first screencast is more a question than an answer. I need to understand what it actually is you are trying to achieve before making recommendations for better methods.
I do explain, however what I mean with sketches projected on compound surfaces creating problems.
When working with surfaces is is almost always better to work with edges than with projected sketch geometry.
