Thicken Error. I tried it in Inventor, there it is OK. I tried the Fusion jumped error. I think it's a Bug. What do you think? Please see the video and files. All attached. Is there any solution?
Thicken Error
I am assuming you built this surface in Fusion 360, then took it to Inventor. If you take the Inventor model and export it to Fusion360 via SAT file, it works up to a 2.5mm thickness. I would imagine that there is some little issue in the Fusion 360 file that a trip through a more refined model application and back fixed the issue. Of course if you do not have a copy of Inventor to do this process, it does not help you a bit. Your model, created from this SAT file is attached but I am guessing you do not need it, you just wanted to make a point.
John Hackney, Retired
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I am not surprised that this creates problems. The curve you are seeping along is a result of a trimming operation.
If you look at the curvature comb along that edge, you can see that tangency is not maintained, and then sweeping along that edge likely creates near tangency conditions, which then prevent this from thickening.
If you use continuous splines instead of lines and arc you'll likely have more luck with this.
