topic Re: From surface to solid in Fusion Support Forum

From surface to solid

corradofiorentini — Sun, 03 Dec 2023 14:50:06 GMT

Good afternoon. First of all, I apologize for my English and I hope I am in the right section to ask my question.
As per the title of this post I can't find a way to transform this surface into a body with a thickness of 2mm.
I attach the file.
I really hope someone can help me.
Thank you in advance

Re: From surface to solid

jeff_strater — Sun, 03 Dec 2023 18:33:55 GMT

The problem is the geometry created by Loft2:

In this version, I created a 3D sketch and added a couple of rail curves. I just left them linear, but you can play with the spline handles to get different results.

This produces somewhat nicer geometry:

next, 2mm is REALLY thick for this model. That depression is not much more than 2mm itself. I was able to thicken to 2mm, but I'm not sure this is the result you want. Anyway, you have the info you need, now to work on it on your own. Use curvature analysis. Areas of high curvature will always make Thicken fail.

my model is attached

Re: From surface to solid

corradofiorentini — Sun, 03 Dec 2023 19:53:17 GMT

Hi Jeff!
Thank you so much for the quick reply!!!
Unfortunately this evening I won't be able to try your advice straight away... I can't wait for the sun to rise!

Re: From surface to solid

jhackney1972 — Sun, 03 Dec 2023 20:24:50 GMT

It is always nice to direct your Forum replies to the person you are responding to instead of yourself. When responding to a post from someone, do not use the "Post Reply" icon as this will address your post to yourself. Instead use the "Reply" icon on the post you are responding to address your post to that person. Look back at the messages in this post and you will see what I mean.

Re: From surface to solid

g-andresen — Sun, 03 Dec 2023 22:34:24 GMT

hi,

try this

But you have to make sure that the curves of your sketches are harmonious.

(view in My Videos)

günther

Re: From surface to solid

TrippyLighting — Mon, 04 Dec 2023 19:14:00 GMT

@g-andresen you are correct that the OP should be making sure his curves are "harmonious".

I observe that your curves aren't harmonious either.

The code in Fusion 360 (or the geometric modeling kernel, not really sure which) that creates the intersection curve is inadequate to create smooth curves suitable for creating further geometry. I've provided samples of that to the Fusion 360 team for many, many years!

The same applies to the offset spline the OP created.

In fact, Fusion 360 has significant problems to create good lofts, even with better input.
Instead of offsetting the spline I would offset the surface and then use that for splitting faces or trimming.

Edit:
Attached is my version, mostly without curvature issues.

Re: From surface to solid

corradofiorentini — Mon, 04 Dec 2023 20:07:40 GMT

A thousand thanks