Impossible to create Fit Curves to Mesh Section

[Anonymous]

Hi,

I have a big problem since an uptade of Fusion 360.

Now, "Create Mesh Section Sketch" is in "Create" menu. So, I create a Mesh section sketch without problem.

But, when I create a sketh and want to creat a fitted curve on it, it's impossible to select the mesch section. The only way is to use "Closed spline" option, but then the curves is created far away the original mesh section, and inverted.

Thanks in advance.

[kidd_milan]

I'm getting the same results.  After creating a Mesh Section, I create a sketch in the same plane.  "Fit Curves to Mesh Section" then results in a profile that is mirrored through the origin relative to the Mesh Section.  So it's in completely the wrong place.

Furthermore, as jrpieux61 said, my only option is to use closed shapes.  And in one case, with an ellipse, the result is *completely* off, smaller by more than a factor of 2, even though the Max Curve Deviation is shown as 5.6E-02mm.

Screencast is here:  https://autode.sk/2pAwp7k

Please tell me if I'm doing something wrong or if this is just as buggy as it seems.  Thanks,

-Milan

[Anonymous]

Hi,

I do the same and have same results.

It has work before an update of Fusion360. But now, impossible to use this fonction. And so, impossible to make reverse-engineering. 

What a pity...

I hope a solution will be find soon, in order to stay on Fusion360 and not have to use an another sofware....

[wmhazzard]

@kidd_milan I deleted your base feature because I don't know what you did with no timeline turned on. I created a new mesh section sketch and then tried the fit curves to mesh section and it worked fine, spline, circle and closed spline all worked. 

@Anonymous if you attach a f3d file, someone can look at it to see what you are doing wrong. 

[kidd_milan]

Hi @wmhazzard, sorry for forgetting to turn on the timeline.  I think I meant to exit the base feature before continuing with the sketches.  (I just tried it again doing exactly that and had the same bad result.  I also tried inserting the meshes without creating a base feature at all and had the same bad result). 

Does my screencast help you spot what I was doing wrong?  This isn't the first imported mesh where I've had this problem.  In the screencast you can also see the other issue:  the first Fit Curve I create is an ellipse whose preview looks to be the right size (though mirrored across the origin like all of them), but when I click to create the Fit Curve, the result is a much smaller profile.  This is at 1:19 in the screencast.

Taken together, these seem to be a bad bug, and one, like @Anonymous said, that directly affects reverse engineering.

I can't imagine it's a difference of software versions, since Fusion seems to auto-update very regularly.  Any ideas?

Thanks very much,

Milan

[kidd_milan]

@wmhazzard , you led me to a partial solution!

I realized that I after I created the Mesh Section (which automatically closes the sketch upon creation), I was then creating a new sketch for the Fit Curve.  This was when the mirroring across the origin happened.

You, however, re-opened the Mesh Section's sketch itself, and did the Fit Curve in that sketch.  The mirroring no longer happens, and you can use an open spline and select points along the curve.

BUT, the ellipse fit is still buggy, though not 100% of the time.  See my new screencast, starting at 0:40 and again at 1:03:

https://autode.sk/2PSCeaN

To my mind, it's not obvious or intuitive to do it your way, especially since the sketch closes upon creation of the Mesh Section.  It should still work even in a separate sketch, no?  But thank you for doing it the right way!  

@jprieux61 , this essentially solves the problem, and means you'll have fewer sketches in your timeline.

Thanks!

Milan

[wmhazzard]

Glad you got it figured out. 

[Anonymous]

Thanks all guys !

In fact, first I made a section plane to cut the mesh and then, I used this plane to make the Mesh Section Sketch.

If I do the Mesh Section Sketch without a plane, it works.

@kidd_milan , try to not make a plane before. If not, you will have the spline and circle in mirror, as on your screencast.

I hope I'm clear in my explanations.

[jmpframce]

i am unable to create a mesh section why ?

[jeff_strater]

Not sure what you mean by "unable".  Is the command not in the dropdown for Create?

If so, you may need to turn on Mesh Preview in Preferences:

Or, is the command there, but fails?  If so, you'll need to share your design here and a video of what you are doing.

[jmpframce]

thanks 

i will try  . so how to find preferenes in toolbar ?

How to share my design . I have used  the tool to share design or sketches 

jean michel

[Anonymous]

Hello, I don't manage to get the points anymore ?? I had to cancel something but I don't know what. Would one person have a solution ??

Bonjour, je n'arrice plus à avoir les points ?? J'ai du annuler quelque chose mais je ne sais pas quoi. Une personne aurait une solution ??

Moderator note: English translation added

[jmpframce]

Hello I have the same problem I have loaded an application to plot points from a file that works.
However the importspine application in the addins does not always work.

For the application look for import excel software in fusion to draw a spline.

Bonjour j ai le meme probleme j ai charge une application pour impoter des points depyuis un fichier ecel qui fonctionne
Cependant l application importspine dans les addins ne marche toujurs pas

Pour l application chercher importer ficiel excel dans fusion pour tracer un spline

Moderator note: translated into English