STL to Machining is painful

[MarioFrechette]

Well, I have a project that is becoming painful to complete.

This stl is to become a mask with a wall thickness of 5mm but I must scale the stl to have a 6cm from center to center of the eye.

But before that, I need to import a model. The import obj seems to stopped working when trying to import the attached file. I did leave it run for several minutes and nothing telling me it is doing something or it has crashed!

At the end I need to machine this and not loose quality like we loose when we convert mesh to t-spline and then t-spline to brep.

Help would be appreciated. I seem to be up a Fusion wall!!!

Thanks.

Mario

[Ketherton21]

you've met with a terrible fate, haven't you?

there are a few walkthroughs i have seen to get rid of those splines. lemme try on my machine to get a decent step file.

nope. youre probably further ahead to just search for a stp file to begin with. every time i deal with mesh its a disaster. if it has any sorty of contours or detail it goes out the window. i see a stp on grabcad. ill jump on the wagon with you though and see if theres another option. the result i got after reducing the facets was better than after i converted to brep

[MarioFrechette]

Not really! Health is good and this is only a job!😁

[ChristopherMarion]

Hi @MarioFrechette 

I was able to import both files into a new project.  Here is the file.....https://a360.co/3dyssVe

Not sure if this helps or not, but I uploaded both files into a folder (the STL file did take about 5 minutes), then I created a new project and inserted both of those files into the design.

If I am missing something, let me know and I'll take a peek for ya!

Thanks,

[MarioFrechette]

Hello Christopher,

I did finally use another software to cut this part. I was losing way too much detail bringing down the mesh count and I did also try re-creating surfaces and since this shape is not an engineered shape it was requesting many surfaces and it was also generating its own issues.

I did learn my lesson! simple engineered shapes in stl can be treated in fusion360 but forget the free form high mesh parts.  The mesh count limitation is the issue, in this case, the convert works well but the mesh count is the restriction.

Well, I did spend a lot of time on this one for not much return.

Thanks!

Have a nice day!

[johnswetz1982]

You really should not be having that much trouble, You can work directly from the mesh without having to do anything to it.

[MarioFrechette]

I see your examples and I don't understand! did you have to do a convert from mesh to b-rep?

See in attachment the last stl file I did use and it was still to large for the convert!

Other question! Do I need to convert it to machine it? It was my understanding then I needed to do this!

[johnswetz1982]

No those are work directly with the mesh, no conversion. Mesh does not play well with 2D operations and the 5 axis that are looking for feature/control lines but the 3D operations / rotary are fairly straight forward working with direct STL. 

I am not sure what you mean by "Convert it to machine it"