topic Re: Evaluating Fusion 360 - Stress Test in Fusion Design, Validate & Document Forum

Evaluating Fusion 360 - Stress Test

Anonymous — Fri, 20 Oct 2017 09:02:37 GMT

Hi,

I am currently evaluating a trial of Fusion 360 on an Apple MacBook.

I have an stl file produced by another Autodesk product (TinkerCAD), the stl file is a tri-mesh.

The stl file is a design for an attachment to a crutch to assist those who need crutches for mobility.

In order to stress test the item, I need to assign a material (plastic) and convert to quad-mesh / T-Splines.

I can find no way in Fusion 360 to convert from a tri-mesh to a quad-mesh, I can also find no way in TinkerCAD to output a quad-mesh!

I have believe that both Autodesk 3d Max and Autodesk Recap (previously Memento / Remake) can convert from a tri-mesh to a quad-mesh, but these are only available for Windows 10!

So I appear to be trapped in a loop unable to conduct a stress test, as the product I am evaluating appear to be missing key functionality - I am correct?

I see AutoCAD is available as a free trial for evaluation on a MacBook - can AutoCAD convert a tri-mesh to a quad-mesh?

How do I solve this problem?

Thanks,

Nathan

Re: Evaluating Fusion 360 - Stress Test

daniel_lyall — Fri, 20 Oct 2017 09:17:38 GMT

Have a look at meshmixer https://apps.autodesk.com/FUSION/en/Detail/Index?id=4449224772584128239&appLang=en&os=Win64

Re: Evaluating Fusion 360 - Stress Test

TrippyLighting — Fri, 20 Oct 2017 10:28:36 GMT

Instant meshes can convert triangulated meshes into a quad mesh.

The best remesher I've seen is in ZBrush.

Re: Evaluating Fusion 360 - Stress Test

Anonymous — Fri, 20 Oct 2017 11:27:59 GMT

Thanks for your reply, however I don't think that's a solution unfortunately.

I've installed meshmixer, but that doesn't seem capable of exporting a quad mesh?

In fact it appears to be a common problem, all roads seem to lead back to memento which is no longer available:

http://meshmixerforum.com/index.php?topic=2427.0

Any other suggestions for exporting a quad mesh?

Thanks,

Nathan

Re: Evaluating Fusion 360 - Stress Test

Anonymous — Fri, 20 Oct 2017 12:26:15 GMT

Thanks, Instant Meshes moved me on a stage.

I started with a small obj file exported from TinkerCAD (242KB), the first step was to increase the target vertex count from <1K to >100K, this causes Instant Meshes to subdivide the mesh to a finer resolution. I then reduced the target vertex count to 50K, solved the orientation and position using the default configuration. The exported Quads (4/4) mesh is 25MB.

The 25MB quad mesh imports into Fusion 360 fine, but the convert to T-Spline hangs...

It would seem that autodesk could use the undo/redo history from TinkerCAD to replay the redo history from the start in Fusion360 in order to reconstruct the same model - it's looking like the only way to stress test the item is manually repeat the steps in Fusion 360 were previously carried out in TinkerCAD.

Surely autodesk can better support for users wishing to move on from a TinkerCAD design?

Re: Evaluating Fusion 360 - Stress Test

TrippyLighting — Fri, 20 Oct 2017 13:09:38 GMT

Could you post at least an image of what sort of model we are talking about in this case ?

I would only in extreme cases resort to the workflow you seem to use, particularly for stress testing.

Your workflow by nature introduces changes to the geometry that might be entirely undesirable geometry that might even be unsuitable for stress testing.

Re: Evaluating Fusion 360 - Stress Test

Anonymous — Sat, 21 Oct 2017 15:00:18 GMT

Here you go, this is a meshmixer screenshot of one of the parts, the aim is to optimise the wall thickness for the expected load to minimise the weight of the item itself without risking it's failure during use:

What are the steps to prepare this for a stress test? Fusion 360 seems to be directing me to convert from a tri-mesh to a quad-mesh to T-splines - is that correct?

Thanks,

Nathan

Re: Evaluating Fusion 360 - Stress Test

daniel_lyall — Sat, 21 Oct 2017 20:13:08 GMT

Can you post a pick of the whole part

Re: Evaluating Fusion 360 - Stress Test

Anonymous — Sat, 21 Oct 2017 21:32:47 GMT

I would prefer not to, unless absolutely necessary, why do you ask for picture of the complete design?

What are the steps to prepare this for a stress test? Fusion 360 seems to be directing me to convert from a tri-mesh to a quad-mesh to T-splines - is that correct?

Thanks

Re: Evaluating Fusion 360 - Stress Test

daniel_lyall — Sat, 21 Oct 2017 22:32:24 GMT

The pick looks like something very simple what would be faster to just redraw

Re: Evaluating Fusion 360 - Stress Test

Anonymous — Sat, 21 Oct 2017 22:44:37 GMT

Yes, it would seem so, that's my point about using the undo/redo history to undertake a redraw, both TinkerCAD and Fusion360 are autodesk software, so I see no reason why that couldn't be implemented...

Surely autodesk can better support for users wishing to move on from a TinkerCAD design?