topic Re: Unable to Split Model in Fusion Design, Validate & Document Forum

Unable to Split Model

dsimms4 — Wed, 28 May 2025 09:47:39 GMT

Hi Guys,

To start, this is a model I downloaded as an -asm.stl file.

I converted it to a mesh then started going around deleting as many of the un-needed faces.

My issue is with the lid.

What I intend to do is split/separate the lid from the main chest body to enable me to move the lid, so I can have model with the lid open or closed. I also plan on adding a piano hinge.

The problem I'm facing is when trying to split the lid from the chest using a plane located on the back face of the chest, I get a compute failed error.

I've also tried adding an extruded rectangle along the 'join' between the chest and the lid in an effort to join all 3 then do the split and remove the extruded rectangle, but this won't even join the 2 parts with a vertices error.

Can anyone offer a solution to enable me to split the lid from the main chest?

I'd be very grateful for your advice.

Darren.

Re: Unable to Split Model

TrippyLighting — Wed, 28 May 2025 13:34:35 GMT

What is your overall goal with this model?

I am questioning whether Fusion is the right software to work on this triangulated mesh model.

Re: Unable to Split Model

dsimms4 — Wed, 28 May 2025 13:58:13 GMT

Hi TrippyLighting,

To scale it down to roughly 1:43 and 3d resin print.

I've deliberately left the drawers as individual items as I plan on printing some with the drawers open.

If you think it's triangulated now you should have seen it before, it was crazy.

what software are you thinking of?

Re: Unable to Split Model

TrippyLighting — Wed, 28 May 2025 14:14:33 GMT

I would use mesh editing software, for example, Autodesk Meshmixer or, depending on the task, Blender.

Triangulated meshes do not represent native CAD data and are the least common denominator to represent 3D geometry.

In many cases, it makes no sense to convert a triangulated mesh model into BRep and then re-export it as a triangulated mesh for 3D printing.

Re: Unable to Split Model

TheCADWhisperer — Wed, 28 May 2025 14:28:05 GMT

@dsimms4 wrote:
To scale it down to roughly 1:43 and 3d resin print.

@dsimms4

Logic: And when you scale it down - how thick will your currently thinnest features be after the scaling?

Re: Unable to Split Model

dsimms4 — Wed, 28 May 2025 15:33:16 GMT

Hi Guys,

Thank you for your replies.

Yeah once scaled down, what is part of the chest ie drawers that are shut will all be filled in, and any parts protruding will need to be thickened.

Thank you for your input

Re: Unable to Split Model

dsimms4 — Thu, 29 May 2025 14:08:13 GMT

Hi Guys,

Lid now closed after tinkering in blender.

Not done anything with this yet, just wanted to report back.

Also to Thank You again.

Re: Unable to Split Model

TheCADWhisperer — Thu, 29 May 2025 19:54:36 GMT

@dsimms4

If this were my design, I would start over and model at actual size that you are going to print.

In my experience having had students print thousands of designs over a 22-year period - I suspect that you are not going to be happy with the results using the techniques that you have used so far.

Re: Unable to Split Model

TrippyLighting — Thu, 29 May 2025 20:02:50 GMT

@dsimms4 wrote:

Hi Guys,

Lid now closed after tinkering in blender.

So why are you continuing this in Fusion instead of an application that was built to work with mesh geometry ?