How to get a "pattern" from stl model

I have a 3D model in STL format (or compass format). I want to create a pattern from this model so I can cut it out of 1mm thick metal sheets in the future.

First, I converted the STL model into NURBS.

Second step

For some reason it didn’t work, the file itself increased to 150 MB.

How to reduce the number of edges in NURBS ?

Here’s the project itself (I’ll upload the stl file or compass file tomorrow, unfortunately I don’t have one on this computer) .

Hi @timob2567
Since the part isn’t constructed as a sheet metal part, it won’t unfold like a sheet metal part, so my best bet would be to reconstruct the entire thing using the mesh part as reference. Unroll doesn’t just magically create a flat pattern from any random 3D model (mesh or NURBS), so for an object this simple, I’d go for a complete redraw in NURBS, constructing it as an actual sheet metal model, instead of “just” a solid block. As an alternative, if you don’t need it to be too precise, you can UV Unwrap the outer layer of the mesh, but first you need to decide where to put the seams and unweld those vertices, so that it’ll unwrap in a proper way.
-Jakob
-Jakob

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