I’m trying to boolean a 3d printable model I downloaded to include a magnet recess.

I converted the mesh to nurbs, and created the magnet volume, that is to be subtracted from the main model.

I was expecting to create a mew model with the hollow to allocate the magnet, but it’s not working.

The boolean operation fails and difference says there is no intersection between models.

The two models look like closed polysurfaces, but I’m evidently missing something obvious…

Any help is greatly appreciated.

Thanks in advance.

Massimo

The model and the original stl…

Magnet test.3dm (9.5 MB)

Ducky_Flat_-_50_percent_larger_135_deg.stl (180.8 KB)

Hi Massimo - Boolean operations require an intersection at the faces of the input objects - i.e. the result cannot be disjoint as you show here. In any case, assuming you were to have such an object how would you get the magnet in? If you extend the cylinder through the bottom of your shape, the Boolean will work.

-Pascal

Thanks!

There is a trick I would try that supposedly stops the printer ad a certain layer.

The idea is to start the print, pause it at the end of the magnet eight, insert the magnet and resume the print…

So I’ll probably have to do a double pass, a boolean till the bottom, and a boolean union to close the external part of the hole itself?

Thanks again,

Massimo

Hello - if you have the trick, then I would do this:

Use the original mesh.

Make a `MeshCylinder`

where you want the magnet cavity.

Flip the cylinder to point its normals inward (`Flip`

command)

`Join`

the two meshes into one disjoint mesh (this is allowed with meshes).

-Pascal

Thanks.

Your suggestion worked perfectly.

Now I only have to check if the pause command is really working…

Cheers,

Massimo