Toolpath for imported stl file cuts entire object as if it is clearing out a pocket

Hello, new fella here. I am trying to cut out a guitar neck from an stl file I purchased. I can open it in Fusion and everything looks fine. When I import it into easel, the toolpath it creates cuts the entire object out as if it were clearing out a pocket of the shape of the neck. I don’t know how to resolve this issue and would love some assistance.

It looks like some of the neck is missing. I see a truss rod and and a couple of carbon fiber rods cavities but it doesn’t look right to me. The heel doesn’t show up. Is there a fretboard? Is this a bass or guitar neck? Is the truss rod just a solid bar? You might want to isolate the truss rod from the neck and just try coming up with gcode for that. When I make a neck, I have a number of files. Perimeter, neck carve, truss rod rout, peghead thickness, and tuner holes.

What I would do is take the drawing apart and isolate the components.

The 3d file appears fine in fusion 360. It’s all there. It’s only when it goes into Easel that it appears like that.

This is what I have been using for 3d and it works well. 15 days for free.

MeshCAM - CNC Software - CAD/CAM Software

My instinct is that some of the faces are flipped. This causes them to be effectively invisible to some apps.

Previously I would have said to inspect it in Meshmixer, but apparently that’s an old product. I suppose you could use the built-in Fusion tools to inspect the mesh. There should be a way to inspect and flip any inverted faces.

Given that you bought the mesh, I wouldn’t be surprised. It’s amazing to me how bad thw quality of some meshes are online.