Help with a 3D "bowl" model

Hi Folks

I’m New to 3D Carving - followed this lesson ( 3D Tool - Add Shape)

Apologize if this has been answered before. I’m making basically a bowl (but shaped in as guitar)

1- I’ve added the “flat” shape the same height as the stock thickness - I assume this is a standard practice when working with 3D.
2- I’ve added the subtract model to the guitar vector shape.

Why do I have the “lip” in the final 3D simulation model. (There no limit in the “show 3D” 3D model)
I was expecting the bowl to start at the top edge and transition down at a 35 degree. angle. In the simulation it looks like its starting below the top edge. I’ve added the black arrows to point to the area in question.

Thanks for any insight.



Upload your file?

Inset by tool radius?

Hi Will - file attached. Be easy, it’s my first attemp. If you see anything else silly, please let me know.

GuitarPickholder.c2d (2.8 MB)

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The Stock Thickness is 30mm:

The surrounding area is modeled to a height of 25mm:

If the entire stock is first surfaced to that height:

Then the cut will be as expected:

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Thanks Will - So rule of thumb would be to make the first flat Model the same thickness as the stock.?

Is there situations where this is not true?

And is there some documentation or tutorials that I missed or should review.

Appreciate your feedback as always.

That is one approach — there is no wrong or right here — some designs are easier modeling only subtractively, others are simplest modeling to some portion of the thickness and then adding and subtracting, but if you want a flat surface at the top, then that should be reflected in the model and the toolpaths should match.

There are the online videos:

https://carbide3d.com/hub/courses/create-pro/

and I wrote up a bit at:

and various tutorials and videos at:

If there’s something you have difficulty with, let us know and we will do our best to look into this with you.

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