I’m designing some things I’ll 3d print that I want to float in a liquid – think fishing bobbers or tiny buoys. For the “can I do this?” I made a cylinder, then a smaller that fit inside, and did a boolean difference to create a hollow spot in the larger cylinder by subtracting the smaller.
What I’m not following is why that hollow spot isn’t somehow attached to the larger cylinder. I can group them and move them around and my 3d printer code (Simplify3D) must be getting the correct normals because the g-code does what I want.
Thinking about it as I write this out, my next project involves making fuel tanks that I’ll drill in to, so this must be a common problem with an obvious answer. Is there a FAQ I need to study or a chapter I missed in the manual?