3DPrinting

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3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

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3d modeling for printing (lemmy.world)

submitted 11 months ago by user45178@lemmy.world to c/3dprinting@lemmy.world

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I've never used a 3d printer before but want to get one. I have a bit experience in blender but not too much. My question is: How do you model for a 3d print? For example, if I want to print a hollow cylinder, I go into blender, create cylinder and delete the side faces. If I print this, the walls will be pretty thin. Do I have to make them bigger manually? and if I do so (extrude and scale) does my slicer (cura) automatically fill in the solid part?

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[–] squaresinger@feddit.de 3 points 11 months ago* (last edited 11 months ago)

I mostly use solid basic shapes (like e.g. a cylinder) which I modify using extrude or moving edges/vertices and then combine using the boolean modifier, which can do union, difference and intersection.

Sometimes you have to switch to carve in the modifier to get it to work correctly.

The important thing is to only work with watertight objects. So for your hollow cylinder example I'd do the following:

Create a cylinder with the desired outer radius and height.
Create a taller cylinder with the radius of hole.
Move both onto the same location. The taller cylinder should stick out on bottom and top
Select the outer cylinder -> modifiers -> add modifier boolean -> difference to inner cylinder
Select the outer cylinder and export it with the option "Export only selection"