Hey guys, first post here. Me and my partner are trying to embed NFC chips in tokens that we are 3D printing. Basically what we want is a token that is 40mm in diameter to have a square void in the middle of it of 20mm to embed this chip. When we model this with Rhino we are not able to boolean t…

Hi Tyler, This might be a solution: [image] Creating a hollow solid object Rhino for Windows You can do this in Rhino with polysurfaces. It is generally not recommended, since the result may not behave as expected in other Rhino operations, but should be fine for your pu…

Thank you! I will try this when I get home.

Just curious, how do you 3D print the object with the chip inside? –Mitch

The other thing we used to do in the old days was to join the inner and outer surfaces with a tiny tube. Depending on what 3d printing technology you’re using (I presume FDM since its the only one I can think of where you could embed the chip by pausing the printer halfway through the print) this tu…

+1 on tiny tube connecting the inner void to the outer surface- very easy to see if it’s right And easy to fix if it’s not. k

Noteworthy I guess: The tiny shaft be best placed in the horizontal (printing) plane, thus appearing only in one slice (if at all) -Willem

I’m guessing if you would make the tube 1 micrometer, or even smaller, it would not be noticeable on the printing? Or would the software for printing actually prioritize the fact there should be á hole no matter how small, and create an opening at the minimum size it can?

Depends what software you’re using for printing. I have an Ultimaker and use Cura. It doesn’t treat tiny features any different from large ones. I actually have to draw vertical holes 0.3mm larger than I want them because internal radii come out too small, even though the external dimensions of obje…

So I thought I’d try what you’re doing, and you don’t need a tiny tube. I just draw a sphere in rhino, then a cube inside it. Exported that as stl, and opened in Cura (my 3d printing slicer). Here’s a screenshot showing the print halfway through, and you can see it has recognised the cube in the m…

So the 3d print software just counts an object in an object as empty space? That seems like a nice approach of the Cura guys.

Create a void in the middle of a solid?

Rhino Rhino for Windows

Willem (Willem Derks) January 15, 2014, 11:25am 2

Hi Tyler,

This might be a solution:

HTH
-Willem

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Create a void in the middle of a solid?

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