Semicone how to cut the wood slats

[Thor Sten]

Hi guys, I really need help. I have a brainfuck. Before I spend money on wood, I designed the beams with all angles as a 3D model, printed it on the 3D printer and start to assemble the dome. But it does not fit. I do not understand anything anymore. Does anyone know what I'm doing wrong.

[Adam Winter]

KISS.  Start with a 3v icosahedral.  It only has three strut lengths.   You have eight here. 

On Thu, Oct 5, 2023, 9:10 AM Thor Sten <law8r...@gmail.com> wrote:

Hi guys, I really need help. I have a brainfuck. Before I spend money on wood, I designed the beams with all angles as a 3D model, printed it on the 3D printer and start to assemble the dome. But it does not fit. I do not understand anything anymore. Does anyone know what I'm doing wrong.

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[Dx G]

Good advice.  One could go even further, as a 2f icosa Class 1 only has 2 strut lengths.  At least if that one doesn't go together right, it might be easier to figure out where the fault is.

DxG

[Ashok Mathur]

For 2v and 3 v dome use data fro this site as it has very good data for using wooden beams

https://acidome.com/

Ashok

Regards

Ashok

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[Adam Winter]

I'm partial to the Palindome if you want just two strut lengths:  https://patents.google.com/patent/US9506240B1/en

 (of course, I'm biased)

Adam Winter

The Bootstrap Music Co.

206-430-4425

bootstrapmusic.com

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[Bryan L]

Without the geometry and dimensions of your pieces, it is impossible to see where your error is. It looks like a Kruschke geometry, correct? Is it possible the 3D printer is not exact enough?

Bryan

On Fri, 6 Oct 2023 at 03:10, Thor Sten <law8r...@gmail.com> wrote:

Hi guys, I really need help. I have a brainfuck. Before I spend money on wood, I designed the beams with all angles as a 3D model, printed it on the 3D printer and start to assemble the dome. But it does not fit. I do not understand anything anymore. Does anyone know what I'm doing wrong.

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[Dx G]

Adam,

  Very interesting.  I'll have to spend some time studying this configuration.  There are several domes that only have two struts and are made of all the same triangle, such as a Class 2 ico 2f or its "close cousin" (as per Gerry Toomey) the pent dod.  What advantage does this confer out of those.  The pent dod has only one dihedral angle for the entire dome, which is also advantageous.  

thx

DxG

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[Ashok Mathur]

Dear Adam

Thanks for link.

This time I will build a bamboo stick model using the longer strutscto be 10 cm.

Regards

Ashok

Sent from my iPhone

On 06-Oct-2023, at 8:11 AM, Adam Winter <gravity...@gmail.com> wrote:



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[Chris Belcher]

I’ve also been working on a similar design strategy, hoping to use off the shelf 1x2 boards and a miter saw, and found those compound angles to be tricky.

Are you using mortise and tenon joinery at the vertexes?

Good luck!

-Chris

Sent from my iPhone

On Oct 5, 2023, at 12:10 PM, Thor Sten <law8r...@gmail.com> wrote:

 Hi guys, I really need help. I have a brainfuck. Before I spend money on wood, I designed the beams with all angles as a 3D model, printed it on the 3D printer and start to assemble the dome. But it does not fit. I do not understand anything anymore. Does anyone know what I'm doing wrong.

<2023-10-05 17_48_18-Window.png>

<2023-10-05 17_45_34-Window.png>

<20231005_154740681_iOS.jpg>

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<2023-10-05 17_48_18-Window.png>

<2023-10-05 17_45_34-Window.png>

<20231005_154740681_iOS.jpg>

[Adam Winter]

DxG,

As the patent explains:  the floor area - to - strut length ratio is higher.  It's almost the same as a 3v icosahedral.  Also, significantly, there are square apertures / right angles in the structure that alleviate the need for custom-built triangular windows & doors etc...  It's also even on both axes, making the footprint more manageable, and allowing for the structure to be expanded along the straight lines that bisect it.

Thanks

Adam Winter

The Bootstrap Music Co.

206-430-4425

bootstrapmusic.com

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[Levente Likhanecz]

hi,

cut 1 of your dome carboard triangle (the sides are the proper strut lengths). stick a line (shoe lace) into the floor.

fix the vetices of the triangle on your dome radius, then measure angles.

cheers

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[Levente Likhanecz]

something like this