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Well, I am not quite getting what you say.
Using a paint program this is the best effort I can do to explain the idea of the triangle.
The grey area is the top and the "blue" is the flanged side.
The red arrow points to the side showing the flange. It is flat. (SMOOTH?)
(Via edit. FLAT? Smooth? All flats are also smooth. No bumps. Which is probably better than I first explained.)
Why can't I use it as the "plane" to use in the mirror?
I shall TRY to get screen shots of the examples I have made that do work.
Alas I am not really wanting to flood the thread with a squillion screen shots showing how I made it.
But I created the triangle as I explained.
If the top and bottom triangles are not exactly parallel, the face will not be flat.
Why wouldn't the sides not be flat?
The bottom is made on the first plane.
The top of the triangle is made from an offset plane 10mm ABOVE the first plane. If it isn't parallel, F360 isn't doing its job.
Even if it isn't parallel..... 10mm at one side and 15 at the other...... That will only be different thicknesses.
The flange would still be flat.
Ok, I see what you want, Fusion will do some of the maths for you. You have answered most of your own questions, and given me some clues, however this sort of work is not in my atmosphere, will try and bring you back to earth.
Although on paper (and on a lot of links) they show you how these things are drawn/made: Good.
they are all just drawings, and the surfaces are 2D. No Problem, Fusion needs the sketches as foundation.
You have done really well to have one sketch in the file, but will be so much easier if you had taken the setting out from the material references you know about.
So, the diameter of the sphere is determined by the size of the hexa/panta-gons. Really?, take your word on that
But the flush (I think that's the term used) angle will ALWAYS be the same from what I can see.
Let's call it taper angle.
I am then trying to align the pieces with no overlap - as I want to get it right, rather than cheat with overlaps - and that is a whole lot of pain in itself.`
What about we let Fusion do the hard work, and we can get going.
Where did the 21 deg draft angle come from? Doesn't divide into 360 deg to a round number.
in my testing, probably way off,
To pattern the tile with 21 degrees, means 9 tiles overlap, and 8 are not enough.
Change taper angle to 18 degrees, and you get 10 tiles, your maths / requirements can be edited.
Two sketches so far, to find the centre point of the model.
I have started editing one of the files, you don't need 6 draft commands, when Extrude will do it, with the taper angle. I have a test pattern with 18 deg, and 10 tiles, to show the steps,
plug in the known sizes from your reference material, lets know if you get stuck.
Might help....
@mark33.in.oz so my question would be: What is the ultimate goal of this design ?
Is this going to result in something you want to physically make or are you just interested in the challenge of creating this geometry in Fusion 360 ?
As other posters have already show, the can be done in Fusion 360 although I'd likely take a different approach would I want to do this on Fusion 360.
However on the way from just being able to create basic geometry to actually making something there are many challenges to be overcome and I personally would be happy to be able to create this geometry very quickly so I can move on to the other challenges.
As such, I wouldn't use Fusion 360 at least to create the base geometry. I'd use Blender!
In Blender you can directly create these Geodesic structures and you have many more options through the interface than you currently have in Fusion 360. You can still export the mesh created in Blender and export it as .obj that you can import into Fusion 360 and convert into a BRep.
@mark33.in.oz wrote:
My ultimate goal?
I guess it is just an exercise for now.
OK. Fair enough!
Here is a truncated icosahedron done completely in Fusion 360:
- Mathematically precise
- Fully parametric
- with correct componet count.
- Components are designed in place (top down) and then patterned
- All assembled using a single rigid group joint.
In order to replicate this you need to understand the method of construction I used for this, which can be found on the wikipedia site. I used the golden rectangle construction method. This and the screenshot below is all you should need for now to get you started.
I am guessing it is because of lack of stuff done by me, but when I do what you say I see/get this:
So I shall have to set that up to give me colours?
Found some textures, but when I try to "apply them" to the pentagon (2D object) nothing really changes.
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