Any interest in helping design plans for a three sided plant pyramid?

[barrysumpter]

Triolife Plant Pyramid | Urban Zeal Planters

Can't seem to find one here.

But would love to have a fair go at building it myself.

Anyone interested in designing one for me with the cut angles etc. ?

[barrysumpter]

Compound Miter Saw Calculator

[barrysumpter]

https://www.youtube.com/watch?v=7aujpCKeuYw

https://en.wikipedia.org/wiki/Tetrahedron

[barrysumpter]

https://www.youtube.com/watch?v=Kz3OpsgDiz0
Cube, Tetrahedron, Octahedron, in Google SketchUp

[barrysumpter]

63085853_559123_full.jpg 63085853_559124_full.jpg minmax.ms.jpg minmax2.ms.jpg minmax3.ms.jpg

2016 01 21 - 7 Tear Triangle Planter 2016 01 21.skp

[barrysumpter]

measurements.jpg

[barrysumpter]

(apex) height of a tetrahedron

height h = (√6/3)a where a = length of an edge
so height equals square root of 6 devided by 3 times length of an edge
h = .816 * a

a = 1.5
.816 * 1.5 = 1.22

[barrysumpter]

3 Shelf - 35"L x 35"W x 24"H = 90cm L x 90cm W x 61 cm H
5 Shelf - 47"L x 47"W x 47"H = 120cm L x 120cm W x 120cm H
7 Shelf - 59"L x 59"W x 59"H = 150cm L x 150cm W x 150cm H

[barrysumpter]

Tetrahedron 5.skp

[barrysumpter]

Untitled.jpg

[barrysumpter]

Compound Angle Calculator ::: Mitered and Butted Joints

Compound Angle Calculators

Compound Mitre (values in degrees)
Slope: 60
Included Angle: 3 Sides

Resulte:
End Angle: 90
Bevel Angle: 60

====================================
Calculate Slope
Slope (degrees): 60
====================================
Compound Angle -- Butted Joint (in Degrees)
Slope A: 60
Slope B: 60
Included Angle: 3 Sides

Results
Side A end angle: 90
Side B end angle: 90
Bevel angle: -30

=========================================

I really like these results as the are part of the mystery of 3,6 and 9.

I have no idea how to translate these into my drop saw Mitre angle and Bevel angle.

[billrule]

I thought you were going to get it all worked out yourself the way the thread was developing. I am probably no help, but I can't hep observing that not one of the angles that appear in the photos of the real thing are anything like 90Degrees, so I'm unsure of the "side-angle" parameter.

Since you know roughly how it should look, cut the 30 and 60 degrees from cardboard or scrap, and have a play setting the saw to match those angles in the two adjustable parameters (whatever you'd call them)

Cheers,

Bill

[barrysumpter]

Yes, thanks for the acknowledgement.
The 90° is for Butted-joints I think.


I've sorted out the 30° bevel left and right and the 60° Mitre angle left only.
My 909 12" 305mm double mitre sliding saw will only do a 60° on the left and 52.5° on the right.

So wishing I still had the Makita LS1216.

The first join was easy the next will have to be very accurate length wise as well.

[barrysumpter]

Compound Angle Calculator ::: Mitered and Butted Joints

Compound Miter in degrees

Slope 60
Included angle 60 degrees or 3 sides

<calculate>
End angle 40.89
Bevel Angle 40.59


IMG_3109.gif IMG_3118.jpg IMG_3117.gifIMG_3116.jpg IMG_3115.jpg IMG_3114.jpg IMG_3113.jpg IMG_3112.jpgIMG_3111.gif IMG_3110.gif IMG_3108.gif IMG_3119.jpg

[barrysumpter]

For some reason I can edit my posts straight away.
And other times I can't.

I wanted to discuss the inaccuracies of my 909.
And setteling for what I make since its just for my back yard, etc.

My worry it that 1mm off on such a small version would be 10mm off on a version 10 times bigger.

And then wanted to discuss how to translate the angles rounded of the 41 and 49 and the limitations of the marked 45° bevel, etc.

Was trying to sort out the 30, 60 and 90 butted-joins but wanted to end the day on a positive note so stopped there.