- cross-posted to:
- hobby@hexbear.net
- cross-posted to:
- hobby@hexbear.net
Decided to make a sierpinski’s tetrahedron as a first REAL project! I built a shitty angleiron workbench (with an old door ziptied onto it as the tabletop) before but I’m actually trying this time so it’s different
170 welds completed so far 
!! So, only 346 left to go!!.. 
This was a really good idea until I remembered how complex fractals are, like GIRL, DUH, fuck was I thinking hahaha
Its REALLY scuffed though, I’m talkin like using my stick welder to melt a half inch off the end off of the pieces I had precut to make it shorter so it will fit in the actual dimensions needed, I’ve been holding the smallest (~2") pieces with a wrench and holding it in place freehand. It’s been a lot of fun so far, and I’m definitely improving as I go, I weld my welding stick to my stock way less often now, and achieve arc much more reliably too, which is cool to see my own progress within the project!
I hurt my shoulder a bit ago so I haven’t been able to do much lately, but welding is pretty low impact in that I mostly just sit on a folding chair in my driveway next to my shitty workbench lol
Have some more views!
When it’s done it’ll look like this image I found on google
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This is some baller stuff, I’ll join the sea of voices and say I also want to try out welding. Maaaybe I will if I can make something half this cool.
You can trust me, do it do it give it a try if its within your means!
I’ve been holding the smallest (~2") pieces with a wrench and holding it in place freehand
a very cheap quality of life improvement here would be some welding magnets so you don’t have to hold the work
YO, THANK YOU
This is super cool.
Also welcome back
…I keep saying I won’t buy a cheap welder, then all these cool hobbyist comments. I don’t have space. Wait till after I can build a big shed…
if you have a patch of grass you can put a folding table on within range of an outlet (mine is plugged into a long ass extension cord that is plugged in IN MY KITCHEN cause I don’t have outside outlets) then you have the space!
You know what you can build the shed with? A welder.
Hmmm… you devil.
Welp, no choice but to watch five hours of shed-welding videos and gauge my chances of hilarious DIY accidents.
if you could kill yourself easily with an arc welder, I would be super mega dead right now
▲ ▲ ▲Hello quillquote
Very cool tetrahedron
Hello! Long time no see comrade!
Thank you very much :3
that’s awesome!
Oh shit Quill, been forever since I’ve seen you around. This is looking really cool and I hope to see it finished.
Hiii!!! It’s good to see you :D Thanks so much ^~ ^
never fear, I will definitely post updates!
Oh wow that’s really cool! I’m going to start learning how to weld next month, but it’s mostly as a support skill for my woodworking. Clamps specifically are insanely expensive where I live, so being able to make my own clamps from cheap flat iron bars will save me a preposterous amount of money in the long run. Your tetrahedron looks sick, way beyond the level of complexity I think I’ll aim to achieve in welding lol congrats!
It is HUGELY useful with woodworking projects so far.
Plus, unlike when you glue wood stuff its instantly strong so whipping stuff together for even a jig or such can be really really fast, and super sturdy.
My next practical gambit here will be making some tools for myself, I’ve also been learning blacksmithing (I have an adorable little 20kg anvil and I turned a pressure cooker into a forge) but with my shoulder hurt I’ve been… not blacksmithing for the time being :(
P.S. please share your design for your clams when you build them, I too could use more clams and I LOVE making shit instead of buying it if possible
Insufficiently hexagonal
You’re on the wrong website pardner
I’m not saying this to be an argumentative debate-bro, and it’s been a long time since I’ve forgotten abstract algebra, let alone found myself able to quickly work these things out, but l think usually where there are equilateral triangles, there are hexagonal symmetries (in 2d and 3d spaces)
happy cake day btw
thank you!
I’ll grant you that there’s a square there, but there are no hexagons on that thing, I guess you could use 6 to make their bases make a hexagon tho :U
It’s too late. I’ve already sloppily depicted my argument illustrating the flattening homomorphism between the tetrahedra and a hexagonal graph in multiple colors, without regard for anybody’s eyes
Sorry, but I have already depicted myself as the cool hexagonal graph, and you as the - also cool - tetrahedra.
What hexagonal symmetries mean is slightly different from a shape being made out of hexagons. If you were to take a hexagon and rotate it a certain amount or flip it you will end up back where you started. You can make a set of actions that keep the shape the same, that would look something like {60° rotation, 120° rotation, 180° rotation…}. That set is its symmetry group. If an object has hexagonal symmetries, it has the same set, so even if it looks nothing like a hexagon you would be able to do all the same things you’d do to a hexagon and keep it the same.
edit: source if you wanna learn more
Hell yeah
I’m thinking, “Did you measure the door?”
Oh yeah its largest edge size is 18"
that rules
That is so fricking cool!!! Do a rhombic dodecahedron next!!! jk haha unless…
I very well might do a Menger Sponge to use as a table or stool or something, but that’s a cool shape too! do you have a particular affinity for it?
Side note but I found it while googling just now and apparently this lady made this KICKASS origami menger sponge, holy shit
Photo looks weird tho, but I can’t tell if bad 90s camera or editing happened
Mengers sponge is really cool as well though. I like the rhombic dodecahedron because it has some nice mathematical properties like tesselation, symmetries, it retains a lot of the properties of a cube (since it’s “made” from one) but isn’t nearly as boring. I wonder if mengers sponge could be made with rhomic dodecahedra as wel…
Shoutout to my rug for co-starring in this post
