r/gifs Jul 26 '21

I made Entwined Mobius Gears: v19.10 more Rainbow

1k Upvotes

111

u/YummyPepperjack Jul 26 '21

WHAT THE FUCK... I thought this was just another 3d animation!

This is a really clean build!

87

u/elmins Jul 26 '21

Unfortunately, I'm not that good at 3D animation... so I had to build it instead.

32

u/EntropyMoose119 Jul 26 '21

Weird flex but ok

1

u/Plumb_n_Plumber Jul 27 '21

I so feel for you.

2

u/Au_Mind_QuestionMark Jul 27 '21

SERIOUSLY

I thought I was looking at r/LoadingIcons

2

u/Waynard_ Jul 27 '21

I literally said out loud "oh dam, it's REAL!!" and startled my coworker lol.

71

u/WolfieWins Jul 26 '21

Next scene someone comes in with a knife and it’s a cake.

9

u/ackguy Jul 26 '21

That made me laugh.

21

u/rich1051414 Jul 26 '21 edited Jul 27 '21

Odd number of gears as well. That normally wouldn't be possible, but the mobius strip makes it possible. The gears rotate along an additional axis, so the gear direction reverses after arriving by the time it arrives back at the start.

Edit: Made it a bit clearer.

4

u/spikes2020 Jul 27 '21

This is what makes it really amazing and needs to be higher...

3

u/abarrelofmankeys Jul 27 '21

Oh holy shit. This made me look at it hard enough to realize they twist to the second loop.

I mean the title suggests that but I couldn’t see it at first. That’s amazing.

2

u/PhasmaFelis Jul 27 '21

Shit, I hadn't noticed that. It gets better and better.

14

u/Perpetual_Doubt Jul 26 '21

I had just convinced myself this was a graphic when the hand appeared.

17

u/elmins Jul 26 '21

You may remember my last post on Gifs over a year ago . This new one is has the gears from v16 (v19 of the gears is in the works), which has got better colour, but the gears wobble more because the tolerance on the SLS printed part are worse (Main tolerance issue I've tried to solve reliably). The base that drives it has most of the improvements since then. It's not perfect but I'm happy with what I've achieved so far.

Here's a video showing much more of the insides.

The idea is from this gif. Its just a desk toy, like a Newton's cradle. Looks interesting, but not useful. I designed it in Solidworks and 3D printed in PLA, with SLS Nylon core commercially printed.

It has an odd number (15 here) of gears that mesh sequentially in a loop, which wouldn't normally be possible, but this twists 180 Degrees while going around 2 times and joins onto itself. A Möbius loop is a loop that twists 180 and joins onto itself, like this. It loops around through itself (self-intersecting) as an interesting feature, that also keeps it compact. The rainbow helps make it more obvious.

One way of thinking about it is: A typical mobius loop is a circle of paper, split, one end twisted 180 and joined. These gears is like a paper that can go through itself circled twice, split, one end twisted 180 and joined.

The base is now silent, safer, faster to print, more robust, faster charging, soft rubber feet (using Orings), has it's own tool holder, and far more tunable in terms of speed/power. It also contains the first PCB that I designed,

Previous version/posts(now over 2years old):

Version 1 , Version 2 , Version 3 , Version 13 , Version 15

Construction:The gears are printed in 2 halves with the balls individually inserted then glued together around them. Tedious to say the least. Here's a fast time lapse of it.

The only thing left to solve with the design is making the core component (Pic of one here) reliably to a good tolerance. The tolerance required is much tighter than standard 3D printing.

It's not done yet, but I mostly post progress on my Instagram, Youtube, and Facebook as ElminsCosplay.

3

u/Au_Mind_QuestionMark Jul 27 '21

Could a person purchase one of these at some point? This is such a beautiful work of engineering magic it would be an honor to have one.

3

u/elmins Jul 27 '21

I've been asked it a lot, but it's only till this version that the base of it has been good enough. The last thing to solve is reliably making the core part of the gears, which has been the hardest. I am planning to make some to sell, but I don't want to make any promises of time because I don't know how to solve this last issue without making it cost a lot more.

If you compare this one to the gears on v15, you'll notice how much more they wobble, and that's only a 0.18mm difference. Although it's hard to convey how different a great one feels vs an "okay" one when rotating it by hand (it can be detached from the base easily) and I want them all to be great not just "okay" like this one.

1

u/bigwebs Jul 27 '21

Some people are too smart

1

u/elmins Jul 27 '21

The basic concept of it isn't all that complicated, but the devil is in the details. 15 gears, 180 degree twist, so just position them all in a circle and tilt them 180/15= 12degrees from one to the next, stick em together (in CAD). The hard part that every gear in this is slightly different in many ways and the thousands of small measurements that make up other parts.

It's a 1% inspiration, 99% perspiration kinda thing. The gears actually rotated by version 2, the motorized base "worked" by version 3, but it was only till version 15 that the gears rotated smoothly, and version 19.10 that the base was good enough.

1

u/Plumb_n_Plumber Jul 27 '21 edited Jul 27 '21

First time looking at this. I LOVE how you took an idea - that gif, I guess, and ran with it, as they say, for so many evolutions. Iterations I could say, but evolutions of revolutions also would describe it. Any rate, I can only imagine the thought and effort going into this and though someone else’s mom (I hope not yours) might say you were obsessed, I applaud instead because you most definitely have learned so much. I’m at the other end of my career and I am very happy you shared this. Thank you.

Edit: punctuation, words. Words

1

u/elmins Jul 27 '21

Thanks.

I do have a pretty bad habit of going over the top on projects; this was only meant to be a smaller side project. My other major project (See this video), was a first attempt at cosplay, but ended up winning a bunch of awards, including a Guiness world record at the time (much to my surprise). The successor to that has been in the works for the last 4-5 years, which I'd definitely classify as an obsession; the gears at but a small fraction of total thought put in by comparison.

Although the concept of the gears are simpler than it seems, the subtle details of execution make up 95% of it. Like how every gear and position is slightly different in several ways. Although it is a pretty difficult object to examine constantly compared to most things, sort of like working on an optical illusion.

1

u/BrushGuyThreepwood Jul 27 '21

In can't take my eyes off, it's mesmerizing.

3

u/Renieuwer Jul 26 '21

This is like oddly satisfying! Nice!

1

u/elmins Jul 27 '21

Thanks. I submitted also over at r/oddlysatifying just now.

It definitely gets mixed feelings, some don't find it satisfying at all because the brain melting element of it.

3

u/ringobob Jul 26 '21

Huh. Wouldja look at that.

2

u/DudelinBaluntner Jul 27 '21

1

u/elmins Jul 27 '21

Thanks for the suggestion. I posted it over there just now. Isn't satisfying for everyone, but some people definitely find it satisfying.

2

u/Splaishe Jul 27 '21

Incredible work, seriously. I’d kill to have one of these on my desk or wall

2

u/elmins Jul 27 '21

I hope to be able to make more of them for other people, but making the core part is difficult to do. The construction is more of an art at this point, as the failure rate has been way too high doing it without really focusing on the method.

It's really close to being done though, just the last piece of the puzzle is the hardest to solve and a constant source of issues.

1

u/CoachiusMaximus Jul 26 '21

Yeah you did. Awesome.

1

u/Dontlagmebro Jul 26 '21

Were the gears 3d printed intertwined or were they clipped together? Can't see a seam.

2

u/elmins Jul 26 '21

They're printed as 2 halves and glued together around the balls. There's a few ways of doing it, but I was trying to make them as seamless as possible.

2

u/Dontlagmebro Jul 26 '21

Thanks for the response. You did an excellent job of that!

2

u/Dixo0118 Jul 26 '21

What powers the second set of gears? The primary is attached to one set but not the other?

4

u/elmins Jul 26 '21

The white gear drives 1 of the gears in the loop. All the coloured gears are connected together, it's easier to see if you carefully follow one to the next.

It has 15 gears in the loop. An odd number of gears normally can't work (think of 3 in a loop trying to turn, 2 will have to be the same way), but it works because it's a type of mobius loop.

4

u/Dixo0118 Jul 26 '21

Ooohhh. I thought there was a vertical set and a horizontal set

2

u/OmegaBaby Jul 27 '21

It took me some time to figure it out too. Then I was REALLY impressed.

1

u/NWMSioux Jul 26 '21

That’s gorgeous, incredible, so well crafted, and for some reason stressing me TF out. Very well done!

1

u/vangsvatnet Jul 26 '21

Beautiful. Is there any practical use for these outside of artwork?

2

u/elmins Jul 26 '21

None. It does demonstrate some interesting things, like what 3D printing can do, a mobius loop of gear entwined with itself, and an odd number of gears looping.

This arrangement or any variation similar (i.e. if it was actually in something mechanical) is strictly less effecticent than regular arrangements. The gears are all off-axis to the next ones and, because each meshes with 2 different off-axis gears, it's basically impossible to make an "ideal" gear tooth, like standard gears can.

1

u/I_play_elin Jul 26 '21

I thought this was a render until your hand entered the shot.

1

u/Rebel324 Jul 26 '21

I'm so confused.

1

u/blackmilksociety Jul 26 '21

I’m impressed

1

u/ackguy Jul 26 '21

My head started hurting just watching the gears….then you had to go and make it rotate! Owie!

1

u/Styphin Jul 26 '21

Thank you this broke my brain

1

u/BlueNodule Jul 26 '21

That's actually insane. I spent like 3 minutes staring at it trying to figure out what was happening.

1

u/UnrulyMicrophone Jul 26 '21

Me: “Oh it’s one of those 3D animations that tend to break my brain, that’s coo-“

hand activated more movement

Me: “…… Uh-ha- o- hm. Fuck”

1

u/logic_prevails Jul 27 '21

I bet getting the last gear on was a bitch

1

u/elmins Jul 27 '21

Yeah, it is. I have to thread both halves in such that there's maximal space on one side, then kind of flex them apart. Although it's designed that the whole loop is preloaded against each other, so it wants to force the 2 gear halves out of alignment while doing it.

1

u/AmiraMoonstone Jul 27 '21

My brain hurts help me

1

u/Late_Again68 Jul 27 '21

If I had this on my desk I'd never get anything done. Very nice!

1

u/Marcudemus Jul 27 '21

It was killing me trying to figure out how the horizontal hears were moving because only a vertical gear was interfacing with the driving gear.

It wasn't until the second spin-around that I suddenly realized, "Oh shit!! I just got M.C. Escher'ed!!"

1

u/schiz0yd Jul 27 '21

i get that the one wheel turns half of them but how do they turn the other half that are perpendicular?

edit: oh its a mobius strip arrangement that explains it. i knew it didnt make sense the way i was thinking

1

u/Veruca5alt Jul 27 '21

Haha wow that’s awesome. I think r/lsd would love this.

-1

u/[deleted] Jul 26 '21

No! This is just a picture with a line circling the middle, sorta like it’s loading. I can’t believe fake stuff gets so many uplikes 😤😤😤😤😤😤