Impossible Stool Improvement - Tensegrity Stool

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Impossible Stool Improvement - Tensegrity Stool - DIY JIG

Рет қаралды 343,147

4 жыл бұрын

In the first version of this "Impossible stool" I used chains
However, this had several disadvantages.
1. the chains made a noise.
2. the chair was too high and the supports broke because the lever was too big.
The new version is lower, instead of chains ropes were used and the middle part was reinforced, also supports were attached to prevent buckling.
Tensegrity, tensional integrity or floating compression is a structural principle based on the use of isolated components in compression inside a net of continuous tension, in such a way that the compressed members (usually bars or struts) do not touch each other and the prestressed tensioned members (usually cables or tendons) delineate the system spatially.[Wikipedia]
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#Tensegrity #JIG #Vorrichtung

Пікірлер: 81

@MarkMcCluney 4 жыл бұрын

I can see that this one is an improvement but I thought the first one looked a bit more elegant. Good vid and it's always a treat to see you making anything. Cheers Stephan!

4 жыл бұрын

Thank you Mark 😊

@joewoodchuck3824 4 жыл бұрын

If I understand this correctly, the center chain or rope is the only weight bearing element while the outer ones simply stabilize the entire structure.

@michaegi4717 4 жыл бұрын

The stabilization of down forces are managable. If you sit exactly in the middle just the chenter rope will be forced with your weight. If you sit on a corner the force in the middle will be twice and the oposit corner will be loaded with the weight of your body (upwards). The whole thing gets tricky if you have any twisting forces. As far as I learned from my mechanics classes the forces on the ropes can be very high in twisting cases. If I'm right you shouldn't try to keep the outer ropes too "stiff". The stool is too impressive to get destroyed but I really wonder how much twisting force this can handle.

@iIO_OIi 4 жыл бұрын

@@michaegi4717, while I know this isn't really the same concept, the chair can only rotate a little less than 90° from resting rotation (or is it torque? Idk what the word is) due to the beams of the bottom piece and top piece obstructing each other, thus the ropes might bot ever be able to reach their maximum twisting force to begin with, but I didn't even know twisting force was a thing until now so idk. (I am however aware this depends on how tight the stabilization cords are though, as well as sturdiness and elasticity of the cords.)

@michaegi4717 3 жыл бұрын

@@MrBonners I just gave an answer to the question above. But in general such videos should also mention the weekness. Because some people will spend time and money building this, and will be disappointed if it doesn't hold. In this case the question is if the side ropes just stabilize, which would suggest that you can use thin ropes. This is not a good idea. That's all I want to mention. It's not my job but build a bullet proof version to help others.

@michaegi4717 3 жыл бұрын

@@MrBonners I see, that's why you waste my time.

@iIO_OIi 3 жыл бұрын

@@MrBonners , but that would be completely unnecessary and pointless is the ~90° maximum twist the hard parts allow isn't enough twisting force to cause concern, thus the stool could be fine just as it is- if not, then sure, criss cross ropes.

@kakapokid1796 4 жыл бұрын

Nice to see a functional Tensegrity project. Would make for a great coffee table!

@h7opolo 4 жыл бұрын

Leave it to a German crafter to elevate this phenomenon to its pinnacle. i was curious about varying the shape, size, of orientation of the hemi-sections, especially as a hexagon, and you have provided me with a real-world example. Thank you! Subbed!

@sprucesoultree3833 4 жыл бұрын

I'd love to have one, I've always admired the serene balance of tensegrity structures. I hope to build some of my own one day.

@GodotWorld 4 жыл бұрын

I could, and might, build something like this for myself, but I don't think I'd ever make a chair or stool out of it. It would make a great side table, but I can see the failure point, and it wouldn't be pleasant for whomever is sitting on it when it goes. I'm almost certain if you had a fidgeter, like my kid, sitting on it that center support would be toast.

@sprucesoultree3833 3 жыл бұрын

@@MrBonners I'm 16, and my dad is unsure about it.

@putogonzalez9592 4 жыл бұрын

3 legs on each would be a cleaner look as you'd no longer need the supports.

@TheLaudi 4 жыл бұрын

Ich bin begeistert! So ein Hocker steht nun definitiv auf meiner To-Do-Liste. Allerdings tendiere ich trotzdem zur Kettenvariante, weil die irgendwie ein bisschen spektakulärer wirkt.

4 жыл бұрын

😊

@neakemiin 4 жыл бұрын

Super Stephan. So ein Stuhl musste für jene die das Gleichgewicht üben müssen ideal sein 👍👍👍

4 жыл бұрын

😊

@dennismadigan2023 4 жыл бұрын

I don't know if you can read English but, some turnbuckles could be used to tighten and adjust things

@sebastianwhitestone7504 4 жыл бұрын

Have you thought about selling these? I'd buy one instantly.

@michaegi4717 4 жыл бұрын

Ich glaube dass verdrehen ein problematische Kräfte erzeugt. Sollte es damit Probleme geben könnte es helfen die äußeren Schnüre im Zickzack zu spannen. Also nicht direkt nach unten. Ich könnte mir vorstellen dass es auch funktioniert von zwei hinteren Ecken der unteren Platte immer eine nach vorne und eine schräng nach hinten zu spannen. Wenn ich mich jetzt nicht vertue sollte das stabiler sein. Da dann vorne unten keine Seile mehr sind stelle ich mir das noch beeindruckender vor und als Stuhl auch praktisch. Ich glaube das muss ich mal in nem Modell ausprobieren. Auf jeden Fall großes DANKE für die Inspiration.

@ManojKumararch 4 жыл бұрын

You have used 2 two dimensional v shapes to form the frame hence you have created loads along two perpendicular axes hence you needed to restrain the frame against the weaker axis have you tried tetrahedron frames?

@HansPeterLehmannhpl 4 жыл бұрын

Hallo Stephan eine gut Weiterentwicklung deines Prototypen, gut geworden und danke fürs zeigen. Mfg. vom Ndrh. Hans-Peter

4 жыл бұрын

😊

@martinwolf5957 4 жыл бұрын

Nicht schlecht Stephan. Auch eine schöne Konstruktion. 👍 👍 👍 Liebe Grüße Martin 🙋‍♂️

4 жыл бұрын

😊

@jower0815 4 жыл бұрын

Ein schöner Tensegrity Sessel :)

4 жыл бұрын

Is ja wieder mal typisch, dass Du weißt wie das heist 😊

@elenin.3228 4 жыл бұрын

Danke fuer den nuetzlichen Tipp!

@LIKERorHATER 4 жыл бұрын

Ob Mulpex eine gute Entscheidung für die Halterung war, bezweifle ich stark. Ich würde massives Holz in der richtigen Faserausrichtung empfehlen. Die Positionsstränge sind dafür zwar geeignet, aber nicht die beste Wahl. Auch das die Halterung nur geschraubt und oder geleimt sind, kann nichts gutes bedeuten. Die obere und untere Halterung sind zu verankern, so beugt man ein ausbrechen vor. Ob man es hexagonal machen muss, steht außer Frage, zwei Stränge reichen aus, wenn man die Stränge spannen kann und die Halterung verankert.

@blackforest594 4 жыл бұрын

Eine Interessante Konstruktion und toll gebaut, es gibt doch Ketten die mit Kunststoff überzogen sind, die sind optisch vielleicht nicht so schön aber ich denke das dass Geräusch der Ketten so etwas reduziert werden kann

@wwscott7595 4 жыл бұрын

Different coloured socks this time must have there part to play in this as well.

4 жыл бұрын

😊

@Sadowsky46 4 жыл бұрын

Caused by the male brain

@sora2534 4 жыл бұрын

I have no idea what your saying (wish I did) but good job

@michaegi4717 4 жыл бұрын

He basically explained that he added a structure to support side forces. And repaces the chains with ropes because is is simpler to control the tension of the ropes and ropes don't make noises.

@mrupholsteryman 4 жыл бұрын

I'm wondering if there is a strong fishing line (clear) that could be used instead of the ropes. This does look like a fun project! I would use 1x1 that would give a little bit more side to side stability than the added supports. I think it kinda detracts from the initial design. I wonder if thick dowels would also work well.... 😇😎 Love your willingness to share these ideas/skills! 😇😎

4 жыл бұрын

A thin string sure looks good. But it should not be too thin. I also had thinner lines in the beginning, but they broke. 😊

@mrupholsteryman 4 жыл бұрын

@ how many thin strings could be weaved together and have the strength necessary without the attention being drawn to it?

4 жыл бұрын

@@mrupholsteryman Every single line should be strong enough to carry your whole weight.

@mrupholsteryman 4 жыл бұрын

@ now I'm thinking of just clear tubing. So instead of trying to hide...it will accentuate the rigidity. Maybe even through some LED lights on the inside of the tubes for under seat lighting. Might be an interesting bar stool for those that tend to have holes in their pockets at the bar. Can easily find what they potentially dropped on the floor. 😎😇 Thanks for the dialogue!

@jurisembergs9245 4 жыл бұрын

Great

@id9ra 4 жыл бұрын

I see TARDIS 🤯

@user-xm7xt4vh5p 4 жыл бұрын

Для чего?

@johnnytoronto1066 4 жыл бұрын

WHY?

@gerdkah6064 4 жыл бұрын

Ketten sehen aber besser und erstaunlicher aus ;-)

4 жыл бұрын

😊

@phichieutran6961 4 жыл бұрын

Cai đô mà xiếc công day la j v ad

@hansmatzweissefeder 4 жыл бұрын

hi stephan - wie oft bist du runtergefallen bis alles stabil genug war ? ich fand die ketten sahen optisch technischer aus - s'federl. 🤘😎👍💚🍺🖖

4 жыл бұрын

Runtergefallen bin ich nur einmal, als die Schnüre gerissen sind 😊

@jag217 3 жыл бұрын

Looks painful.

@Martin-xb2rz 4 жыл бұрын

Wie funktioniert das

4 жыл бұрын

Das Gewicht hängt an der mittleren Kette, die äußeren dienen zur Stabilisierung.

@generalstraw2680 4 жыл бұрын

roses are red violets are blue the titles in English why arent you

@alanolan466 4 жыл бұрын

dude you know subtitles or your ape brain doesn´t recognize the button?

@Sam-fq3bt 4 жыл бұрын

Alan Olan The only option is auto-generated German

@alanolan466 4 жыл бұрын

@@Sam-fq3bt dude you can change the subs to " traduce automatically" bruhhh

@Sam-fq3bt 4 жыл бұрын

@Alan Olan It doesn't give me the option to do so. What kind of device are you on?

@alanolan466 4 жыл бұрын

@@Sam-fq3bt it gives me the option in both pc and iPhone, what device are you on?

@jorgemateus8707 4 жыл бұрын

👍

4 жыл бұрын

😊

@beginization 4 жыл бұрын

Its in the shape of Freemasons emblem

@beginization 4 жыл бұрын

They could be sold to masons, they would love the design

@EvangelistaIsaelferreira 4 жыл бұрын

😮👏🇧🇷

@user-yl1en4fl5n 4 жыл бұрын

فيري جود

4 жыл бұрын

شكرا جزيلا

@zeugenberg 4 жыл бұрын

Ob das eine TARDIS ist habe ich gefragt

4 жыл бұрын

Ja, das ist eine Tardis. hier das video dazu kzfaq.info/get/bejne/hcCiepV8xJjMiKs.html

@LIKERorHATER 4 жыл бұрын

Eigentlich nette Idee. Umsetzung und Statik nicht für Lebensdauer ausgelegt.

4 жыл бұрын

Stimmt, man kann es auf jeden Fall verbessern

@LIKERorHATER 4 жыл бұрын

@ Es gibt immer Luft nach oben, aber ich hab mir nur vorgestellt, wie eine füllige Person darauf setzt und dachte, dass der Schichtverbund einfach ausreißt.