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 Post subject: Traheptrix by OSKAR
PostPosted: Sat Feb 01, 2014 4:06 am 
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Hi Twisty Puzzles fans,

Traheptrix was inspired by Timur Evbatyrov's Trapentrix puzzle, but using heptagons instead of pentagons. Like Timur's puzzle, also Traheptrix is a doctrinaire and deeper-than-origin cut twisty puzzle. All pieces are stair-shaped with 9 steps per stair, which keeps the pieces together, especially the little triangles.

Watch the YouTube video.
Buy the puzzle at my Shapeways Shop.
Read more at the Shapeways Forum.
Check out the photos below.

Enjoy!

Oskar
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Last edited by Oskar on Sat Feb 01, 2014 4:12 am, edited 1 time in total.

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sat Feb 01, 2014 4:09 am 
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Great to see this puzzle here. Is this the same puzzle you took along to the DPP?

Awesome puzzle :)


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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sat Feb 01, 2014 5:49 pm 
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Amazing! Yet another deeper-than-origin geometry created, and what a mechanism! So much complexity from only two axes of movement.

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 11:54 am 
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Location: chicago, IL area U.S.A
Wow! This is unbelievable!
Nice design.

-d


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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 12:27 pm 
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This is just impossible!

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 1:02 pm 
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The mechanical design makes my eyes water.

Timur wrote:
This is just impossible!

For Oscar, the only thing that is impossible is impossible!

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Last edited by KelvinS on Sun Feb 02, 2014 1:03 pm, edited 1 time in total.

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 1:03 pm 
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It was very possible, saw it with my own eyes. A very cool puzzle indeed.. high wow factor :D


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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 6:08 pm 
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KelvinS wrote:
The mechanical design makes my eyes water.

Timur wrote:
This is just impossible!

For Oscar, the only thing that is impossible is impossible!

For Oskar, the only thing that is impossible is getting his puzzles mass-produced...

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 6:11 pm 
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cuberboy13 wrote:
For Oskar, the only thing that is impossible is getting his puzzles mass-produced...

I would recommend re-wording that. That can be taken as offensive.

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 6:15 pm 
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benpuzzles wrote:
cuberboy13 wrote:
For Oskar, the only thing that is impossible is getting his puzzles mass-produced...

I would recommend re-wording that. That can be taken as offensive.

Sorry if I sounded offensive. What I meant was that he has so many great puzzles, that are yet to be mass produced.

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 6:15 pm 
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benpuzzles wrote:
cuberboy13 wrote:
For Oskar, the only thing that is impossible is getting his puzzles mass-produced...

I would recommend re-wording that. That can be taken as offensive.

Personally I think that is fair market feedback, though it is also ultimately Oscar's choice. But also remember that he has had *some* puzzles mass produced, like the gear cube, and surely he can't, and shouldn't get them all mass produced! He wouldn't have time to design new puzzles, which is (partly) what we love him for. :)

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 8:46 pm 
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What an amazing build


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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 11:03 pm 
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That mechanism is not at all what I would have guessed. Crazy that you found something like that to make the puzzle work!

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Sun Feb 02, 2014 11:47 pm 
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Seeing how small that piece is on the surface and then seeing how big it looks in comparison to what it is connected to inside, makes me wonder... Oskar, just how small is some of that geometry? What is the thickness of those shells? I typically don't go below 2mm but those I suspect are even smaller. And what is the thinnest cross sectional area of that foot? Shapeways won't let you go below pi*(0.4mm)^2 and I suspect you are closer to that that I've ever gone on a puzzle part. I have used that to make sprues to temporally hold parts together and that is so thin they have sometimes already fallen apart before they get to me. So I'm quite curious how close to the limits of SW&F you have pushed things.

Also has anyone answered Oskar's question from the video yet? I see a post there that states it would be the Tetraminx but the Trapentrix and the Traheptrix only have 2 turning axes and the Tetraminx has 4 turning axes. Would it be a Tetraminx which only allowed turns on 2 axes?

Carl

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Last edited by wwwmwww on Mon Feb 03, 2014 4:10 pm, edited 2 times in total.

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Mon Feb 03, 2014 1:49 pm 
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KelvinS wrote:
cuberboy13 wrote:
For Oskar, the only thing that is impossible is getting his puzzles mass-produced...
Personally I think that is fair market feedback, though it is also ultimately [Oskar]'s choice. But also remember that he has had *some* puzzles mass produced, like the gear cube, and surely he can't, and shouldn't get them all mass produced! He wouldn't have time to design new puzzles, which is (partly) what we love him for. :)
Thank you for the compliments. Just to prevent misunderstanding: any and all of my puzzles are available for licensing for mass-production. The decision is made by the producer whether he sees a sufficient market for a puzzle at a given production cost. Needless to say that the market-to-cost ratio may not be favorable for Traheptrix. Still, if you believe that there is a positive business case, and you are willing to back that believe with $10.000, then let's talk. The actual production and distribution could be managed by one of our twisty-puzzle-producing friends in Hong Kong, Shenzhen or Guangzhou.
wwwmwww wrote:
What is the thickness of those shells? what is the thinnest cross sectional area of that foot?
The shells are 2 mm thick. The smallest cross-section is 0.43 mm^2, i.e. (0.65 mm)^2. Shapeways did not complain, and every of those tiny pieces was printed without any problem. Of course they are fragile. I could easily break one of the spares. Fortunately, they are well confined between larger pieces.

Oskar

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 Post subject: Re: Traheptrix by OSKAR
PostPosted: Mon Feb 03, 2014 2:43 pm 
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Oskar wrote:
The shells are 2 mm thick. The smallest cross-section is 0.43 mm^2, i.e. (0.65 mm)^2. Shapeways did not complain, and every of those tiny pieces was printed without any problem. Of course they are fragile. I could easily break one of the spares. Fortunately, they are well confined between larger pieces.
Interesting. Thanks for the info. To aid with dying parts on my version 3 of the Gear Cube Kit I decided to connect the smaller tiles with a sprue. Seen here:
Attachment:
Sprue.jpg
Sprue.jpg [ 76.27 KiB | Viewed 663 times ]

Part of the inital sprue had a circular cross section with diameter 0.7mm (they measured it at 0.69mm) and a part also had a square cross section of 0.7mm edge length (they measured it at 0.71mm). They refused to print this and pointed me here:
http://www.shapeways.com/materials/strong-and-flexible-plastic
They considered this a supported wire and stated:
Quote:
The minimum thickness for supported wires; 0.8mm for this material. Please thicken the wires of the model.
So in the version they ended up printing I bumped my 0.7mm figure to 0.85mm. So for the minimal cross section I had:
pi*(0.425mm)^2 = 0.57 (mm^2)
Your cross section is 25% less. I printed extras of this very small part and I had some rings show up as two pieces out of the box and I have rings that have had tiles simply fall off as well.

Your geometry isn't considered a wire using their definition:
Quote:
A wire is a feature whose length is greater than five times its width.
Still I'm amazed they didn't complain and I'm even more amazed that things worked as well as they did.

Carl

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