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 Post subject: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 3:10 am 
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Hi Twisty Puzzles fans,

Pancake Cube is a twisty 3x3x27 shaped to a cube. It is functionally similar to the WitEden 3x3x9, albeit with many more layers.

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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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 3:46 am 
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C'mon, no checkerboard!?


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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 4:26 am 
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That's nuts!

One interesting thing I note is that this is essentially a bandaged form of a proportional 27x27x27! Could you unbandage this design in one, or maybe even two dimensions while keeping it proportional? Possibly a 3x27x27, or at least a 3x9x27?

Non-Guiness WR: Greatest number of new puzzle videos posted with guest appearance by a cat?

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 5:07 am 
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KelvinS wrote:
Could you unbandage this design in one, or maybe even two dimensions while keeping it proportional? Possibly a 3x27x27, or at least a 3x9x27?
Could you unbandage a cubic 3x3x6 into a cubic 3x6x6? No. Why not? Well, one of the corners of the 6x6x6 face would fall off. Same for N>6.

Oskar

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 5:52 am 
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Then just keep the corners bandaged?

Which leads to another question: What is the minimum bandaging required to prevent a 27x27x27 falling apart?

And there's your next "impossible" challenge! :D

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 6:02 am 
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Brilliant puzzle and great to see boundaries pushed further.
I will bookmark this thread because I will need it for reference purposes when we are talking about your 27x27x27 in a few years time.

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 6:40 am 
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:lol: Tony!


Great work Oskar! 3x3x9 was solved way too fast for me ;) heheh Can't wait to get my hands on this one soon :)

I love how you keep pushing the limits. Assembling this thing must have been quite time consuming I think!

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 9:23 am 
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Cubical Cuboids carried to their logical, yet insane extreme. Totally awesome.

As for the question of bandaging a proportional n*n*n to prevent the corners from falling out at high N, are the outer layers of the 17*17*17 an integer multiple of the inner layers in thickness? If so, what would be the value of n if you unbandaged those outer layers? Assuming the corners already have the minimal banaging required to avoid the puzzle suffering spontaneous existance failure, could the 17*17*17 edges be unbanaged?

d

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 9:49 am 
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I want to say this is insane but! Consider this as an appreciation! :D


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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 10:08 am 
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A design question...

(1) With the face centers 2mm wide how did you make room for the screw heads?

I see the core is in two parts from the pictures at Shapeways. Did you screw the face centers to the core from the inside of the core and then screw the two halves together? I don't have a 3x3x9 so I'm not sure how this is accomplished there either but I would expect enough space on a 3x3x9 to allow a few options.

I saw this in your shop some time ago and I have to say I'm surprised it turns as well as it does. Congratulations! Though it sure doesn't look fun to sticker that one.

Carl

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 11:59 am 
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wwwmwww wrote:
With the face centers 2mm wide how did you make room for the screw heads?
Your analysis is correct. Four of the six centers are bolted from the inside out into two core halves. The red and orange center are bolted from the outside and then capped. The red+orange bolts hold the two core halves together. This is the reason why the red and orange centers are not split in nine, unlike the WitEden 3x3x9.

Oskar

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sat May 17, 2014 6:40 pm 
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Up next: 4x4x64!


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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sun May 18, 2014 2:07 am 
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I won't comment this myself. I want to leave this to Oskar:
4 years ago Oskar wrote:
[...] is a blatant case of twisty puzzle extremism.


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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sun May 18, 2014 6:20 am 
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KelvinS wrote:
Then just keep the corners bandaged?

Which leads to another question: What is the minimum bandaging required to prevent a 27x27x27 falling apart?

And there's your next "impossible" challenge! :D

I love it when I post a question/challenge like this and nobody responds - because I know that someone has secretly decided to take up the challenge and the next thing we know a working puzzle will be announced out of the blue in a few months' time. :P

Incidentally, I would imagine that this is one of the most dense and heavy variants of Rubik's Cube made to date, since there is no room for hollow cavities and the mechanism must be virtually solid plastic, right?

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sun May 18, 2014 7:23 am 
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KelvinS wrote:
Incidentally, I would imagine that this is one of the most dense and heavy variants of Rubik's Cube made to date, since there is no room for hollow cavities and the mechanism must be virtually solid plastic, right?
Well a solid 57mm cube would cost about £155 to print in WSF, and Oskar is charging £190 for this puzzle.

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Sun May 18, 2014 8:32 am 
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Gus wrote:
KelvinS wrote:
Incidentally, I would imagine that this is one of the most dense and heavy variants of Rubik's Cube made to date, since there is no room for hollow cavities and the mechanism must be virtually solid plastic, right?
Well a solid 57mm cube would cost about £155 to print in WSF, and Oskar is charging £190 for this puzzle.

... So just a 23% mark-up on a solid lump of plastic for all that incredible work and creativity, which makes it fantastic value for money, in my view!

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 Post subject: Re: Pancake Cube by OSKAR
PostPosted: Tue May 20, 2014 12:40 am 
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Oskar, what does the corner structure look like? I'd love to see it

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