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 Post subject: Fracture-12, with mechanism photos
PostPosted: Wed Jun 12, 2013 2:14 pm 
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Joined: Wed Dec 10, 2008 6:26 pm
Location: Boston area
Hi Twisty Friends,

I'm pleased to introduce the latest addition to the "Fracture" series of puzzles, Fracture-12:
Attachment:
Fracture-12 yellow side.JPG
Fracture-12 yellow side.JPG [ 207.85 KiB | Viewed 1214 times ]
As you might guess from the name, Fracture-12 is based on the geometry of the hexagonal dipyramid. However, since I've truncated the two polar vertices, it actually has 14 sides.

You can buy Fracture-12 in my Shapeways shop.

See a video of Fracture-12 on my YouTube channel.

Fracture-12 turns on the six axes around the equator of the puzzle. Each axis can turn in increments of 90 degrees, but unless full four-way symmetry is shown, 180 degree turns must be used to avoid blocking adjacent axes. Here are a few more pictures of the puzzle:
Attachment:
Fracture-12 mid-turn.JPG
Fracture-12 mid-turn.JPG [ 201.06 KiB | Viewed 1214 times ]
Attachment:
Fracture-12 180 turn.JPG
Fracture-12 180 turn.JPG [ 203.45 KiB | Viewed 1214 times ]
Attachment:
Fracture-12 90 turn.JPG
Fracture-12 90 turn.JPG [ 205.09 KiB | Viewed 1214 times ]
Attachment:
Fracture-12 scrambled.JPG
Fracture-12 scrambled.JPG [ 201.8 KiB | Viewed 1214 times ]


Interestingly, because the slice planes are so shallow, the typical spherical cuts would bind up, making the puzzle too difficult to turn. Due to this I switched to cylindrical cuts, and the result is a puzzle that turns very smoothly and easily. I also tried a new core design with this puzzle. It snaps together like some of my others, but this one can also be taken apart. One of the polar vertex pieces is a locking cap that holds the snap details in place. Once that cap is removed, the core can be fully disassembled. Some pictures might help explain better:
Attachment:
Fracture-12 core.JPG
Fracture-12 core.JPG [ 135.06 KiB | Viewed 1214 times ]
Attachment:
Fracture-12 core cap off.JPG
Fracture-12 core cap off.JPG [ 176.94 KiB | Viewed 1214 times ]
Attachment:
Fracture-12 core apart.JPG
Fracture-12 core apart.JPG [ 169.69 KiB | Viewed 1214 times ]


Thanks for looking, and stay puzzled my friends!
Dave

_________________
Visit Pitcher Puzzles where you can buy the IPP award-winning RotoPrism 2, Fracture-10, and many, many more.


Last edited by David Pitcher on Thu Jun 13, 2013 11:32 am, edited 1 time in total.

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 Post subject: Re: Fracture-12
PostPosted: Wed Jun 12, 2013 3:56 pm 
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Joined: Mon Jun 18, 2012 10:56 am
Location: The Netherlands
Oh wow that is gorgeous! :D Thumbs up!


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 Post subject: Re: Fracture-12
PostPosted: Thu Jun 13, 2013 11:16 am 
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Joined: Mon Aug 02, 2004 7:03 am
Location: Koblenz, Germany
You truncated the polar vertices to save material, didn't you?

BTW: Have I missed the Fracture-8?


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 Post subject: Re: Fracture-12
PostPosted: Thu Jun 13, 2013 11:30 am 
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Joined: Wed Dec 10, 2008 6:26 pm
Location: Boston area
Kattenvriendin wrote:
Oh wow that is gorgeous! Thumbs up!
Thanks!
Andreas Nortmann wrote:
You truncated the polar vertices to save material, didn't you?
I did it mostly because I liked the shape better. The full hexagonal dipyramid is very long, with half of the form being the polar vertices. Also, the geometry is such that the truncation creates a form that can be circumscribed by a sphere, so it seemed natural to cut it there.
Andreas Nortmann wrote:
BTW: Have I missed the Fracture-8?
Nope, you haven't missed anything. I simply have yet to find an eight-sided form that can be fracture-cut.

_________________
Visit Pitcher Puzzles where you can buy the IPP award-winning RotoPrism 2, Fracture-10, and many, many more.


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 Post subject: Re: Fracture-12, with mechanism photos
PostPosted: Thu Jun 13, 2013 2:38 pm 
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Joined: Mon Jun 18, 2012 10:56 am
Location: The Netherlands
Mind.. question.. are there any screws involved to assemble this puzzle? :)


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 Post subject: Re: Fracture-12, with mechanism photos
PostPosted: Thu Jun 13, 2013 3:31 pm 
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Joined: Wed Dec 10, 2008 6:26 pm
Location: Boston area
Kattenvriendin wrote:
Mind.. question.. are there any screws involved to assemble this puzzle?
No screws needed, it all snaps together (much like my Fracture-10 and Ice-9 puzzles). So all you need are some stickers, and you're ready to be puzzled!

_________________
Visit Pitcher Puzzles where you can buy the IPP award-winning RotoPrism 2, Fracture-10, and many, many more.


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 Post subject: Re: Fracture-12, with mechanism photos
PostPosted: Thu Jun 13, 2013 4:17 pm 
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Joined: Mon Jun 18, 2012 10:56 am
Location: The Netherlands
Oh that is nifty indeed! Thanks :)


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 Post subject: Re: Fracture-12, with mechanism photos
PostPosted: Fri Jun 14, 2013 4:24 pm 
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Joined: Tue Oct 13, 2009 1:13 am
Location: Saint-Petersburg, Russia
Extremely elegant puzzle! Fantastic!


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