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 Post subject: Pentagonal Prism
PostPosted: Thu Oct 19, 2006 10:06 pm 
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Well I finally finished one of my projects! :D Here is my version of the pentagonal prism. I know it is not new, as it was in Mefferts catalog (Note the stickering I used gives the same image) and Jin has been working on one also. It turns well but is definitely not for speedcubing. I am happy with it though! :D :D


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mixed.jpg
mixed.jpg [ 71.58 KiB | Viewed 5079 times ]
facerot.jpg
facerot.jpg [ 69.47 KiB | Viewed 5024 times ]
middlerot.jpg
middlerot.jpg [ 69.95 KiB | Viewed 4975 times ]
PP&Rubik.jpg
PP&Rubik.jpg [ 79.9 KiB | Viewed 4995 times ]
DBlikeview.jpg
DBlikeview.jpg [ 27.39 KiB | Viewed 8307 times ]
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 Post subject:
PostPosted: Thu Oct 19, 2006 10:12 pm 
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Cool build!!!!!!!!! Are the sides subjected to only 180 degree turns? What I'm trying to say does it change shape at all. If it doesn't its still a cool build.


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PostPosted: Thu Oct 19, 2006 10:26 pm 
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Oh my God... it exists!!!! :shock:

Unreal design... How did you do it???





Pantazis

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PostPosted: Thu Oct 19, 2006 10:31 pm 
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is that done via rapid prototyping like your tuttminx, because constructing a custom mech for that and pieces would be wuite a task. :D

Fantastic Job!


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PostPosted: Fri Oct 20, 2006 12:39 am 
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Simply AMAZING!! I can't believe the puzzle actually exists. Wonderful job.


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 Post subject:
PostPosted: Fri Oct 20, 2006 5:42 am 
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Darren Grewe wrote:
Are the sides subjected to only 180 degree turns?
Yes, the shapes are such that only 180 degree side face turns are possible.

Ryan: Yes solid modeling of the exterior pieces followed by rapid prototyping of the unique pieces was used. Two part polyurethane copies were then made. The spider is a zome ball again but I reinforced it with Apoxy and filled with two part epoxy to give strength. It is a complete build not a mod (the only parts that came from another puzzle were 2 stiffer springs from a chinese megaminx for the top and bottom center pieces).


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 Post subject:
PostPosted: Fri Oct 20, 2006 7:19 am 
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Lee T. wrote:
The spider is a zome ball again but I reinforced it with Apoxy and filled with two part epoxy to give strength.


What is a zome ball?


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 Post subject:
PostPosted: Fri Oct 20, 2006 7:46 am 
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Haara wrote:
What is a zome ball?


"Zome" refers to a model-construction toy manufactured by Zometool, Inc..
See http://www.zometool.com/what-is-zome.html.

Lee also used a Zome for his Tuttminx. See http://www.twistypuzzles.com/forum/viewtopic.php?t=4186.

Thomas


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 Post subject:
PostPosted: Fri Oct 20, 2006 9:57 am 
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Great job Lee!

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PostPosted: Fri Oct 20, 2006 10:14 am 
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Simply amazing.

Now it's only a matter of time untill all of Meffert's unmade masterpieces are made.

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3x3 PB 22.63
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Started cubing Oct 15 '05

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 Post subject:
PostPosted: Fri Oct 20, 2006 12:33 pm 
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Amazing job, Lee!

Just out of curiosity: why there is a gap that large between the outer slices and the puzzle's center in the face rotation photo?

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 Post subject:
PostPosted: Fri Oct 20, 2006 5:12 pm 
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Very, very nice!

:shock:

Keep up the fantastic work!


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 Post subject:
PostPosted: Sat Oct 21, 2006 5:39 am 
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Lee,
You are a genius!
I didn't think it was possible!
I still can't get my head round the internal mechanism with that ball inside.
Any chance you can post some pictures of it's insides?

Great job, well done!
Vadim


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 Post subject:
PostPosted: Sat Oct 21, 2006 9:38 am 
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Aleksey wrote:
Just out of curiosity: why there is a gap that large between the outer slices and the puzzle's center in the face rotation photo?


I don't think that is a gap... If you look at the picture comparing with a normal cube, you can see that the face is square, but you have to keep in mind that the area of the slice isn't, as the hight is the same as a cube, but the slice is wider.
This would mean that it is aposibility that what you see is simply "overhanging" unstickered plastic parts of the center and "upper and lower"-edge" between the faces that are turned partialy...


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 Post subject:
PostPosted: Sat Oct 21, 2006 11:17 am 
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Aleksey wrote:
Amazing job, Lee!

Just out of curiosity: why there is a gap that large between the outer slices and the puzzle's center in the face rotation photo?
I think it's because it was a 90 degrees turn, and it only allows 180 degrees turns if you want to continue turning it. It's because the height of the 3 layers is not equal to the length of the edge of the pentagon.

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Fridrich
3x3 PB 22.63
3x3 Av 30.57

25, Male
Started cubing Oct 15 '05

Out of the game, but not completely.


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 Post subject:
PostPosted: Sat Oct 21, 2006 11:17 am 
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Vadim wrote:
I still can't get my head round the internal mechanism with that ball inside.
Any chance you can post some pictures of it's insides?

Vadim, There is nothing special about the way I used the Zome ball. It was just used as the symmetry element for the spider as in the Tuttminx.
http://www.twistypuzzles.com/forum/down ... 7b3802f21c
I then filled in around the ball with Apoxie and used a few exposed holes to fill in with liquid epoxy and finally finished with Apoxie over the holes. Here is a pic of the internal. It is basically just like a Rubik's cube but with one more arm.

Aleksey, Haara and Xcool are exactly right. Below is a picture looking straight down with the two faces rotated 90 degrees (which is not really a complete move).


Attachments:
InternalPP.jpg
InternalPP.jpg [ 45.72 KiB | Viewed 4957 times ]
topdownfacerot.JPG
topdownfacerot.JPG [ 63.38 KiB | Viewed 4851 times ]
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 Post subject:
PostPosted: Sat Oct 21, 2006 3:14 pm 
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If you were in the same room as me now, I'd give you a standing ovation (sp). Just looking at the internal mechanism. Wow. It's so... professional. Amazing. Perfect.


So, have you mixed/solved it yet? Does it use some algs from the dominoe?

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Fridrich
3x3 PB 22.63
3x3 Av 30.57

25, Male
Started cubing Oct 15 '05

Out of the game, but not completely.


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 Post subject:
PostPosted: Sat Oct 21, 2006 5:35 pm 
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Lee.......... I am absolutely speechless in front of such an magical creation.

The normal humans like me just are able to modificate existent puzzles, but you go much more far away, and even create your own mechanism.

Btw, I have to add one more name to my Puzzle God's list.............

AWESOME!!!!

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 Post subject:
PostPosted: Sun Oct 22, 2006 11:14 am 
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xcool wrote:
So, have you mixed/solved it yet? Does it use some algs from the dominoe?


I have only mixed it a little (accidently lost where I was when making the photos and had to solve it but had not introduced any layer moves at that point so it was relatively easy :D ). There are some unsusual moves going around the cube since the odd number of sides means that some new moves come in relative to rubiks (and of coarse many go away). One of the moves I use on the megaminx and rubiks is applicable (moving and rotating corners.) I am sure others are too but I am not much into solving puzzles (I have done my share but the building and mechanisms are where my real interests are.) Most puzzles I can eventually solve but a few have eluded me such as the square-1.:( :? Have not done too much with the dominoe so am not sure about algs there.


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 Post subject:
PostPosted: Sun Oct 22, 2006 11:38 am 
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Some notes on solving this thing:

The center slice can be solved after or before everything else, since even if the sides are complete the center slice can be moved separately and it's possible to use only a single slice of the top and bottom, so they never really get scrambled. I don't think there's a parity flip necessary once the top and bottom are solved to fix the middle, but just in case it's probably easiest to solve the middle first, then do the top and bottom (with only a single slice of the middle slice getting used, so it doesn't get scrambled) because that gets any parity issues out of the way immediately.

The only really notable thing about the middle slice is that to flip the orientation of a piece you have to bring it around the entire puzzle. Notably, you'd have to scramble the entire thing quite a bit for that to happen by chance.

It's possible to flip two opposite pairs of edges by alternately flipping two adjacent slices three times, for a total of six slices.

The corners can be positioned by coming up with a simple sequence which only changes one of the corners on the bottom face, then using that and its inverse repeatedly to keyhole the corners on the bottom face into place, the same way my solution to the rubik's UFO works.

I think that's all that's necessary for a solution, actually - first solve the middle, then the corners, then the edges. The parity restriction of the middle should avoid problems with parity on the final edges.

That was an interesting puzzle-solving exercise to go through, there are a few unique and interesting aspects of this puzzle (although it's probably an awful lot like the rubik's domino, which I don't actually know how to solve although it sure seems like this solution should work for it). I would of course have to actually use one of these to figure out if I got it right, and it was made a bit more difficult by not having the puzzle in front of me (or possibly not - I played around with a domino once and didn't figure it out, while I got a solution to this one in just a few minutes).


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 Post subject:
PostPosted: Sun Oct 22, 2006 1:37 pm 
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Bram wrote:
The center slice can be solved after or before everything else, since even if the sides are complete the center slice can be moved separately and it's possible to use only a single slice of the top and bottom, so they never really get scrambled.


Well, you don't have to restrict yourself to only one slice, at least as long as you remember to (after using one slice) not use any adjacent slice untill the first one have been used an even number of times...


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 Post subject:
PostPosted: Sun Oct 22, 2006 3:22 pm 
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Absolutely amazing work. Any plans of making more of these? I would love to have one. Any chance of a scrambled pic?

Thanks for sharing your work.

-adam-

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 Post subject:
PostPosted: Sun Oct 22, 2006 4:48 pm 
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Lee,
thanks for posting internal mechanism picture.
It is unebelievable how accurately you built all pieces. They look like factory-made.
This is a masterpiece!
It's a shame it can't be added to this database! :(
Vadim


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 Post subject:
PostPosted: Sun Oct 22, 2006 10:03 pm 
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IT LIVES!

Great work.

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 Post subject:
PostPosted: Sat Nov 04, 2006 3:13 pm 
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WOW. Great job!


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 Post subject:
PostPosted: Fri Aug 17, 2007 12:37 pm 
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Great job Lee!

Vadim wrote:
It's a shame it can't be added to this database! :(

Vadim: Sandy won't be gone forever (he came back and gave us the Puzzle Building forum...) so eventually he'll update the software to allow more database moderators.

I am currently named as being one of these moderators and as soon as I get the go-ahead I'll get cranking on adding new puzzles.

Be assured that I'll favor new and unique puzzles like this over just-another-3x3x3-sticker-variation puzzles (there are lots of those waiting), so we'll get the nice stuff in first.

Dave


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 Post subject:
PostPosted: Fri Aug 17, 2007 3:03 pm 
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Amazing, really amazing, this is a really nice puzzle !!! :D :D :D
Do you know if you'll make some for sale :?:

Nice job man it's really well done.


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 Post subject:
PostPosted: Sat Aug 18, 2007 8:15 pm 
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So what did you use to make it?

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 Post subject:
PostPosted: Sun Aug 19, 2007 3:08 pm 
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Lee T. wrote:
Yes solid modeling of the exterior pieces followed by rapid prototyping of the unique pieces was used. Two part polyurethane copies were then made. The spider is a zome ball again but I reinforced it with Apoxy and filled with two part epoxy to give strength. It is a complete build not a mod (the only parts that came from another puzzle were 2 stiffer springs from a chinese megaminx for the top and bottom center pieces).


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 Post subject:
PostPosted: Sun Aug 19, 2007 6:25 pm 
this is just another reminder as to why i need to learn to build more then bad quality 2x2x3s. nice job!


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 Post subject:
PostPosted: Sun Aug 19, 2007 9:36 pm 
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lol
you too you have difficulty to build 2x2x3, I have build one I past a lot of time on it, but it always pop up because the center layer doesn't fallow the other, and then, it pop up. Can someone help me with this... please :oops:


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 Post subject:
PostPosted: Sun Aug 26, 2007 12:58 am 
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Thanks to Lee Tutt, I was in the opportunity to try his magnificent Pentagonal Prism.
It is really a fantastic puzzle. It looks great and turns great as well. A real masterpiece as was mentioned already also by several people at this forum.

I was curious how difficult it is to solve. So, it was great to try it in practice.
I also asked Dieter Gebhardt from Germany for his opinion.

Dieter may not be very well known to most people at this forum but at the NKC (the Dutch Cubist Club) and CFF (the magazine of NKC), Dieter is very well known for his many articles on puzzle solutions over many, many years. Dieter came up with a very elegant solution for the Pentagonal Prism. In agreement with Lee and Dieter I am presenting the solution here. It is in the original handwriting of Dieter himself.

Geert


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Pentagonal prism solution by Dieter Gebhardt.jpg
Pentagonal prism solution by Dieter Gebhardt.jpg [ 188.12 KiB | Viewed 4481 times ]
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