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 Post subject: Trigonal Prism
PostPosted: Sun Sep 30, 2007 9:09 pm 
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Location: Webster, NY
Hi All,
Here are pics of the trigonal prism. There are two designs for this puzzle. The first (the one on the left) I had designed and built back in the spring and was intending to use for the puzzle game when Adam (Puzzlemaster 42) sent me a design for that exact puzzle. Ironically he had chosen exactly the same size (Rubik's cube height) which drive all the external sizes. This makes the stickers identical. His internals are different than mine. I was not happy with my design because there was a tendency to pop the edge piece since the overhang of the top triangle is not much. Adam likes the spherical internal architecture as you see in picture 2. So I went and built his design too ( I only modified it to put in caps over the screw holes and added sprues for easier molding). The two designs are shown in picture 1, mine on the left and Adam's on the right (I made a smaller screw cap for his as can be seen faintly in the image. They both turn well and but, as expected, Adams' has less of a tendency to pop the edge piece. Due to the spherical internal design there is a little more tendency for the corners to point up a little instead of lying flat though. Anyway in picture 2 you can see my internal design and Adam's design. Finally I also put a picture of the trigonal prism, Rubik's 25 anniversary cube and the pentagonal prism. When Scott finishes his hexagonal prism all the Meffert prisms in his catalogue will have been made.

Tim: solved it yet? It is not all that hard to solve, as expected.

Happy puzzle building
Lee


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2triprisms.jpg
2triprisms.jpg [ 26.68 KiB | Viewed 5638 times ]
TPinternals.jpg
TPinternals.jpg [ 22.32 KiB | Viewed 5609 times ]
345prisms.jpg
345prisms.jpg [ 34.23 KiB | Viewed 5608 times ]
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 Post subject:
PostPosted: Sun Sep 30, 2007 9:39 pm 
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simply amazing.

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 Post subject:
PostPosted: Mon Oct 01, 2007 4:59 am 
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Wow, Lee,
You are a star of puzzle-making!
It's unbelievable: you even make mechanisms for your puzzles: that's way too deep for me.

Well done! they look awesome!
Vadim


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 Post subject:
PostPosted: Mon Oct 01, 2007 6:34 am 
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Fantastic, Lee!

What about the central spiders in your puzzles - how do you build them?
Are they stable enough for - not speedcubing - but continuous play?

My respect - Frank


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 Post subject:
PostPosted: Mon Oct 01, 2007 12:31 pm 
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ONCE AGAIN

FANTASTIC LEE

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 Post subject:
PostPosted: Mon Oct 01, 2007 1:50 pm 
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OMG FANTASTIC! So you made the mechs for these? And for the triangluar, pentagonal, and hexagonal prism have the same mech?

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 Post subject:
PostPosted: Mon Oct 01, 2007 1:52 pm 
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Great work. Yet another puzzle from Uwe's 1982 catalogue is finally made. I wonder when all the puzzles will be realities instead of just mock-ups.


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 Post subject:
PostPosted: Mon Oct 01, 2007 2:00 pm 
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I like that the sides of the pentagonal prism look like 3x3 sides. Can you achieve the same with a trigonal prism?


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 Post subject:
PostPosted: Mon Oct 01, 2007 2:40 pm 
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I don't see why it couldn't be done starting from a puzzle like the ones here. The middle column wouldn't be visible from the outside.


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 Post subject:
PostPosted: Mon Oct 01, 2007 3:37 pm 
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The puzzle would be related to the Rubik's Cheese or UFO, and would most likely use a mechanism similar to one of those.


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 Post subject:
PostPosted: Mon Oct 01, 2007 5:07 pm 
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Puzzlemaster42 wrote:
The puzzle would be related to the Rubik's Cheese or UFO, and would most likely use a mechanism similar to one of those.
Couldn't you bandage and truncate a 3 layer puck puzzle for that?

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 Post subject:
PostPosted: Mon Oct 01, 2007 5:33 pm 
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Noah wrote:
Puzzlemaster42 wrote:
The puzzle would be related to the Rubik's Cheese or UFO, and would most likely use a mechanism similar to one of those.
Couldn't you bandage and truncate a 3 layer puck puzzle for that?


Yes you could. I never thought of that. But I alwasy thought that the pcu kand the cheese/UFO mech was the same. correct me if Im wrong.

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2x2x2 . . . PB: 1.65 Avg: 5.32
3x3x3 . . . PB: 11.32 Avg: 17.33
4x4x4 . . . PB: 1:11.32 Avg: 1:27
5x5x5 . . . PB: 2:26.47 Avg: 2:36.04
Pyraminx . PB: 4.18 Avg: 8.43


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 Post subject:
PostPosted: Mon Oct 01, 2007 7:15 pm 
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The puck, UFO and Cheese actually all have different mechanisms.

And I just realized the center would have a problem there.


Maybe if you extended a cheese the same way you would a 3x3x5 you could do it.

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3x3 PB 22.63
3x3 Av 30.57

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Started cubing Oct 15 '05

Out of the game, but not completely.


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 Post subject:
PostPosted: Mon Oct 01, 2007 8:41 pm 
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Actually, you can make the puzzle that Puzzlemaster42 has illustrated not with a puck--the single axis on the central hub doesn't allow it to work, and the dimensions of the puzzle don't work to well either without a lot of building. However, it can be done with a UFO and some square-1 bits; I know because I am building one now!

Man, you really gotta get up early around here to have something new... :)

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 Post subject:
PostPosted: Mon Oct 01, 2007 9:20 pm 
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Lee, what do you use to manufacture the parts?


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 Post subject:
PostPosted: Tue Oct 02, 2007 2:26 pm 
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hmm, i wonder how a spindle type mech. could be worked into some of these new ideas...

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 Post subject:
PostPosted: Tue Oct 02, 2007 9:59 pm 
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Frank Tiex wrote:
What about the central spiders in your puzzles - how do you build them?
Are they stable enough for - not speedcubing - but continuous play?



They are built by solid modeling and either the spindle is used directly or else a copy in polyurethane is made. In either case I have never had one break. Adam Zamora had a screw come out when he was doing counterclockwise turns (I have not had that happen but the way I move things I typically find I make clockwise turns mostly) I may lengthen the screws on the next one I make to have it hold tighter or use a touch of lock-tite.
io wrote:
Lee, what do you use to manufacture the parts?

I use black alumilite two part polyurethane to make the parts in a silicone mold. The originals are done by rapid prototyping and solid modeling.
Lee


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 Post subject:
PostPosted: Mon Oct 29, 2007 5:44 am 
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what do you call to that star shape puzzle???


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 Post subject:
PostPosted: Mon Oct 29, 2007 5:54 am 
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Lee, I was very happy to play with the pentagonal prism a fortnight ago on DCD.
Should you ever decide to make more, count me in for one please.

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 Post subject:
PostPosted: Thu Nov 01, 2007 7:33 pm 
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Those two puzzles are completely amazing, I look at them often. You should make mass of it. Sell it the price it'll cost! I'll buy one of each even if it's 100$.


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 Post subject:
PostPosted: Fri Nov 02, 2007 5:50 am 
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lol, easier said then done Simon. Anyway, great work Lee and Adam

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 Post subject:
PostPosted: Fri Nov 02, 2007 4:38 pm 
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Georges wrote:
Lee, I was very happy to play with the pentagonal prism a fortnight ago on DCD.
Should you ever decide to make more, count me in for one please.


Lee,

Georges already said it perfectly. If you have a buyers list at all, please add me to it. The puzzle is really fantastic.

- Frank -


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 Post subject:
PostPosted: Fri Nov 02, 2007 5:35 pm 
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So are the pieces built up from scratch, including the core?

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3x3x3 . . . PB: 11.32 Avg: 17.33
4x4x4 . . . PB: 1:11.32 Avg: 1:27
5x5x5 . . . PB: 2:26.47 Avg: 2:36.04
Pyraminx . PB: 4.18 Avg: 8.43


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 Post subject:
PostPosted: Fri Nov 02, 2007 5:43 pm 
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sirajali05 wrote:
So are the pieces built up from scratch, including the core?


You do read the posts?

Thomas

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 Post subject:
PostPosted: Fri Nov 02, 2007 5:50 pm 
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Yeah all Lee says is they are modeled and molded. I guess that's the answer.....

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3x3x3 . . . PB: 11.32 Avg: 17.33
4x4x4 . . . PB: 1:11.32 Avg: 1:27
5x5x5 . . . PB: 2:26.47 Avg: 2:36.04
Pyraminx . PB: 4.18 Avg: 8.43


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 Post subject:
PostPosted: Sat Nov 03, 2007 5:17 am 
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Anyways, I have come up with a method for this puzzle, as trivial as it is.

Let's just call one of the side faces R, and the top face U.

Step 1: Middle Layer
-Intuitive

Step 2: Bottom Layer Edges
-U R U' R' if you're actually stuck.

Step 3: Top Layer Edges
-Huh? ;)

Step 4: Corners
-R U R U' R is a nice commutator.

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[02:25] <fusion> does look ahead on a 3x3 make someone faster?
[02:25] <Swordsman_Kirby> Yes.
[02:25] <fusion> maybe i should try that


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 Post subject:
PostPosted: Mon Nov 05, 2007 2:01 am 
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Lee,

I can only agree with Georges and Frank. If you have a buyers list at all, please add me to it also. The puzzle is really fantastic. Thank you.

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 Post subject:
PostPosted: Mon Nov 05, 2007 7:36 am 
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Swordsman Kirby wrote:
Anyways, I have come up with a method for this puzzle, as trivial as it is.

Let's just call one of the side faces R, and the top face U.

Step 1: Middle Layer
-Intuitive

Step 2: Bottom Layer Edges
-U R U' R' if you're actually stuck.

Step 3: Top Layer Edges
-Huh? ;)

Step 4: Corners
-R U R U' R is a nice commutator.


Can the sides do 90 degree turns? I was under the inpression that it was 180s only...

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 Post subject:
PostPosted: Mon Nov 05, 2007 8:26 am 
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I think that since the puzzle can only do 180 degree turns, R implies R2.


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 Post subject:
PostPosted: Mon Nov 05, 2007 5:29 pm 
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I would've thought so too, but then he started using R' as well :? or maybe that was just a typo...

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 Post subject:
PostPosted: Tue Nov 06, 2007 10:14 am 
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R' implies how I would actually make the turn. It makes more sense for me to do it counter-clockwise.

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[02:25] <fusion> does look ahead on a 3x3 make someone faster?
[02:25] <Swordsman_Kirby> Yes.
[02:25] <fusion> maybe i should try that


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