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 Post subject: Presenting the "Void String V2" and "Void String V3" cubes.
PostPosted: Sat Jan 25, 2014 5:58 pm 
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I would like to present my updates on Jon’s (GuitarSD’s) ingenious ‘Void String’ void cube modification.

The ‘Void String V2’

Attachment:
File comment: V2
V2.png
V2.png [ 475.92 KiB | Viewed 1245 times ]


and ‘Void String V3’.

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File comment: V3
V3.png
V3.png [ 462.98 KiB | Viewed 1245 times ]


Here is a photo of them together with the V3 on the left.

Attachment:
File comment: V3 & V2
V3 & V2 Together.jpg
V3 & V2 Together.jpg [ 1.5 MiB | Viewed 1245 times ]


Acknowledgments:
Katsuhiko Okamoto - Void String Mechanism
Jon (GuitarSD) - Void String “V1” Concept
Kelvin Stott - Shares credit for suggesting coloured strings.
Carolina Prendergast - Assisted with construction.
-

Puzzle Info:
o Inventor: James Prendergast
o Mechanism: Void mechanism
o Producer: Custom
o Year: 2014

Miscellaneous
o String Width: 0.8mm
o Sticker Make: Cubesmith


Last edited by Jumbo on Mon Jan 27, 2014 9:26 pm, edited 3 times in total.

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 Post subject: Re: Presenting the "Void String V2" and "Void String V3".
PostPosted: Sat Jan 25, 2014 6:03 pm 
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The history of this idea starts with Jon’s original modification which you can read about here.

http://twistypuzzles.com/forum/viewtopic.php?f=15&t=13524

Void String V2

I noticed KelvinS suggested to Jon “to use different colour strings!” which was an idea that had also struck me when I read Jon’s initial post. I contacted Jon and suggested extending that idea to include coloured strings connecting diagonally opposing edges of the cube, and to sticker those opposing edges to match the colours of the strings. The idea for the V2 was born and recently I found time to complete the project using some coloured elastics I found on E-Bay and some Reuben/3 Colour cube stickers I had left over. In the resulting puzzle all the strings cross in the center as you should be able to see in pictures posted above.

Attachment:
File comment: V2 Stickers
V2 Stickers.png
V2 Stickers.png [ 73.83 KiB | Viewed 1241 times ]


Void String V3

When I was finished I immediately wanted to make a second version where none of the strings crossed in the middle; but instead connect between opposing edges on the same side of the cube. I still had plenty of stickers left so only had to purchase a black void cube and wait for it to be delivered. I had originally intended to sticker the corners of V3 the same way as the V2, however while building it I realized that the puzzle looked very nice with black corners. In addition, since corners are now trivial and only the edge pieces require solving; it struck me that this is actually closer to the original Brainstring ‘R’ concept that prompted this mash up V3 mod in the first place.

Attachment:
File comment: V3 Stickers
V3 Stickers.png
V3 Stickers.png [ 49.92 KiB | Viewed 1241 times ]


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 Post subject: Re: Presenting the "Void String V2" and "Void String V3".
PostPosted: Sat Jan 25, 2014 6:21 pm 
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These are the the parts spread out.

Attachment:
File comment: Parts Spread Out
Parts Spread Out.jpg
Parts Spread Out.jpg [ 3.3 MiB | Viewed 1227 times ]


These are the lozenges you have to drill a hole through to insert and tie off the strings.

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File comment: Lozenge
Lozenge.png
Lozenge.png [ 796.84 KiB | Viewed 1227 times ]


This is where I tension-ed/set the length of the strings.

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File comment: Set String Tension
Set String Tension.jpg
Set String Tension.jpg [ 453.6 KiB | Viewed 1227 times ]


These are the lozenges all drilled and with strings fitted.

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File comment: Lozenges
Lozenges.png
Lozenges.png [ 4.66 MiB | Viewed 1227 times ]


Here is a close up (just after assembly) of the V2

Attachment:
File comment: Close Up V2
Close Up V2.png
Close Up V2.png [ 3.85 MiB | Viewed 1227 times ]


Here is a view of the V2 scrambled (only through two axis, not three).

Attachment:
File comment: Void StringV2 Scrambled
Void StringV2 Scrambled.jpg
Void StringV2 Scrambled.jpg [ 2.02 MiB | Viewed 1227 times ]


Here is a close up (just after assembly) of the V3

Attachment:
File comment: Close Up V3
Close Up V3.jpg
Close Up V3.jpg [ 1.25 MiB | Viewed 1227 times ]


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 Post subject: Re: Presenting the "Void String V2" and "Void String V3".
PostPosted: Sun Jan 26, 2014 10:29 am 
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Maybe someone can give me feedback on the following...

1). What should the proper names for these puzzles be, so here are the ideas I've considered so far.

For the V2 - ‘Crossover Void Cube’, since the strings all cross each others path when solved.
For the V3 - 'The Void Cube R', since it most resembles a Brainstring ‘R’ in the solved state.


2). Can anyone work out mathematically if there could be an algorithm that could
A) Cross the strings on a V3 so they are aligned like a V2.
and vice versa
B) Cross the strings on a V2 so they are aligned like a V3.


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 Post subject: Re: Presenting the "Void String V2" and "Void String V3".
PostPosted: Sun Jan 26, 2014 2:52 pm 
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Location: In my study drooling over my puzzle hoard - Precioussssss!
This looks amazing!

Beautifully made and very vibrant colours! I hate to think how tangled I'd would make it! If they get very tangled, is there enough give in the strings that they won't just snap?

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 Post subject: Re: Presenting the "Void String V2" and "Void String V3".
PostPosted: Sun Jan 26, 2014 6:47 pm 
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The reason I went for the thin strings is because they are VERY stretchy. Thicker strings may be visually easier to unknot in your mind, but they soon restrict the maximum number of moves possible before they become taught.


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 Post subject: Re: Presenting the "Void String V2" and "Void String V3" cub
PostPosted: Tue Jan 28, 2014 5:37 pm 
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Location: Canada
I see you decided to omit the stickers on the corner pieces in the V3. Do the strings make the corners unsolvable on the V2?


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 Post subject: Re: Presenting the "Void String V2" and "Void String V3" cub
PostPosted: Tue Jan 28, 2014 6:31 pm 
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Hi Colin, thanks for taking the time to comment on my forum post.

I don't think it would make it unsolvable or the V2 should be unsolvable. The V2 and V3 puzzles should be fully solvable with or without corner stickers AFAIK.

The interesting question I think would be:

1) Whether the presence of corner stickers forces you to have to exactly reverse the scramble to re-solve the cube with correctly orientated corners.
2) Without corners is it possible to unscramble the strings using a different sequence of moves than the sequence that scrambled them.

Regardless whether that is true or not (and I don't have the brain to do the math), I had two reasons for leaving them off:

1) I felt it made for a better looking puzzles,
b) It more closely and appropriately pays tribute to the original design of the Brainstring 'R' that inspired it.
i.e. The V3 puzzle is about the the unknotting of colored strings, not the solving of a cube.

Regards
James


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 Post subject: Re: Presenting the "Void String V2" and "Void String V3" cub
PostPosted: Tue Jan 28, 2014 7:19 pm 
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Better pictures of the sticker schemes on both puzzles (shown from front and back simultaneously using a mirror).

The V2 is on the left, the V3 is on the right.
(if you want to see close-ups of the strings on each puzzle, scroll to the top of this post)

Attachment:
File comment: Front and Back
20140128_235146.jpg
20140128_235146.jpg [ 1.56 MiB | Viewed 810 times ]


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 Post subject: Re: Presenting the "Void String V2" and "Void String V3" cub
PostPosted: Wed Jan 29, 2014 11:47 am 
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Joined: Sun Jan 19, 2014 9:23 pm
This puzzle reminds me of the BrainString R puzzle which is based off of the Skewb type puzzle.

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 Post subject: Re: Presenting the "Void String V2" and "Void String V3" cub
PostPosted: Wed Jan 29, 2014 7:55 pm 
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You are correct, I mention the Brainstring R in the posts above.

The Brainstring R mechanism is actually a copy of Oskars 'Minimal Twist' mech; which is a specific design of Skewb consisting only out of a dovetail mechanism and nothing else.


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