Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

TwistyPuzzles.com Forum

It is currently Fri Apr 18, 2014 7:38 am

All times are UTC - 5 hours



Post new topic Reply to topic  [ 22 posts ] 
Author Message
 Post subject: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 1:12 am 
Offline
User avatar

Joined: Wed Aug 01, 2007 3:14 pm
Location: Orange County, CA
Heres a good story. This puzzle has been in the works for over 2 years :lol: !

Anyways, I came up with this mechanism idea over 2 years ago at a summer competition. I was having trouble solving my much larger 2x3x4, and so were several other people, until someone suggested that the puzzle was basically an extended 2x2x3. Soon afterwards, I commissioned Scott Bedard to help out with the CAD work for such a design (FF extended 2x2x3) but, with the molding and casting techniques of the time, it was decided that it would be difficult to make a stable version. Thus, the project was dropped.

Fast forward 2 years and a few months. Steryne posts a topic about the $50 competition, and I think, well, this would be an excellent time to try out this design using modern 3d printing. As simple as this mechanism is, it is still pushing the limits of what is possible with the WSF material from Shapeways due to the price restrictions of the contest. It ended up working well, and I am very happy with the results.

Video Here

Competition Demo

The turning took quite a while to dial in. Right off the bat, I realized I had purchased 1/2" screws instead of 3/8" screws so I figured I would clip them down by a few threads. Bad idea; the sharp point made by the clippers stripped out the core. I at least got the puzzle together long enough to figure that it would function well. Day 2 I had to drill out the core and centers to fit bigger screws, and got the right length, so the core wouldn't strip. I also cut some parts down so that a few of the screws are easier to access (future design revision). Once all that was done, assembly was fairly straightforward.

I will post pictures soon.


My puzzle entry was going to be a MUCH nastier version of this puzzle...unfortunately i couldn't figure out the mechanism at this scale. Maybe another time...

_________________
-Garrett


Last edited by Garrett on Sun Aug 15, 2010 1:49 pm, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 1:40 am 
Offline
User avatar

Joined: Sun Jun 13, 2010 1:00 am
Location: Colorado
Looks great :D

_________________
My Shapeways Shop
My YouTube Videos
My Museum Puzzles


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 2:34 am 
Offline
User avatar

Joined: Thu Sep 24, 2009 12:21 pm
Location: Chichester, England
Very nice!

_________________
3x3x3 single: 5.73 seconds.
3x3x3 average of five: 8.92 seconds.
3x3x3 average of twelve: 9.77 seconds.

Buy the Curvy Copter Skewb, NovaMinx, and more here!


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 2:37 am 
Offline
User avatar

Joined: Wed Aug 01, 2007 3:14 pm
Location: Orange County, CA
Thanks guys!

Also, the Shapeways file is being updated to it's final version with the screw access holes added for easier assembly. I also slightly reduced the tolerances on the outer extensions, the one in this test print are slightly looser than I would like.

_________________
-Garrett


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 5:29 am 
Offline
User avatar

Joined: Mon Aug 27, 2007 3:50 pm
Location: Copenhagen, Denmark
Hurray for Garrett!! I love this puzzle, and finally its available. And in this size. and so cheap! Hurray! :lol:

_________________
Tony Fisher wrote:
I believe it would work best with black plastic.

My puzzles in the Museum
My Website
My Youtube Channel


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 5:43 am 
Offline
User avatar

Joined: Sat Jul 11, 2009 1:09 pm
Location: My House
This is a good puzzle, but unfortunately it is not eligible for the contest if (as you said in your first post) it is printed in WSF. :?

Attachment:
2x3x4 price.jpg
2x3x4 price.jpg [ 4.81 KiB | Viewed 3571 times ]

Alex

_________________
If I had £1,000,000 more, I'd be a Millionaire

YouTube Account: Cubiksrube113


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 6:15 am 
Offline
User avatar

Joined: Fri Feb 08, 2008 1:47 am
Location: near Utrecht, Netherlands
There's this tax called VAT... I think the price limit for the reduction is $50 ex VAT, because otherwise just about everybody would be disqualified.

_________________
Tom's Shapeways Puzzle Shop - your order from my shop includes free stickers!
Tom's Puzzle Website


Buy my mass produced puzzles at Mefferts:
- 4x4x6 Cuboid for just $38
- Curvy Copter for just $18
- 3x4x5 Cuboid for just $34


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 7:51 am 
Offline
User avatar

Joined: Sat Jul 11, 2009 1:09 pm
Location: My House
TomZ wrote:
There's this tax called VAT... I think the price limit for the reduction is $50 ex VAT, because otherwise just about everybody would be disqualified.

Attachment:
2x3x4 price vat.jpg
2x3x4 price vat.jpg [ 5.29 KiB | Viewed 3538 times ]

Alex

_________________
If I had £1,000,000 more, I'd be a Millionaire

YouTube Account: Cubiksrube113


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 8:02 am 
Offline
User avatar

Joined: Fri Feb 08, 2008 1:47 am
Location: near Utrecht, Netherlands
Whoops, sorry for giving you my default answer. However, Garret's puzzle pricing is still within the limits of the competition:

Quote:
2. The puzzle itself must cost $50 usd or less to be printed.
3. The puzzle must be open to the general public with a maximum mark-up cost of $10.


I've reverse engineered Garret's pricing and his model does stay within the $50+$10 limit.

_________________
Tom's Shapeways Puzzle Shop - your order from my shop includes free stickers!
Tom's Puzzle Website


Buy my mass produced puzzles at Mefferts:
- 4x4x6 Cuboid for just $38
- Curvy Copter for just $18
- 3x4x5 Cuboid for just $34


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 1:48 pm 
Offline
User avatar

Joined: Wed Aug 01, 2007 3:14 pm
Location: Orange County, CA
Correct, the price was just a few cents under the $50 maximum. Since I made those modifications, some material was removed an now its a tad cheaper.

Thanks for all the positive feedback!

_________________
-Garrett


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 2:53 pm 
Offline
User avatar

Joined: Fri Nov 04, 2005 12:31 am
Location: Greece, Australia, Thailand, India, Singapore.
Hey... I just watched the video. It turns nicely, well done!
You have surely gone a long way and are now making some lovely masterpieces!

:)


Pantazis

_________________

Educational R&D, Gravity, 4D Symmetry, Puzzle Ninja, Matrix Mech, Alien Technology.


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 4:12 pm 
Offline
User avatar

Joined: Fri Mar 06, 2009 9:23 pm
this looks like a wonderful puzzle! I can't wait to own one.

_________________
--Eric Vergo

My Shapeways shop


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 5:49 pm 
Offline
User avatar

Joined: Mon Aug 27, 2007 3:50 pm
Location: Copenhagen, Denmark
me neither, I couldnt resist and went ahead and ordered a completed one directly from Garrett! :lol:

_________________
Tony Fisher wrote:
I believe it would work best with black plastic.

My puzzles in the Museum
My Website
My Youtube Channel


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sun Aug 15, 2010 8:54 pm 
Offline
User avatar

Joined: Fri Dec 23, 2005 1:45 pm
Location: St. Louis, Missouri
Oh, wow. I really want one of these. I believe I'll start doing a little saving...


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sat Feb 12, 2011 7:40 pm 
Offline
User avatar

Joined: Fri Dec 08, 2000 2:32 am
Location: San Francisco, CA
Sorry about the bump...

Garrett - are you still selling these? I've attempted to PM and email with no response.

(I'd simply order from Shapeways but I need details about the screws, and would love to interact with the designer directly!)


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sat Feb 12, 2011 8:36 pm 
Offline
User avatar

Joined: Wed Aug 01, 2007 3:14 pm
Location: Orange County, CA
Hey Joshua, I'm no longer selling assembled 2x3x4s but you can still buy them from my shop.

For screws you will need #4-40 3/8" Flat Undercut machine screws. (Part number 91099A165 at McMaster

_________________
-Garrett


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Sat Feb 12, 2011 8:37 pm 
Offline
User avatar

Joined: Fri Dec 08, 2000 2:32 am
Location: San Francisco, CA
Thanks for the update, Garrett - off to Shapeways I go!


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Tue Mar 01, 2011 12:14 am 
Offline
User avatar

Joined: Fri Dec 08, 2000 2:32 am
Location: San Francisco, CA
Hey Garrett:

I received an anticipated package from Shapeways - the 2x3x4 parts. Very elegant design. However, unless I'm completely misunderstanding the puzzle and/or have slipped into an alternate dimension, something is awry with the corner pieces:

Image

Note that all 8 of the corners have the same foot orientation. So far as I can tell, there should be 4 of each orientation ("left" and "right")

Is this a problem with the STL files on Shapeways? Did you update them recently? Did Shapeways somehow manage to mix up parts from two orders? Did a visitor from a higher dimension flip them over?

Or am I hallucinating? (If so, please slap some sense into me.)

But assuming I'm not going crazy...

Could you possibly upload a "replacement set" to Shapeways with just the 4 "other" oriented corners so that I can order the parts I need?


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Tue Mar 01, 2011 1:06 am 
Offline
User avatar

Joined: Wed Aug 01, 2007 3:14 pm
Location: Orange County, CA
Something is definitely awry there. There should be 2 sets of 4 corners which are mirrors of each other. The STL has not been updated since the original file was uploaded, so this is a problem on the Shapeways side. I would send them an email, their customer service is very helpful.

_________________
-Garrett


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Tue Mar 01, 2011 1:44 am 
Offline
User avatar

Joined: Fri Dec 08, 2000 2:32 am
Location: San Francisco, CA
Thanks for confirming that I'm not crazy. I've sent mail off to Shapeways, let's see what happens.


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Fri Mar 04, 2011 1:26 pm 
Offline
User avatar

Joined: Fri Dec 08, 2000 2:32 am
Location: San Francisco, CA
Still waiting for Shapeways to get back to me with a solution (they acknowledged the email, and have sent the issue to their suppliers...)

Garrett, one more question: what approach do you use to keep the central mechanism aligned with the "2x2x3" core? Do I need to glue 4 pieces together as in http://twistypuzzles.com/articles/building-tonyfisher/ or is there something more subtle that I'm missing?

Sorry to be a pest!


Top
 Profile  
 
 Post subject: Re: 2x3x4 (Contest entry)
PostPosted: Tue Mar 08, 2011 4:41 pm 
Offline
User avatar

Joined: Wed Aug 01, 2007 3:14 pm
Location: Orange County, CA
hey Joshua,

Send me an email at garrettspuzzles(at)gmail(dot)com and I will send you a render of the parts that need to be glued.

I'm working on a second version now that will be ready-to-assemble out of the box and won't require any gluing.

_________________
-Garrett


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 22 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: Google Adsense [Bot], JackRTully, traiphum and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

Forum powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group