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

TwistyPuzzles.com Forum

It is currently Mon Apr 21, 2014 5:34 am

All times are UTC - 5 hours



Post new topic Reply to topic  [ 11 posts ] 
Author Message
 Post subject: Help for a mechanism
PostPosted: Tue Aug 30, 2011 1:30 pm 
Offline
User avatar

Joined: Tue Mar 22, 2011 1:26 pm
Location: Québec, Canada
It's been several hours that I try to design a puzzle in solidworks, and after several failures, I decided to ask for some help.
At the same time I think that it is a challenge because I think that this type of cuts doesn't exist, and I'm begining to think that it is impossible.

So the mech is a mix of a 4 axis core and 2x2 cuts(6 axis). (I'll keep secret the puzzle)
The problem is that with the 2x2 moves, the 4 axis misalign and bandage those moves.
Sure, I liked to create it myself, so that it's my own creation, but I dont think I have the knowledge and the experience to do it.

Additional info:
As everybody know, a 4-axis puzzle has 8 turning cuts, but only 4 are attached to the core to allow turning.
Also, the 8 cuts are not all the same, ex: in a skewb, the corners are not all the same, some cuts are inward and other outward.
But for allowing the 2x2 moves, the pieces need to be all the same or it will bandage. So i used 8 same cuts,but it can no longer be attached to the core.
To fix that, I used an extra layer. For now, my 2x2 cuts are just plain cuts.

The mechanism must be small ,because it is in a tetrahedron (hint).

So the aim of this topic is to help me better understand complex shell mechanism and ultimately find a core that enable 2x2 and 4 axis (skewb like) moves.

I will post later some of my prototype to give you lead or for inspiration. Thank you.

_________________
My Shapeways shop


Top
 Profile  
 
 Post subject: Re: Help for a mechanism
PostPosted: Tue Aug 30, 2011 1:39 pm 
Offline
User avatar

Joined: Fri Feb 08, 2008 1:47 am
Location: near Utrecht, Netherlands
I think it's not much use being this vague... There are not many puzzles you could be making. In any case, it's hard to help without knowing the exact puzzle.

The only way to do it would be to get rid of the idea of using a 4-axis core and treat it as a 8-axis puzzle. Have a look at the mechanism of the FTO.

_________________
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: Help for a mechanism
PostPosted: Tue Aug 30, 2011 1:53 pm 
Offline
User avatar

Joined: Sun May 17, 2009 1:33 pm
Location: USA, North America, Planet Earth, Solar system, Milky Way galaxy, Universe
Sounds like you're either trying to make tetrahedral skewb + 222, or master skewb + 222.
if the second, use a split 8 axis core, like Tom said.
If the first, you can technically bandage the above 8 armed core puzzle in to a deep cut version, but try building instead the six axis core on top of the four axis core.

_________________
-sj

NEW VIDEOS-
3x3x3 stop-motion solve
Meffert's new Pyraminx Crystal solve
QJ 4x4x4 solve


Top
 Profile  
 
 Post subject: Re: Help for a mechanism
PostPosted: Tue Aug 30, 2011 2:55 pm 
Offline
User avatar

Joined: Tue Mar 22, 2011 1:26 pm
Location: Québec, Canada
If knowing what is the puzzle will help you to help me (weird phrase :P), here it is:

a rex tetrahedron + 2x2, that will allow jumbling + massive shapeshifting

_________________
My Shapeways shop


Top
 Profile  
 
 Post subject: Re: Help for a mechanism
PostPosted: Tue Aug 30, 2011 3:18 pm 
Offline
User avatar

Joined: Fri Feb 08, 2008 1:47 am
Location: near Utrecht, Netherlands
Well, the most logical way to make it would be to build it up from a Dino Cube but this approach has proven problematic with Jason/Adam's Skewb 2x2x2. You could also treat it as a corner turning rhombic dodecahedron and do a "normal" shells buildup.
I'm not sure how it would jumble though.

_________________
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: Help for a mechanism
PostPosted: Tue Aug 30, 2011 4:18 pm 
Offline
User avatar

Joined: Tue Mar 22, 2011 1:26 pm
Location: Québec, Canada
First, what I mean by jumbling is that on a regular rex cube these pieces cannot be exchanged:
Image
I dont have a rex cube, so it may be false.

Secondly, simply a rex tetrahedron was my first idea, but as I discovered that it doesn't jumble, it wont shapeshift either(in tetrahedron shape)

Thirdly, I found a solution and it wasn't hard. In fact, pretty easy. The problem was that my cuts weren't very good and because of that, the hidden corners that are usually attached to the core were deleted. So I just changed the cuts orientation (inward-outward) and those pieces reappeared.
After that, I figured that one turn doesn't move the other corner, so I just need to build a 8 arm spider over a 2x2.

Finally, this topic is just a waste of time and I have revealed my puzzle idea :lol:

_________________
My Shapeways shop


Top
 Profile  
 
 Post subject: Re: Help for a mechanism
PostPosted: Tue Aug 30, 2011 4:27 pm 
Offline
User avatar

Joined: Fri Feb 08, 2008 1:47 am
Location: near Utrecht, Netherlands
Well, I'm glad you got it to work after realizing that an 8 axis-core would work better. Though I'm not sure if those corners are indeed stationary.

In any case, that is not jumbling. It's just changing the orbits (or something!). Though it would still change shape if you got the mechanism right, I think.

_________________
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: Help for a mechanism
PostPosted: Tue Aug 30, 2011 4:31 pm 
Offline
User avatar

Joined: Thu Oct 16, 2008 9:46 pm
Location: Littleton CO
I could be way wrong here. But don’t pieces need jumbling for pieces to leave their orbits?


Top
 Profile  
 
 Post subject: Re: Help for a mechanism
PostPosted: Tue Aug 30, 2011 4:33 pm 
Offline
User avatar

Joined: Thu Sep 24, 2009 12:21 pm
Location: Chichester, England
Nope. The hybrid of another puzzle can allow orbits to be changed.

_________________
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: Help for a mechanism
PostPosted: Tue Aug 30, 2011 5:22 pm 
Offline
User avatar

Joined: Tue Mar 22, 2011 1:26 pm
Location: Québec, Canada
TomZ wrote:
Though it would still change shape if you got the mechanism right, I think.

I don't know if your talking about just a rex tetrahedron or with the 2x2 cuts, but for the first case, no it won't change shape:
Image

But for the second case, YES! it shapeshift. First, 2x2 cuts on tetrahedron = pyramorphinx (or "phix"). And secondly, with the change of orbit, the center triangle and the corner-edge can switch.

Note: the image is not the rex+2x2

_________________
My Shapeways shop


Top
 Profile  
 
 Post subject: Re: Help for a mechanism
PostPosted: Thu Sep 01, 2011 4:34 pm 
Offline
User avatar

Joined: Mon Oct 06, 2008 9:42 pm
Location: A Coruña - Spain
We seem to have very similar ideas ... :)


Attachments:
Tetra.jpg
Tetra.jpg [ 101.07 KiB | Viewed 1069 times ]

_________________
Image Image Image Image Image
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 11 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 5 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