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

TwistyPuzzles.com Forum

It is currently Sat Apr 19, 2014 3:01 pm

All times are UTC - 5 hours



Post new topic Reply to topic  [ 11 posts ] 
Author Message
 Post subject: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 5:02 pm 
Offline
User avatar

Joined: Mon Nov 16, 2009 10:50 am
If I were to scale up a twisty puzzle using the scale feature in solidworks, would it still function the same?

_________________
"If I have been able to see further, it was only because I stood on the shoulders of giants" Isaac Newton


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 5:22 pm 
Offline
User avatar

Joined: Sun Dec 13, 2009 5:48 pm
I would assume not, because of the tolerance of the puzzle before you scaled it. That's just my opinion, I'm sure it could be incorrect though.

_________________
I should probably find a better signature....


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 5:46 pm 
Offline
User avatar

Joined: Thu Dec 31, 2009 8:54 pm
Location: Bay Area, California
Certain things aren't based on the size of the piece. Screw hole sizes, tolerances between surfaces, fillets, shelling thickness, etc.

Even the tongue/groove between pieces is generally designed to be a specific size (2mm thick for example) regardless of the piece size.

I think the only thing that would prevent the puzzle from functioning though is just the tolerances. They don't scale linearly.

_________________
Prior to using my real name I posted under the account named bmenrigh.


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 6:23 pm 
Offline
User avatar

Joined: Thu Sep 16, 2010 4:35 am
It should work as long as you haven't added tolerances or screwholes yet.

_________________
Image


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 6:39 pm 
Offline
User avatar

Joined: Mon Mar 30, 2009 5:13 pm
I agree with the above regarding tolerences in principle, but in practice I don't think it will be a problem if you're scaling dimensions by less than 2-fold (since tolerences vary 10-fold from about 0.05 to 0.5mm anyway), as long as you can find screws/fittings scaled in proportion.

_________________
If you want something you’ve never had, you’ve got to do something you’ve never done - Thomas Jefferson


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 6:41 pm 
Offline
User avatar

Joined: Thu Dec 31, 2009 8:54 pm
Location: Bay Area, California
KelvinS wrote:
I agree with the above regarding tolerences in principle, but in practice I don't think it will be a problem if you're scaling dimensions by less than 2-fold (since tolerences vary 10-fold from about 0.05 to 0.5mm anyway), as long as you can find screws/fittings scaled in proportion.

There is another reason you don't want to scale a finished puzzle: cost.

If you double the size of a puzzle the cost goes up 8x. If you scale before shelling pieces you can get the cost increase down to as low as 4x.

_________________
Prior to using my real name I posted under the account named bmenrigh.


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 6:57 pm 
Offline
User avatar

Joined: Mon Mar 30, 2009 5:13 pm
bmenrigh wrote:
There is another reason you don't want to scale a finished puzzle: cost.

If you double the size of a puzzle the cost goes up 8x. If you scale before shelling pieces you can get the cost increase down to as low as 4x.

That's true, but cost will always go up as you scale up, so I guess that was expected, and it wasn't part of the original question which focused on functionality.

Otherwise I agree, shelling after scale-up will avoid costs going up linearly with volume, provided the walls do not become too thin and flexible (more of a problem with larger puzzles).

_________________
If you want something you’ve never had, you’ve got to do something you’ve never done - Thomas Jefferson


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 7:01 pm 
Offline
User avatar

Joined: Mon Nov 16, 2009 10:50 am
I guess we're about to find out because I'm waiting for some twisty puzzles that I happened to scale up. I hope for the best.

_________________
"If I have been able to see further, it was only because I stood on the shoulders of giants" Isaac Newton


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 7:02 pm 
Offline
User avatar

Joined: Mon Mar 30, 2009 5:13 pm
yummyyummypbj wrote:
I guess we're about to find out because I'm waiting for some twisty puzzles that I happened to scale up. I hope for the best.

By what factor did you scale each dimension?

_________________
If you want something you’ve never had, you’ve got to do something you’ve never done - Thomas Jefferson


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 9:45 pm 
Offline
User avatar

Joined: Mon Nov 16, 2009 10:50 am
KelvinS wrote:
yummyyummypbj wrote:
I guess we're about to find out because I'm waiting for some twisty puzzles that I happened to scale up. I hope for the best.

By what factor did you scale each dimension?


I scaled it all up but 1.5 before shelling.

_________________
"If I have been able to see further, it was only because I stood on the shoulders of giants" Isaac Newton


Top
 Profile  
 
 Post subject: Re: Scaling Puzzles
PostPosted: Sun Nov 25, 2012 9:52 pm 
Offline
User avatar

Joined: Mon Mar 30, 2009 5:13 pm
yummyyummypbj wrote:
I scaled it all up but 1.5 before shelling.
Then I'm pretty sure you won't have any problems at all. In fact it may even work slightly better than the original, on the basis that any small overhangs will be larger and less likely to pop out given the same amount of force, as long as you've kept the walls thick enough. Also, the "signal to noise" ratio (functional design dimensions vs print resolution) will improve with scale.

Let us know how it works out.

_________________
If you want something you’ve never had, you’ve got to do something you’ve never done - Thomas Jefferson


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: Fireman and 3 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