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 Post subject: Re: Minimis 2x2x1 - My new mechanism
PostPosted: Sat May 29, 2010 2:37 pm 
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Joined: Fri Feb 08, 2008 1:47 am
Location: near Utrecht, Netherlands
Wouldn't we all be happier if Meffert focussed on making puzzles? :lol:

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 Post subject: Re: Minimis 2x2x1 - My new mechanism
PostPosted: Sun Jun 13, 2010 2:47 pm 
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Joined: Sun Mar 11, 2007 3:11 am
Location: Oregon, USA
I keep experimenting with the 2x2x1 because it's a perfect mechanism for testing new ideas: it uses a minimum of material, it doesn't require extra hardware, and I can build test models quickly.

TomZ wrote:
By the way, I just assembled my copy of your 2x2x1 and it works quite nicely. Snapping it together was scary but it works really well.
I ordered the hollow version, and I've got some feedback on that: The open faces detract from the final puzzle. I could have ordered the solid version, but ordering anything that is not hollowed out is against my principles as I don't like wasting money.
I think you should make a version where the faces are closed, but the puzzle is hollow. Shapeways doesn't mind if you do that and you can get a really good price. If I were you, I'd take the solid version and apply the shell command (at least, if you software can do that) to shell it out to 1mm (or less, I think that can be done with this puzzle) while not having any open faces.


Semi-solid version
I updated the solid model as you suggested and uploaded it to Shapeways. I cut away the interior as shown, but the exterior is solid so it doesn't have the opening to which TomZ objected. This means the support material will be entrapped within the shell, but it will build faster and cost less. Here's a cutaway of the STL showing the hollow interiors:
Attachment:
File comment: Cutaway of semi-solid puzzle showing hollow interiors
Solid_cutaway.png
Solid_cutaway.png [ 32.75 KiB | Viewed 536 times ]


It's not quite as stable as the original solid model, probably because the center doesn't provide as much protection against distortion, but it's a bit more stable than the hollow version. The pieces don't "fly around" but they certainly turn freely.


Ghostly sphere version
When I built the solid version on my 3D printer I thought the clear center looked a little unbalanced because 3 pieces have internal mechanisms and 1 doesn't. So I added a hollow spherical shell inside all 4 pieces, which appears as a ghostly sphere inside the solid material. The mechanisms are still visible but the ghostly sphere wraps around them in a very cool way.


Recessed tiles version
And to make it even easier to finish each puzzle I added recessed areas on the sides so I can just snap tiles into the puzzle, which is easier than applying stickers. I made the tiles a few weeks ago by building clear, flat shapes and then painting the back sides. (The front is clear & shiny, so the color shines through.)


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 Post subject: Re: Minimis 2x2x1 - My new mechanism
PostPosted: Sun Jun 13, 2010 2:56 pm 
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Joined: Thu Sep 24, 2009 12:21 pm
Location: Chichester, England
That new version seems to be a lot better then. When I buy one of them I'll make sure I'll get that one then.

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 Post subject: Re: Minimis 2x2x1 - My new mechanism
PostPosted: Sun Jun 13, 2010 3:13 pm 
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Joined: Thu Sep 17, 2009 6:07 am
Location: Germany, Bavaria
SEBUVER wrote:
That new version seems to be a lot better then. When I buy one of them I'll make sure I'll get that one then.
Yeah, but the real great show would be, if we could get that ghostly transparent version.
Really nice :) I have got the black version, but transparency would show the minimalistic mechanism, really.

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 Post subject: Re: Minimis 2x2x1 - My new mechanism
PostPosted: Sun Jun 13, 2010 3:53 pm 
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Joined: Sun Mar 11, 2007 3:11 am
Location: Oregon, USA
konsassen wrote:
SEBUVER wrote:
That new version seems to be a lot better then. When I buy one of them I'll make sure I'll get that one then.
Yeah, but the real great show would be, if we could get that ghostly transparent version.
Really nice :) I have got the black version, but transparency would show the minimalistic mechanism, really.

That's a good point. The opaque puzzle isn't very interesting after it's assembled, since a 2x2x1 is rather dull as a puzzle.

I'm testing a layout that should allow me to build the transparent solid models easily and cheaply, complete with the ghostly sphere effect. If it turns out to be practical, I'll put a fixed-price batch on eBay.

The transparent hollow version I showed earlier was attractive, but totally impractical to produce. To get the support material out of the hollow centers I had to pull it out through the side openings, one layer-at-a-time, using tweezers. The models are 114 layers thick, so it takes over 2 hours to remove the supports on the hollow ones.


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