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 Post subject: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 2:16 am 
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Hi Twisty Puzzles fans,

Here is a new spherical core for Mefferts' Mosaic Cube, designed by me. Several people have noticed that the mechanism is a bit "spongy". The issues are illustrated by Roxanne Wong in this YouTube video.

The cause of this spongyness, and the resulting less-than-optimal turning, is the large cavity inside the puzzle into which the pieces are pushed. Twisty Puzzle Forum contributor Burgo suggested to fill the cavity with a spherical core. This new spherical core fills the cavity completely, making the puzzle more stable.

The result is very effective. Here is a quote from Tony Fisher by email.
Tony Fisher wrote:
After a very busy few days I finally had a chance to look at the core (thanks for the gift by the way).
I am certainly no expert at screw and spring tensions but the core seems to work really well. I noticed that when making a 'large' turn the expected 'small' turn did not always follow as it does on Meffert's factory prototype or mass produced versions. I don't see it as issue though.
In my opinion it works and is a huge improvement.
Watch the YouTube video.
Buy the core at my Shapeways Shop.
Read more at the Shapeways Forum.
Check out the photos below.

Enjoy!

Oskar
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Last edited by Oskar on Sat Apr 16, 2011 2:31 am, edited 1 time in total.

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 2:30 am 
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This is a good design! :lol:


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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 2:50 am 
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I've ordered the rerelease of the puzzle, so we shall see the quality of the newer version. If there are problems, I will buy this new core for certain.

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 3:51 am 
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when mosaic cube with this core will be available on mefferts?

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 9:49 am 
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Was the new core printed in WSF (nylon) material? Would Shapeways Grey Robust (ABS) be better for this application?

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 2:34 pm 
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Gus wrote:
Was the new core printed in WSF (nylon) material? Would Shapeways Grey Robust (ABS) be better for this application?
Yes, it looks like it was made in WSF. Why do you think Grey Robust would be better?

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 2:46 pm 
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It's just that I think that grey robust (ABS) is a more durable material to use as a core. After all, we are not interested in intricate curves or small details.

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 2:49 pm 
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Isn't the White Detail material ABS as well? Plus, it is more "detailed" than Black Strong and Flexible anyway.

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sat Apr 16, 2011 3:14 pm 
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A Grey Robust core would have many ridges on which the parts could catch, not a good idea I think. And durability is not really an issue, WSF itself is actually really tough and durable.
White Detail is not anything like ABS. It's far weaker and softer.

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- 3x4x5 Cuboid for just $34


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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sun Apr 17, 2011 1:46 pm 
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TomZ wrote:
A Grey Robust core would have many ridges on which the parts could catch, not a good idea I think.
Agreed. But nothing that a little sanding wouldn't solve.
TomZ wrote:
And durability is not really an issue, WSF itself is actually really tough and durable.
I was just thinking about the existing ABS parts rubbing against the nylon WSF, and wondered if the grey robust ABS would be better in the long term.

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sun Apr 17, 2011 7:56 pm 
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Great to see that it worked! Too bad Mefferts didn't pick this up.

However, I don't think the price is really justified. I pay $42 for a puzzle that almost doesn't turn, I shouldn't have to pay half of that price just to make it better.
I don't mean to undermine your work, but I think that at least this model should be sold without markup, as it's really kind of a 'damage control' for a defective puzzle...

again, no offense meant. Just feel that the price is a bit stiff...

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sun Apr 17, 2011 8:16 pm 
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Monopoly wrote:
I don't mean to undermine your work, but I think that at least this model should be sold without markup, as it's really kind of a 'damage control' for a defective puzzle...

again, no offense meant. Just feel that the price is a bit stiff...



I would bet that he doesn't even have any markup on it. If he does I doubt it is much. Cores cost more than you'd think. It is spherical without holes so it is smooth, it also has to be thick enough to be sturdy, as well as have enough material for the screws to hold on to. Some of the cores I have had to design cost even $40 without and mark up at all.


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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sun Apr 17, 2011 8:34 pm 
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Are you sure? Before it was a mere $11. Even if it's been redesigned, will the price nearly double because of it?

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sun Apr 17, 2011 8:49 pm 
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Monopoly wrote:
Are you sure? Before it was a mere $11. Even if it's been redesigned, will the price nearly double because of it?



It is possible, I think what was said that it was too small before? so increase in size, increase thickness, the more surface area the more it costs. I won't say he doesn't have mark up, he might. Even though the puzzle has problems it isn't Oskar's fault, and he did design a replacement core.


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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Sun Apr 17, 2011 10:33 pm 
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And, it's a product he's selling, much the same way that Uwe probably won't give out replacement Mosaic cubes to the people that bought version 1

(I don't mean to start anything by saying version 1, but I read somewhere he was going to MP a v2. I could be wrong; don't take my word for it)

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Tue Apr 19, 2011 6:11 pm 
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I ordered the core in BSF to match my black puzzle. If it prevents my puzzle exploding and maked it turn nicely, then that would be nice! The dying also raises the cost to $25.66, but except for 66 cents of that total, I'd of had to pay anyhow to meet the minimum order amount of $25.

*****UPDATE:

I should also mention that I recieved my ball core from Oskar's Shapeways shop,
http://www.shapeways.com/model/215635/m ... _core.html?
and I must say it does offer somewhat a considerable improvement. Obviously it's still no Guhong in terms of movement, but it does rotate much smoother that before, and more importantly, drastically cuts down the number of piece pops and puzzle explodes. I literally soaked the BSF core with silicone spray prior to reassembly, and that thing can soak up huge amounts of lube!!!

So is it worth the USD $25 investment? I can't answer that question for you, but it definitely helps. If you're happy with it as is, or you want to try an alternative remedy mentioned in the other thread, that is fine too.

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Tue Jun 14, 2011 5:44 am 
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I purchased the new core from oskars shapeways shop. and i have to say ... it is a HUGE improvement ..

not only does the puzzle feel more stable, it turns alot better and it acctually keeps its cubic form better as well.

to be honest it gave me a reason to play with the puzzle again. ( i really hated the old core at first).

and its acctually quite easy to assemble. (apart from trying to remove the pieces from the old core .. which seem to be superglued .. i had to break 2 of them off and re glue them ).


i highly recommend this core for any mosaic cube fans out there. it really makes a difference. :D


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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Tue Jun 14, 2011 2:28 pm 
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EMPEROR_COW wrote:
...i highly recommend this core for any mosaic cube fans out there. it really makes a difference. :D
You may have a look at other posts about the ball core here. I have not seen any contradicting opinions :)

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 Post subject: Re: Sphere core for Mosaic Cube by OSKAR
PostPosted: Tue Jun 14, 2011 2:41 pm 
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EMPEROR_COW wrote:
i highly recommend this core for any mosaic cube fans out there. it really makes a difference. :D

My Mosaic Cube with its original core works well enough.... That said I would be willing to give the Sphere Core a try if I didn't have to risk breaking something to get the caps off my corners.

Any chance Mefferts would consider selling a Mosaic Cube as a kit, nothing glued or stickered yet? If he did I'd buy one and give the Sphere Core a try.

Carl

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