Shim's Face Turning Master Octahedron

Timur · **Posted:** Sat Jun 19, 2010 2:39 am

Hi! I made a 4th-order Face Turning Octahedron. It can also be called Master Skewb Diamond.

YouTube video:
http://www.youtube.com/watch?v=EOpp8xKIsvY

This was my very first casting experience and I did some mistakes while molding and casting, so the turning is kind of tight and squeaky. Nevertheless, the design is working and I'm going to try again.

Hugo Mak · **Posted:** Sat Jun 19, 2010 3:03 am

Great one!
I wonder how you made the mech, 'cause I always draw this on a piece of paper when I'm bored (aka. scribbling)

grigr · **Joined:** Mon Jun 30, 2008 8:38 pm **Location:** Russia

God Job Timur

olz · **Posted:** Sat Jun 19, 2010 5:14 am

I've tried and failed to design this puzzle a few times before.

Congratulation on sucseding

Jared · **Posted:** Sat Jun 19, 2010 11:43 am

How did you get the corners to stay in during a turn? Is it similar to the Master Pyraminx?

Very nice! I've been wondering how long it would take to make this one.

yummyyummypbj · **Joined:** Mon Nov 16, 2009 10:50 am

it should actually be called the face turning skewb octahedron.

theVDude · **Posted:** Sat Jun 19, 2010 12:33 pm

Timur wrote:

I made a 4th-order Face Turning Octahedron. It can also be called Master Skewb Diamond.

He's got that covered. I love this! Don't even have an FTO, but it was a puzzle I had been designing. Should probably get one.

Timur · **Posted:** Sat Jun 19, 2010 1:27 pm

Jared wrote:

How did you get the corners to stay in during a turn? Is it similar to the Master Pyraminx?

Similarly to the Master Pyraminx, the corners are holding all other pieces.

merlintocs · **Posted:** Sat Jun 19, 2010 10:46 pm

Excellent, Timur!

Luke · **Posted:** Sun Jun 20, 2010 11:01 am

That looks great! Hopefully in the future I'll be able to get one.

DLitwin · **Posted:** Tue Jun 22, 2010 2:49 am

Beautiful puzzle!

From the pictures tt looks like your pieces are offset a bit when molded. This can happen if you don't make enough registration pins around pieces or if you let the first half harden too much before turning it over to the second half (using Drewseph's method). I have been having that problem myself lately. You almost always get a tiny bit of drift (0.2mm or so) but when it is .5mm to 1mm it is a big problem.

The best you can do is then scrape or sand each piece to minimize this defect. If you don't , it won't turn well.

Another thing to consider is letting the resin cure longer before assembling and turning. Resin recently poured can be a bit tacky (depending on your mix ratio) and it hardens up over time.

Finally: Silicone! It makes all the difference in the world.

Dave

drew11 · **Posted:** Wed Jun 23, 2010 7:45 pm

Do you have any plans for selling this on your shapeways page?

Timur · **Posted:** Thu Jun 24, 2010 12:56 pm

drew11 wrote:

Do you have any plans for selling this on your shapeways page?

Not now - actually some minute mechanism adjustments should be made at first, but I can not test it due to high price of full 3D printing at Shapeways. And I do not want to put it for sale before I'm sure that it works fine.

Shim's Face Turning Master Octahedron

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