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It is 2" in size.

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That is really, really cool. I also like the 'demo samples' the rapid prototyping guys have on their stands at exhibitions. Spheres within cubes within ellipsoids etc....

JB

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That's cute. Surely you can get out your tiny end mills and work it down a few more levels...

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I saw some cool examples too.

The code to do it, is actually a recursive G code function (which is understandable, since the shapes are recursively nested).

(Makes a turner's cube. See projects.txt for formulas).

O sub # = #1 (X Center) # = #2 (Y Center) # = #3 (Current Z) # = #4 (Side) # = #5 (Mill Diameter) # = #6 # = #7

# = [# * #/2]

O if [ # gt #] G0 X# Y# O call [# + 0.01] # = [ [#/2 - #] + #*#*[1 - 1/sqrt[ 2 ]]]

O call [#] [#] [# + 0.01] [# - #] [#] [#]

# = [# - 2*#]

O call [#] [#] [# - #] [#] [#] [#] [#] O endif

G0 X# Y# O call [# + 0.01] O endsub

M2

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That's possible, but would add to the time expense. I was thinking, to try selling this stuff on ebay.

My work involved here, is to open the vise six times and flip the cubes in the vise.

i
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>

Dude, you have a 4th axis, only two vise changes required. Load part and machine sides 1-4, stop, flip part and machine sides 5 and 6.

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It would also greatly add to the fixturing precision that is required.

i

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> >

Add to that, probably use custom soft jaws in the small vice on the 4th axis in order to properly locate the part. Also probably machine in AL, polish in a tumbler and anodize for sale.

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I think that clamping this is to rotary table do difficult, that flipping the part over 6 times is easier.

If I wanted to make quantities, I would machine three cubes at a time, setting three in a row in a vise.

i
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> > >

Oh, yes, I realize that I have a question. How can I make this cube beautiful, as in, remove manufacturers marks on the aluminum,. etc?

Tumbling? In what?

i
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FWIW, three is a vice is asking for trouble. One will be loose. Four in a vice - OK. multiple vices - OK.

Karl

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I'm going to guess w/o reading the rest of the thread first, you did it on your mill?

You are having way too much fun :)

Wes

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>> > >

I'd look at the large vibratory polisher / tumbler that HF sells (on sale now). It looks like it should be large enough to handle 2" cubes.

I have the smaller version that I picked up for cleaning / polishing brass for reloading, but I haven't got around to using it yet. It looks decent enough at any rate.

They also carry some assorted media for the tumblers, and of course you can get media from a lot of other places as well.

Polishing is the first step of course, after that you need some sort of finish to protect from rust or oxidation. There are a lot of options depending on what material you are making the parts from, look at the Caswell site for various ideas.

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>> >

Clamping on the RT shouldn't be that difficult really.

If you want production, clearly you'll need to make a custom fixture to hold six or eight cubes, with air over hydraulic clamping, and a parts handling robot to flip the cubes around for you while you watch on the webcam from your office :)

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Ignoramus4120 fired this volley in news:goqdnZfk9pS3exnQnZ2dnUVZ snipped-for-privacy@giganews.com:

Ig, it's pretty, as far as you went. But why didn't you complete it?

LLoyd

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Bead blasting will give it a matte finish.

Hope This Helps! Rich

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