Not a Benchtop mill but Dang! You have to see this build.

[praetor]

http://www.cnc.info.pl/topics60/frez...c2dfd11b2a5c44

Geez, how is it that some of you guys have the time and resources to accomplish such a feat...possibly while On the Job, I'd get fired for attempting this...lol

[Mogal]

uhm, I suspect there was a little number cruching when making that gear cluster!!

[SpeedsCustom]

Thats freaking awesome!

-Jason

[sergizmo]

Uh, wow. Amazing work. That is the biggest build I've ever seen. And the parts he was making with it...

What language is this, Polish? I wish I could read it.

Serge

[cadmonkey]

I was too lazy to do babelfish or anything so I just enjoyed being a kid and looking at the pictures

edit - if it is polish I might need to print the whole thing off and have my grandmother translate...my grandfather was a tool and die maker so she might have some knowledge of the terminology to boot.

[SpeedsCustom]

It's Polish! My pride!

Great stuff!

-Jason

[praetor]

Yeah, I thought it was Russian at first, tovarisch, but it's polish...I couldn't babel fish it because babel fish doesn't have polish to english translator.

[ironDigit]

what does that gearcluster do anyway ??

besides making you drewl and feel like your used to be average machine just got real puny...

great build ..... ..... (i'm actually dazzled)

[romteb]

In the same kind if less complex:

Bigcn

If you want to see the build the links you want to clic on are:

"surfacage du chassis"

"Le portique"

"Les montant"

"La table"

Videos of the first tests there

etc..

PS: the machine is not mine

[oxford]

I saw the photo of those non-circular gears and had to see how they worked.

YouTube - non-circular gears and planetary gear

YouTube - non-circular gears and planetary gear

[digits]

Originally Posted by praetor http://www.cnc.info.pl/topics60/frez...c2dfd11b2a5c44 Geez, how is it that some of you guys have the time and resources to accomplish such a feat...possibly while On the Job, I'd get fired for attempting this...lol

Wow, that is an amazing machine - he's even got through spindle coolant!

Did anyone work out where those mad gears went - does he have a rotating head-mount?

[Stepper Monkey]

I have a weird antique British steel and brass positive displacement gear pump along these same lines, with an additional toothed outer rotating ring unlike any seen in the video, but otherwise very similar. I pulled it from an old pre-war engine where it served as the main oiling pump, driven directly from the crank by a bevel gear in much the same manner as a distributor.
It was too nicely machined to toss, and way cool not to keep as a desk widget to confuse people with. I guess it proves that at least at some point they did serve definite practical purposes though.
I wonder does anyone still use this concept for anything today?

Edit - Yup, apparently they still are used, and for things that make my brain hurt trying to understand. Somebody would have to REALLY enjoy multivariable calculus to even comprehend designing these things. Most likely the kind of person they have to safely lock away in a padded room after a few years visualizing this stuff...

From a purely laymans perspective, I did notice that the oval gears in the video caused a difference in effective pitch ratio as they rotated, causing the driven shaft to speed up and slow down twice during each revolution. If I'm looking at it right this would mean a steady input shaft speed would get you a variable pulsing of the output shaft speed at a Hz exactly twice that of the rpm. Why you would want this I don't know, I thought it was pretty cool though. I don't even begin to get the other stuff....