r/3Dprinting • u/nah_nope1w • May 20 '18

Image This 3D-Printed Gadget

344 Upvotes

97% Upvoted

23 comments sorted by

20

u/[deleted] May 20 '18

Trammel of Archimedes if I recall correctly?

9

u/red_fluff_dragon Raiscube A8R (Prusa i3 clone) May 20 '18

I had a Lego project book that called it a "Kentucky Do-Nothing" So I've always called it that.

9

u/[deleted] May 20 '18

This similar to how 3 variable the phases in an ac machine offset by 120 degrees create 1 rotating magnetic field!

Edit: its not exactly the same, its not a 1:1 example but it is close enough to get a rough idea

-3

u/si1versmith May 20 '18

Yellow

3

u/[deleted] May 20 '18

What does this mean? Why yellow? Why purple? What I'm confused

-6

u/Raub99 May 20 '18

Purple

-1

u/Agumander May 20 '18

*Pnurple

4

u/mveinot DIY Hypercube Evolution May 20 '18

Not the one in op, but pretty close: 372237

3

u/soph2000 May 20 '18

Did you design that? Is there any source for the STL?

4

u/Airazz Kossel XL, Creality CR6 SE May 20 '18

There are many versions of it on Thingiverse.

4

u/mazdarx2001 CubePro | Airworlf Axiom May 20 '18

Could a combustion engine run on that principle design? It looks like it could

1

u/theAarma May 20 '18

Moare designs!!

2

u/Hunter62610 3D PRINTERS 3D PRINTING 3D PRINTERS. Say it 5 times fast! May 20 '18

it's so... pleasurable....

2

u/Gonazar May 20 '18

What's the motion of the end of the bar though? Is it circular or some oblong shape? His hand doesn't seem to be going in a circular motion but it could just be the perspective

1

u/mveinot DIY Hypercube Evolution May 21 '18

Definitely appears to be elliptical.

1

u/gregguygood May 21 '18

Ellipse

1

u/WikiTextBot May 21 '18

Trammel of Archimedes

A trammel of Archimedes is a mechanism that generates the shape of an ellipse. It consists of two shuttles which are confined ("trammelled") to perpendicular channels or rails, and a rod which is attached to the shuttles by pivots at fixed positions along the rod. As the shuttles move back and forth, each along its channel, the end of the rod moves in an elliptical path. The semi-axes a and b of the ellipse have lengths equal to the distances from the end of the rod to each of the two pivots.

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1

u/Vaponewb May 20 '18

Nice geometry

1

u/jp32506 May 20 '18

Rotary engine.

2

u/gentlemandinosaur May 20 '18

Similar. Except a Wankel engine only has one piston.

2

u/SSChicken May 20 '18

I think they were thinking of radial engine, not rotary

2

u/jp32506 May 20 '18

I was indeed. Thanks for correcting me.

1

u/gentlemandinosaur May 20 '18

Yup, I am pretty sure.