r/EngineeringPorn • u/Crticanagattah_ • 3d ago

Smooth and simple

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887 Upvotes

98% Upvoted

31 comments sorted by

57

u/OddRobotics 3d ago

i'll be curious how you handle the air lines for the rotating cylinder

51

u/Crticanagattah_ 3d ago

Problem for tomorrow😬😁

10

u/OddRobotics 3d ago

i like the cam idea. depending on the cycle count, you might run in to a issue with that studder in the middle. na hard cam follower will make quick work of that thin plate with enough repetitions

1

u/Plastic-Pair-9323 2d ago

Seasons don't fear the FESTO

26

u/mathemagicat 3d ago

Continuous swivel push-to-connect tube fittings for air and water

I may not be very good at designing a cam control system, but I am a champion at finding that weird part on McMaster that you didn't know you needed.

u/Crticanagattah_

13

u/OddRobotics 3d ago

no cycle life rating sadly, the stuff i'm building makes about 4 million repetitions a year, about 10,000 times a day i need that air fitting to swivel without the hoses catching, or air leaking and the need to replace the fitting every week. they make gyroscopic steel air fittings that are slick af, but they'll cost you an arm and a leg.

7

u/probablyaythrowaway 2d ago

No way around it. Some parts you have to either pay a lot for or consider them consumable design around that limitation and put it as a weekly PPM inspection and replacement for the maintenance department.

5

u/mathemagicat 3d ago

Ah, yeah, at that rate you kind of have to pay the arm and the leg one way or another.

Hopefully OP's application is a little slower-paced.

4

u/laserist1979 2d ago

I would try running the air lines through the rotation axis to decouple the rotation.

7

u/probablyaythrowaway 2d ago

Nahh KISS - Keep it simple stupid.

That’s More complex and longer to repair and more chance of rubbing and bursting a pipe and harder to find a leak.
You’re not thinking about the poor maintenance tech who has to fix it quickly on a production line that’s down and costing the company £100,000 a minute.

It’s only flipping 180°

Just run the air line off the left hand side, with silicone pipes and enough slack for the movement and tack it back with a zip tie so it dosent catch on anything else.
It won’t fatigue the pipe, most they may have to replace is the festo elbows every couple thousand hours but that’s a 5 mins task and fittings like that are considered consumables.

That’s how we do it in industry, and if a machine was delivered to me like the way you described when I was in maintenance I would have rerouted it.

Bish bash bosh send it.

3

u/OddRobotics 2d ago edited 2d ago

festo part #2094

research rotary unions. they have single port and multiport options from all the main suppliers

edit: Deublin 1005-000-037 In-Shaft Union also allows passages through existing axis

8

u/scharmlippe 3d ago

Why is there a spring?

17

u/Crticanagattah_ 3d ago

It helps go around the corner.

10

u/ammicavle 3d ago

Reduces load on bearing when hitting the turn, smooths movement, increases longevity.

14

u/Practical-March-6989 3d ago

Simple you say

10

u/Erstwhile_pancakes 3d ago

Before the electron, there were cams.

2

u/vanbul 2d ago

Will not work on high production rates.

1950 solution

1

u/Crticanagattah_ 2d ago

This will work 4ever!

4

u/dipstick162 3d ago

Pretty clever

3

u/ozzyperry 2d ago

Doesn't this eventually slip?

1

u/lordnacho666 3d ago

What do you call such a mechanism?

15

u/Crticanagattah_ 3d ago

It called “I donnt have the budget for 3 cylinders” mechanism.

4

u/FrickinLazerBeams 3d ago

I mean, with unlimited budget, the solution with fewer parts to maintain is generally still the best one.

9

u/justanaccountimade1 3d ago edited 3d ago

Cam. Maybe pin in slot.

I wonder why the spike is there. Maybe in case the spring breaks.

2

u/adamthebread 3d ago

The spike in the slot? That's there because that's the patth the offset pin has to take in order to flip around. It's the roulette of the pin

2

u/FrickinLazerBeams 3d ago

The spike is there to make it so what you see in the video.

2

u/justanaccountimade1 3d ago

The ball bearing doesn't touch the spike.

2

u/Fast_Role_6640 3d ago

I love it. Thanks for taking the time to post this.

2

u/Boxofbikeparts 2d ago

This is cool! I like outside the box solutions. I did something with a similar motion but just used a gear rack and pinion gear.

For the air, just have the fittings point straight out.