The Inverse Cam Pair Mechanism
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- Опубліковано 7 кві 2024
- Mechanism Monday: The Inverse Cam Pair
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This is an interesting mechanism based off of the work of @karakurist - the top cam pushes the follower forward, while the bottom cam pulls it back. I am trying to create a fully 3D printable Mechanical 7 segment display, so using the inverted cam pair to eliminate the need for a spring or elastic band is key!
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The STL files are (hopefully) coming soon!
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#engineering #mechanismdesign #mechanism #mechanicalengineering #mechatronics #mechanicalengineer #3dprinting #3dmodeling #solidworks - Наука та технологія
I swear there’s an evolution of every maker that goes from bodies->gears->linkages->pulleys->cams your ability to combine them is always awesome to watch
As someone who is new to this, I’m ready to go from bodies to gears 😂😂, but screenshotting your comment so I know what comes down the line
"goes from BODIES to GEARS".....should I ask?
Its not specific to makers that is engineering
Cams are the real deal when it comes to mechanical design!
@masonmakesstuff might as well ask here - any great resources on gears - Especially as used in making?
This is so impressive. The animation of the 7-segment display is a nice touch too
Hopefully will be IRL soon!
Ducati uses a similar mechanism to move the valves in their motorcycle engines! They call it Desmodromic
The originality of their valvetrain is what made me love Ducati.
Mercedes did too
I came here to say the same haha
So they don’t need valve return springs?
@@moneyshifters they still need them at the very least to hold the valves close
Look at the Ducati 'Desmodromic' valve mechanism.
You need to look up the Benz desmodromic valve. From 1889
@@johnantonopoulous6381you need to look up the DaVinci desmodromic paint brush from 1482.
@@johnantonopoulous6381And the racing straight 8 they used it in...
Fun fact: Ducati uses a system like this called desmodromic valves on their engine camshafts to eliminate the valve spring and thus preventing valve float at very high rpm
This is so interesting! Can't wait for the final product!
Getting close!!
@@Engineezy First I’m seeing of you, was this ever completed?
Just put each segment on the tip of a rod attached to a profile groove in a control wheel. As the commin axle turns, the segments are pulled and pushed to show the numbers from 0 to 9 . Now add the gearing to stack the digits into a counter where each digit overflowing turns the next one a single step . Of cause the same used to be done by painting nice looking digits on a wheel .
Says "just" like that's an easy task 😅 good concept idea though
@@SwordFishTheFish I meant it as an easier way than what he already did, because it's basically skipping a lot of steps, and reusing known techniques used for the same job 50+ years ago . All about making it easier .
My thoughts exactly. You need a single drum with 7 tracks and 7 pointers arranged around it. There wouldn't be much complexity at all. You could even hollow it out and have some pointers on the inside so the whole assembly isn't too deep.
Loving these mechanism Mondays
I’m gonna do my best to keep em coming!
I just remembered. There’s a channel called からクリスト. They have a variety of mechanical seven segment display designs and there’s likely one that suits your needs.
🙏🙏
This reminds me of an old mechanical scoreboard I got to take a look at, with a servo motor controlling every segment of every digit. 42 servos.
I'm still working on my own clock after seeing your video. Your stuff is so sick man.
I can literally smell the friction.
literally?
Well, at least you’re literate. That’s good
Love it can’t wait to see this integrated into the final product!
Coming soon!
You should make a mechanical clock with a digital display 😂
Might have to!
_We spent so much time wondering if we could, that we forgot to ask if we should_
Digital clocks with mechanical displays are all the rage, wait’ll they get a load of this!!
A wind-up digital clock! 😄
A simpler version would have the seven segments rotate via 7 pins, sitting inside 7 grooves in a circular cam, like a record with 7 squiggly lines in it, and the input part just rotates 360°. As it rotates, the seven pins are pushed into one of two positions.
Above forty years ago gas stations had that kind of segmented numbers that went around in a circular pattern.
Was fascinating to watch.
This dude is the embodiment of perpetual persistence and I commend it 😊
Judging by that cad animation at the end I would probably say you already know how to stack seven of them
That is incredible!! It can absolutely be done. A _ton_ of complex work, but I'm rooting for you.
technology brought us to places where things can and are done easily, this dudes just trying to go back in time!! USING NEW TECHNOLOGY, HOW AWESOME!!
It's almost a distribuzione desmodromica
It’s beautiful!
Ducati Desmo! The principle dates from the 19th century.
Thank you. Awesome.
Kind of looks like a miniature rotary engine, basically the same concept.
looking forward to this clock design
Cool, now make it print in place!
Brilliant design can't wait to print my own!!!
Awesome work. Hopefully it all comes together as you hope.
That’s an awesome design!
Reminds me of a clock escapement.
Very nice mechanism!
❤ this has been really well executed kudos to you. Love it ❤❤
Watching this reminds me of desmodromic valve actuation
My mind immediately went to Desmodromic system and made my heart skip a beat 😂
Clever stuff!
Use it in a Pinball machine, combined with that ball-activated Geneva mechanism.
Thanks❤❤
Wow that’s really cool
Ducatti did a version of this they called it desmo valves it allows them to rev really high even by motorcycle standards with out floating a valve
This looks awesome!
I wonder what kinds of optimizations still lurk around.
I think that's a similar idea to what Ducati did in some of their bikes where they were able to get rid of valve springs.
Pairing this with a Geneva gear could allow you to actually hook this up to a 3d printed clock spring based clock. Allowing it to be completely 3D printed.
Is huge, for such a small (and possibly light) load.
Beautiful
Thank you!
bro was casually slamming JPBlink
That's clever. Some engine manufacturer should look at that for their intake and exhaust valves. Maybe on a high performance engine, like a motorcycle.
Maybe *Ducati* would try it?
Interesting mechanism, but a secondary benefit of a spring or elastic return mechanism is that it will take up the backlash in the system, which this approach will not. This might not matter if you can carefully control the cycles and you only care about the final angle in one position (segment visible) but comes up especially when you need to be able to reverse directions and return to the same position.
cool stuff!
It won’t stay open after it breaks in if the cam is being lifted vertically and vibration will add additional complications
I must have one!!!!
This short was right after another that showed an animation of a pawn transforming into a queen. It makes me wonder if that too would be possible IRL.....
Just bought the A1 bamboo printer. This is definitely gonna be one of the projects I’m gonna print. Edit and learn how to do electronics for adjust this lol
U could easily condense that down, theres a lot of unused empty space there
That rack and pinion could probably just be a two bar link like the type at the end of excavator arms
And ‘equal diameter’ cam wheel would not require a spring, I think
Ducati :"first time?"
super cool
"Look Mum No Computer" just did 2 videos on similar, VERY OLD versions of this display
Cool 😎
Thanks!
Can someone explain this in layman's terms? And why anyone would need this mechanism? And why it's better than other mechanisms for the same purpose?
Almost reminds me of a 13B rotary engine in an RX-7
reminds me of Desmo valves
That's what I'm talking about!
Bro is cooking desmodromic valves
Awesome idea without spring, looking forward to see the project... kudos...
Thanks! 👍
i love your videos!! always so fascinating [and making me regret not choosing dt for my gcse]
Thanks used to be JQ!!
@@Engineezy i actually prefer to either be called Luka or Lexie now 😅
very nice.
Amazing!!!
Kind of how doorknobs work
I can't wait for simracing enthusiast to climb over each other for the chance to get one of theese as a gear indicator using an arduino
The inside white part of the numbers could be printed in a glow in the dark filament! That would look nice!
True!
A speed bump 🌡️💫🦠👃⛰️🌪️💧☄️🦎🦕🪶🪱
Cool... Izziss how those confetti displays work? A little ornate for just a pixel
yes, it is called a desmodromic cam mechanism
love the idea but wouldn't you have a much simpler and compact system with a peg through an eccentric hole pushing a rod? feels like this got over complicated, especially with the gear. will you be resin printing later for smaller pack size?
Great work still!
You've created a Desmodromic clock.
Desmodronic clock! It should be Ducati red!😂❤
I was just about to ask, this looks a lot like the desmodromic system for springless valve control.
It's frustrating that you can see a small part of the segments that are supposed to be invisible. Maybe you can print them in two colors with white on the front and black on the side/back so it's Invisible when turned away? Very cool though, excited to see where the project is headed
Put that thing inside the water and see if it starts releasing bubbles then that means you can still shrink it. Keep repeating until You see no more bubbles 👍
Make the Decimal Point.
You should then aim to make the alpha numeric ones... I think 15 segment display or something
Is this the best way to do a in and out circular to linear motion transfer? I feel like an alternating gear system or piston style pushing system with kan rod and stuff would have less friction? But maybe would require a different frame size or more moving parts, not sure.
Can someone exxplain why you couldnt just use a gear to move it?
The Ducati desmo valve
Cool very cool
Imagine this. But hundreds of these, for those old school airport flight signs
That would be madness!
But you don't need any of that if you simply rotate a magnet and have another magnet on the segment!
When the magnets attract, the segment is in one position, when they repel, it'll snap to the other position! Easy! The best part is no part...
How to make a shift smooth with magnets?
@@autodystopia same as any motion is smoothed, a little friction; or with oil and a small hole, like a damper in vehicle suspension; or possibly with a gear and air resistance like a musical box.
Personally I would keep it simple and instantaneously switch like an LED/LCD display does normally!
@@kaleygoode1681
> Personally I would keep it simple and instantaneously switch
That's it. I would have preferred the segments to switch slowly, like in a video. And this won't work with magnets.
Neat!
reminds me of desmodromic valves.
Amazing......as per usual
Thank you so much 😀
Just say “as usual.” You don’t need “per.”
Nice keypad!
I love it!
Ducati desmodromic 7-segment display
Mechanical Digital Clock
Ducati 7 segment display
Now make it print in place 😬
I must say ... Your dedication to clockwork is mind blowing... If you're born in probably the 16th, the world would welcome 🤗 another individual similar to the founder of Rolex or Swatch...🎉
😅😅
I know Ducati uses something similar but my brain just went to thinking about how hooligans might use something similar to hide their plates lolol
Behold, a ducati engine
Kinda like a Ducati valve train, no springs 🎉
What is the final goal of your design? What are you trying to accomplish? Sincerely hope you'll respond.