This Expanding Mechanism is Crazy Clever

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3 жыл бұрын

In this video we'll investigate a fascinating expanding pulley mechanism and reverse engineer it for use in a fully 3D Printed Lock Box. I had an absolute blast exploring the possibilities of this mechanical movement and hope it inspires you to try designing some crazy mechanical projects!
3D Printing Files - www.makersmuse.com/expanding-...
Test files for checking clearance - www.makersmuse.com/lock-box-t...
.step and .f3d source files - www.makersmuse.com/expanding-...
3D Printing and Assembly Video - • Maker's Muse Expanding...
Get Five Hundred and Seven Mechanical Movements for FREE here - www.google.com.au/books/editi...
Support Maker's Muse on Patreon
www.patreon.com/makersmuse?ty=h
50 3D Printing Tips and Tricks - gumroad.com/l/QWAh
3D Printing Essentials - www.amazon.com/shop/makersmuse

Пікірлер: 2 200

@williamcastille4193 3 жыл бұрын

Back in the early 90's this mechanism was used to create an "Automatic" gear on a bicycle as it had this mechanism spring mounted and used the torque placed on the pedal to reduce the diameter of the drive gear.

@mimoslavich6639 3 жыл бұрын

When I saw it Iwas like ummm couldnt this be used to make an automatic gear system, and there was your answer.

@donalain69 3 жыл бұрын

@@mimoslavich6639 LOL.. Same me

@donalain69 3 жыл бұрын

What was the reason why this wasn’t continued after the 90‘s? Looks quite superior to stacking different sized gears next to each other.. and would eliminate the gear switching problems..

@ajsparx4133 3 жыл бұрын

There's a mechanism called a variable transmission (I know its used in mopeds) that this reminded me of. It's basically two bowls spring loaded together at the base like this )( When the speed increases, the centrifugal force pulls the pulley apart )-( so it becomes a smaller diameter pulley system. Different mechanism, but same idea behind it.

@donalain69 3 жыл бұрын

@@ajsparx4133 if I understand that right that would be a transmission that automatically adjusts to speed, right? Sounds like a high tech moped...

@TheWiseTorsk 3 жыл бұрын

"Hexagons are the Bestagons" -CGP Grey

@Dragon-xd9em 3 жыл бұрын

All hail hexagon

@anuragneelam8527 3 жыл бұрын

@@Dragon-xd9em hail! hail!

@AquaB33 3 жыл бұрын

Hexagons ARE the bestagons Cgp grey is great :)

@carbonbeaker409 3 жыл бұрын

@@AquaB33 not really, it kinda six to be them(the hexagons.)

@Averymoasycreek 3 жыл бұрын

@@carbonbeaker409 Blasphemy!

@cameronmalchow7597 2 жыл бұрын

I've seen this mechanism used for expanding tables. The ones that spin and have the leaves come from underneath and then lock in place. Very satisfying design.

@user-fo1ke3lx6l 2 жыл бұрын

That's exactly what I want to do myself one day. Hopefully author will take a look at this comment and will try creating a 3d printed expanding table so we can try this ourselves. Probably others will proceed with the bigger versions of it 😅 Anyway, a great video there! Thanks a lot 🙂

@chrisjones3733 Жыл бұрын

Yeah, the Fletcher Capstan table for 50k. Its pretty amazing though

@SageSylvie 3 жыл бұрын

507 Mechanical Movements is just a gold mine that needs to be explored on this channel.

@86abaile 3 жыл бұрын

The expanding pulley design is used in the fletcher capstan table.

@MakersMuse 3 жыл бұрын

That table is a work of art! I think it might use some elements of this mechanism but it's also far more complex with the inserts that fill the gaps.

@therealpanse 3 жыл бұрын

ahhh... i wanted to say that.

@CapApollo 3 жыл бұрын

iam 4 hours late..

@tye2876 3 жыл бұрын

Late also, I wonder what other mechanisms go into the table to get the pieces to open wider then close to accept the wedges moving up.

@therealpanse 3 жыл бұрын

@@tye2876 I'd expect some helical tracks, some parallelogram to move them... well... parallel. Also maybe some springloaded detent to keep everyting in place.

@bloodwolf2609 3 жыл бұрын

as an Industrial designer I can say that the mechanical movements book is extremely worth the purchase

@julienmauguin3214 3 жыл бұрын

I bought this book too some days ago and it is an amazing source of inspiration

@harpereverett3300 3 жыл бұрын

Purchased immediately after hearing it

@GollumBeetus 3 жыл бұрын

I’m a junior in college for Mechanical engineering technology and mechatronics. Any tips on getting a internship

@EmilBjrn 3 жыл бұрын

Since it's out of copyright, you can find all of the movements online if you search for the title on Google. It's a cool site to click through from time to time.

@cvoisineaddis 3 жыл бұрын

The website also has some flash animations of some of the mechanisms.

@julio709 3 жыл бұрын

Why does this guy look so friendly and kind? And why do I feel in 2001 looking at his face?

@benjaminh.morgan3193 3 жыл бұрын

Probably cause he looks like Spencer from iCarly?

@xtankhillx7970 3 жыл бұрын

This mechanism reminds me of a Centrifugal clutch that expand when torque is applied to grab an outer cylinder

@JustCallMeChad 2 жыл бұрын

I had the exact same thought when watching the vid, and came to say the same thing.

@GuardianAngle93 Жыл бұрын

I'd swear it's the clutch on my trimmer

@irishmick4278 Жыл бұрын

That's the first thing that comes to mind.

@stephanied9331 Жыл бұрын

Added this same comment then wondered if I was the only one.

@JesseSchoch 3 жыл бұрын

worth mentioning this is how a lens aperture iris works. I used this type of design on my milling machine to lock the spindle via it's splines.

@allhumansarejusthuman.5776 3 жыл бұрын

Very cool!

@frogz 3 жыл бұрын

exactly what i thought when i saw it, its inverse of it

@neilbajaj503 3 жыл бұрын

Hi Angus, this this expanding pulley design was used in the design of an underactuated robotic finger in this academic paper: Underactuated Gripper That Is Able to Convert from Precision to Power Grasp by a Variable Transmission Ratio (Spanjer, Balasubramanian, Dollar & Herder, 2012) The finger has two joint both actuated by the same tendon, which passes over a pulley at each joint. By changing the size of radius of the lower joint's pulley, the stability of the finger tip force and grasping capability of the finger could be changed while still retaining some of the major benefits of an underactuated finger.

@the.SteamingVegan 3 жыл бұрын

Can I just say, as someone who has never done any engineering, I find this fun, fascinating, and approachable! Super cool stuff

@KTPDAILY 9 ай бұрын

you and me both --- we can learn anything!!!!

@DSSlocksmiths 3 жыл бұрын

The expanded pulley has exactly the same friction contact area with the belt as when at the minimum size. There are many, many small vaults and lock boxes that use a system like this, but only to drive 3 bolts (up, down and the locking side, though sometimes there's a 4th, but that's normally where the lock bolt blocks the rotation) with the plate driven by the outside handle. Nice project! I'm also impressed you can get Fusion to move things that smoothly in the animations with contacts on!

@3DPrintingNerd 3 жыл бұрын

That mechanism is gorgeous and I love that you've modeled and 3d printed it. It's way easier to understand once you see it in motion in the real world.

@JonathanScruggs 3 жыл бұрын

I predict a super sized version coming soon. :P

@MakersMuse 3 жыл бұрын

Ohh a huge one would be insane!

@pavellelyukh5272 3 жыл бұрын

@@MakersMuse Dude the locksmith lawyer will not be impressed. A magnet lock can easy be hacked using a magnet and then rotating the wheel by hand. You need to connect it to a pin locking mechanism which releases the wheel when it begin rotating when the correct key is inserted that would need to be part of the gear key. Also making an organic tooth path and hiding the teeth under plastic will mean you'd have to capture the dimensions of the regular key and the gear itself.

@AhsimNreiziev 3 жыл бұрын

@@pavellelyukh5272 You forgot that this was a puzzle box, not a lock to secure valuables with. The Lockpicking Lawyer deals with the latter, not with the former. In other words: concerns he would raise are entirely irrelevant to this video.

@pavellelyukh5272 3 жыл бұрын

@@AhsimNreiziev actually locks are puzzles. Magnets aren't because the effect is too global. Imo a puzzle requires the manipulation of objects in 3-6DOF to work so unless you use a extremely advanced magnet with selective polarity you'll basically only have 2DOF puzzle

@thzzzt 3 жыл бұрын

Use for the expanding pulley: How about an omni-directional hat stretcher?

@blerst7066 3 жыл бұрын

Perfect for people with big heads, like me.

@julethug_7361 3 жыл бұрын

Thats a beyblade

@gabandreialcantara4649 3 жыл бұрын

@@julethug_7361 YES YES YES YES YES!

@donaldvincent 3 жыл бұрын

There is an expanding table design that uses this principle in woodworking/furniture building circles.

@7own878 3 жыл бұрын

"And this important because it's beautiful." I like your mindset

@frankrwalsh 3 жыл бұрын

it has been used in a bicycle for an automatic transmission. Ref: Yankee bike

@samuelglover7685 3 жыл бұрын

Thanks for that. It does seem like a pretty good mechanism for some kind of continuously varying transmission.

@punkr0cker22 3 жыл бұрын

Yankee bike 😂 perfect

@zid_just_zid 3 жыл бұрын

It could be used as a fly wheel, the change in size will affect inertia, dunno where thats useful tho.

@MakersMuse 3 жыл бұрын

Actually that could be pretty neat! Like how swinging your legs out on an office chair slows or speeds up your rotation.

@liamburgess3385 3 жыл бұрын

I think I've seen a similar use case in some clocks

@MrFixel112 3 жыл бұрын

@@MakersMuse How about variomatic?

@subliminalvibes 3 жыл бұрын

That mechanism is called a governor!

@Andreas-gh6is 3 жыл бұрын

It's also how cats rotate in midair.

@make.anything 3 жыл бұрын

Another masterful mechanism Angus! I wonder what kind of funky stuff you could do by using different shaped slots for each pin :0

@MakersMuse 3 жыл бұрын

All sorts of funky motions! I'm definitely gonna keep experimenting

@gamingforlive2150 3 жыл бұрын

there have been tables using it

@Zynh0722 3 жыл бұрын

@@MakersMuse This is primarily just a thought, but I imagine if each pin was offset slightly beginning the motion, you could likely achieve an almost revolving opening pattern, where each locking lug opened sequencially

@akashsaini100 3 жыл бұрын

bro time for u to start work on new project :D

@JamieMoller 3 жыл бұрын

its a cam

@jimigreco7230 3 жыл бұрын

6:08 the spinning ashtrays segment unlocked memories from my past that I forgot I had

@orbismworldbuilding8428 3 жыл бұрын

someone i knew had one of those, knew them a long time ago

@whyoh8756 3 жыл бұрын

they're used in expanding dining tables!

@jaypaans3471 3 жыл бұрын

Two thoughts: 1) expanding pulleys (or whatever they are called) are used in a centrifugal force clutch mechanism, like in a scooter. 2) pulleys are often use with ropes and they do not need to be concentric/circular to work.

@Cloudman572 3 жыл бұрын

Agreed, my 1st thought was the old massive leather belts used on 19th century machines (looms and machine shops with 1 engine powering multiple machines). The design could be used as a speed control if a idler tension wheel is used to compensate for the diameter change.

@AlexSwavely 3 жыл бұрын

The 'expanding pulley' used in belt CVT transmissions use a different mechanism to move the sides of the pulley toward the centerline.

@Tom-yc8jv 3 жыл бұрын

That is not for a clutch system, period. It's made to adjust the ratio of a pulley system, so the speed of the drive chain can be speed up or slowed down. Pulleys use ropes, chains, belts, tracks, or anything that is flexible, so as long as the shape is rotating, it doesn't matter what the shape of the pulley is.

@OtakuUnitedStudio 3 жыл бұрын

@@Tom-yc8jv The so-called "clutch" (actually governor) on a motor scooter is belt-driven, so it could potentially work with that. However, I don't think most do.

@allhumansarejusthuman.5776 3 жыл бұрын

They actually are for flat belts! Their purpose is similar to the purpose of the CVT but not identical. Ive seen them in manuals for machine tools from the 1920's and older but never owned one myself. Specifically for shapers, otherwise known amd arm-strong's These tools are so rugged even from the 1920's they still are in use in modern shops who can afford the space for them or shops that need skiving done like you se in copper semiconductor heat sinks! But they are very rarely made today, because of low demand and high market saturation, it really is an under appreciated machine tool. I could not hide my excitement to see a piece of it resurrected for a modern use!

@pjnoonan2211 3 жыл бұрын

Thanks for mentioning the book 507 Mechanical Movements. It has proved quite useful to me.

@ryanstaats 3 жыл бұрын

This is awesome and gorgeous. Great work Angus, love it.

@clintb9987 3 жыл бұрын

What a cool thoughtful design, i am going to try this. thanks!

@JoesWorkbench 3 жыл бұрын

Reminds me of a longworth chuck that bowl turners use on their wood lathes

@MakersMuse 3 жыл бұрын

Hey you're right it is very similar to the scroll in chucks...! Great observation didn't even think of that.

@Inventorsquare 3 жыл бұрын

And a chuck boring ring.

@maxleadleybrown 3 жыл бұрын

@@MakersMuse No a scroll chuck is different again; A longworth chuck uses plates, one with left hand spiral cutout and one right spiral cutout, back to back

@christiansorensen9175 3 жыл бұрын

Came here to say the same thing. Looks just like a longworth chuck. I wonder how much more "bite" you could get out of a longworth chuck by driving it on a gear... Tried to use one once for a non wood turning application and was surprised at how little holding torque it had. (Could have been because I made it... lol)

@jimabraham7275 3 жыл бұрын

Just finished this, Angus. It's both ingenious and magical! My little granddaughter is going to love it on Christmas day. Thank you so much for a truly great design. I'm now printing out your egg puzzle. That'll keep everyone quiet!

@MakersMuse 3 жыл бұрын

Thanks for letting me know ! That's wonderful :)

@marcfruchtman9473 2 жыл бұрын

Really amazing design work. Thank you also for showing "507 Mechanical Movements" wow, what a great find!

@adrianscarlett 2 жыл бұрын

I was thinking of this for an expanding wheel a while back. My plan reduced the effect of the individual sections creating flat spots by utilising a stack of these offset from each other. I also added a rubber pad that compressed more at the peak of each section. I was attempting to make a bicycle wheel that could reduce diameter for easier use on public transportation. It works reasonably well.

@MajorLeagueModdingHQ 3 жыл бұрын

Wouldn’t the drum on a CVT Transmission kind of resemble an “expanding” pulley?

@lukehill6395 3 жыл бұрын

depending on the type of CVT, yes.

@jackhammer7543 3 жыл бұрын

I was thinking the same thing. A CVT based on conical pulley system should work

@pekacar4658 3 жыл бұрын

There was some kind of bike CVT designed i believe in Australia with such mechanism in 1980 s or something.

@matthewhoffman9242 3 жыл бұрын

Was thinking it looked like a early pulley for soft starts and when up to speed it expanded to operating size like from torque to speed

@terryfuldsgaming7995 3 жыл бұрын

They used to use them as a clutch on pretty much all large heavy devices that didnt require constant power. Mills for example. They were used to get the big millstone moving with a power source like a horse, or water, then when the power was removed it would become smaller again, detaching and allowing omentum to take over.

@onsafari 3 жыл бұрын

This is truly inspirational. I think you deserve applause for your dedication and tenacity to this project. Well done.

@Hello_there_obi 3 жыл бұрын

The description and diagram is very clear so yeah, it is simple! And beautifully elegant.

@killawhatt8620 3 жыл бұрын

I really enjoy watching people who LOVE what they make/create.

@microcar14 3 жыл бұрын

They were onto CVT transmission for longer than we thought.

@mateofoulkes499 3 жыл бұрын

I've always been bugged by how the hands in oval shape clocks don't adapt their lenghts to the oval shape. This mechanism might solve it so I can finally rest in peace

@eekee6034 2 жыл бұрын

When I was little, square clocks were in fashion, particularly in cars. The hands moving in circles really bugged me! :) I think a static cam could be used to change the hand lengths whatever the shape of the face.

@j4nch 3 жыл бұрын

I love seing such mechanism. Is it just me or wouldn't it be very satisfying to see this driven by a motor like a safe :P. You well deserved a new patreon support for your hard work!

@viodre6652 3 жыл бұрын

I've seen mechanisms like this before and it's been on of my favorites

@tr0nic_442 3 жыл бұрын

I think it's used in submarines doors They use it because it's much safer then a door handle

@MakersMuse 3 жыл бұрын

That's really neat! Because it handles the pressure better with evenly spaced bolts I would guess?

@barry99705 3 жыл бұрын

They use linkages.

@jimt97038 3 жыл бұрын

Also used in woodturning. Google “Longworth chuck”

@stuartcooke2787 3 жыл бұрын

I’ve seen this design used for an amazing expanding round table that had extra pieces to fill the gaps rise up from the middle at the same time as the table expanded

@tontsa132 2 жыл бұрын

Nice mecanism and I love your box design

@vosotros5870 3 жыл бұрын

this reminds me of the expanding tables! now they make a lot more sense

@aadvaithmandampully3279 3 жыл бұрын

Thanks Angus I've been looking to get into 3d printing so I'm trying to make myself more proficient at fusion and I can say that I have achieved it almost a hundred percent due to Ur cad for noobies playlist

@partsdave8943 3 жыл бұрын

I started using PrusaSlicer with my Ender 3 about a year ago. I was/am so happy with the results. Much better than I had been getting with Cura.

@crossthreadaeroindustries8554 2 жыл бұрын

Super great use of 3D printing - mind benders.

@GregTank 3 жыл бұрын

Very nice design, great work!

@mrclown7469 3 жыл бұрын

Now we'll see how smart Popeye really is... 😅

@MakersMuse 3 жыл бұрын

Hahaha oh man... he'd just throw it off the balcony but I really want to find out now.

@frankscruggs9089 3 жыл бұрын

3 Jaw self centering metal lathe chuck : the single slot's pitch is so gradual that it engages each jaw several times

@magicalpencil 3 жыл бұрын

same on my old wood lathe

@wesleymays1931 3 жыл бұрын

this is that but 6 jawed and coarser pitch

@tyrel7185 3 жыл бұрын

Scroll chuck.

@thearcenist 3 жыл бұрын

Nice work, the mag latch is a very clever design. Well done!

@jdmeesey 3 жыл бұрын

There are expanding tables that use this mechanism, and they have leafs that move into place with the spinning motion to fill in the gaps. In this way you don’t get an adjustable pulley as much as one with two distinct sizes. The tables look super cool too!

@Tom-yc8jv 3 жыл бұрын

That adjustable pulley is for changing the ratio in a pulley system, to speed up or slow down the drive chain. It's still used to this day.

@VuLamDang 3 жыл бұрын

yeah the expending pulleys is the corner stone for modern CVT transmission

@SineEyed 3 жыл бұрын

Makers Muse: "... I suspect this design didn't see very much use..." also Makers Muse: "... it's kind of bad at what it was designed for..." 😂

@Akuseiko 3 жыл бұрын

The Fletcher capstan table almost certainly uses a variation on this design.

@dtrimm1 3 жыл бұрын

Wonderful - thanks!

@grzegorzzazirski4620 3 жыл бұрын

So simple and so awesome

@TheWadetube 3 жыл бұрын

It's a table that has been around for some time now. The whole table gets bigger and adds a rising centerpiece that settles in to fill in the gap. As for a pully the tee shaped outer ends need to overlap while small.

@benloi9874 3 жыл бұрын

It reminds me of watertight (or airtight) door locks, designed to secure doors against pressure differences, used in ships or passenger aircraft.

@rangerdanger822 3 жыл бұрын

Or the one of the vault door designs from Fallout

@EllAntares 3 жыл бұрын

@@rangerdanger822 Only FO4 111 ones. Most from before where just roll and push doors.

@Usual_User 3 жыл бұрын

This looks amazing!

@legionjames2.091 3 жыл бұрын

Very cool! I commend you for your persistence dude

@Bob_Dub 3 жыл бұрын

*_"This Lock Box Mechanism is 150 Years Old"_* Wow, who knew 3d printers had been around for so long?! ;D

@pig_master101 3 жыл бұрын

Wwow

@sxeshoe 3 жыл бұрын

With the symbols it looks like it could be a prop for Stargate.

@jivejunior8753 3 жыл бұрын

Precisely what I was thinking!

@KingQuetzal 3 жыл бұрын

Was so funny I started watching the then realized I have this book so I went and grabbed it. Love the content.

@BrunoPonce 2 жыл бұрын

Well done, yet again!

@jakeman3659 3 жыл бұрын

I could see a dm for dnd giving the final version to their players and a couple sessions later giving them the key cool box for sure

@MakersMuse 3 жыл бұрын

Yeah that'd be really neat! With secrets hidden inside.

@benjybooth2840 3 жыл бұрын

I was thinking how to put this in a dnd campaign

@phantomflash6873 3 жыл бұрын

that simple expanding pully just gave me (in theory)a brileant idea for a comitative beyblade gimmick

@shadowsoul720 3 жыл бұрын

I was trying to think of the same thing! No joke :O Only I'm wayyy to new to 3d printing to accomplish that xD

@marcdraco2189 3 жыл бұрын

Wonderful work young man!

@MahdiDesigns 3 жыл бұрын

At my job we made a prototype of a robot to drive through large underground pipes. We used this mechanism attached to the front of the robot to expand sensors outwards so they could make contact with the pipes wall. We later scrapped the mechanism and went for something else because it didn't provide a high enough expansion ration to cover the range of pipes we were working in... It could also be used to lift and move cylinders by expanding within them creating a high friction force.

@funkystudent5403 3 жыл бұрын

Who else randomly got this recommended to them, but are happy about it?

@ronanlanam1127 3 жыл бұрын

Yes

@kurtlindner 3 жыл бұрын

OMG, Angus doesn't hate Ender 3s anymore, the ground feels like it's gotten cooler... ;)

@amadeuscardenas4623 3 жыл бұрын

Man I'm loving your work

@raven_fpv 3 жыл бұрын

Very cool lock box! I just bought the STL files and am getting the test print started now. I also have the Ender 3 Pro so this will be a good print!

@nickiebanchou 3 жыл бұрын

title : "crazy clever" my expectation : "oh is there more than a cam?" content: "actually it's a cam" i feel baited....

@Gaswafers 3 жыл бұрын

The Virgin Machinist vs The Chad Cam Master

@andyman8630 3 жыл бұрын

it's an S cam

@lampostsamurai2518 3 жыл бұрын

Okay, but hear me out, what if a cam, but actually six cams at once?

@Celcius1 3 жыл бұрын

I could potentially see it used in earlier braking systems, like early pre-cursors of drum brake systems

@samiraperi467 3 жыл бұрын

Or a centrifugal clutch.

@paulpickett4522 3 жыл бұрын

Dude....What you made is beautiful...

@thekeywizard3313 3 жыл бұрын

Most in floor safes use a similar mechanism to withdraw 3 bolts allowing the safe head to be lifted out with a handle. The better ones allow you to remove the dial, and some have specific dials that are offset from others, so without the correct dial AND the combination, you can't open the safe. I can provide photos if you like. Added: Also, the entire Wheel is the Cam, the Pins are pulled and pushed by Channels in the Cam which drive the Bolts, your bolts have arcs attached in the early version, but they are still bolts. A Cam is any driving device set to pivot on a single point.

@MarMonkey2606 3 жыл бұрын

This actually reminds me of an expanding clutch mechanism.

@mclaynebalzly1739 3 жыл бұрын

This would make for a really good cvt pulley for a cvt transmission. You could do this on a bicycle to make an automatic transmission bicycle

@billysbikes8671 3 жыл бұрын

already been done but it cant of been that great as it never caught on!

@mclaynebalzly1739 3 жыл бұрын

@@billysbikes8671 that’s lame

@Jynxs13 3 жыл бұрын

This is your best video yet. Furthermore, I feel you could further expand upon the concept you have already developed to create a new style of anti-tempering combination lock.

@kengoold7157 3 жыл бұрын

this is great. awesome channel

@eivindthorsen3547 3 жыл бұрын

I would say the most regular use of this (can we call it "an extrapment-device" ? ) is in some variations of recoil starters, like chainsaws =)

@ssseaweed3800 3 жыл бұрын

he literally just made a fancier version of a cookie jar

@everythingawesome7671 3 жыл бұрын

Lol yas

@FarBeyondStrange 3 жыл бұрын

Correction: He made the best version of the cookie jar.

@jamoin3829 3 жыл бұрын

Thanks to you i came along 507movements amd used it many many times🙏

@jameshamilton4406 3 жыл бұрын

Well done Angus. Model printed out extremely well no problems. Will now have to expand horizons and learn how to use Fusion 360, Thanks again

@MakersMuse 3 жыл бұрын

Great to hear! Thanks

@DownhillAllTheWay 3 жыл бұрын

I would expect the expanding pulley to work reasonably well with a V-belt.

@willb5150 3 жыл бұрын

I need this for my pimp'd out Magic the Gathering deck!

@hadiTHEgreat87 2 жыл бұрын

It's interesting! Love it! It maybe fun to add it to my list to make things with a 3d printer

@o0Avalon0o 3 жыл бұрын

I always LOVE mechanical designs like this but I always called them analog, since that usually meant non-electric interacting objects.

@mkhornetHD 3 жыл бұрын

well, a CVT belt transmission seems like an obvious use case for this

@rileyquest 3 жыл бұрын

This is so cool! If I had a 3d printer would love to print one to use as a dice box or maybe deck box for mtg!!

@beowolf9480 3 жыл бұрын

I have a puzzle from I think the 90s which uses a bit of a modified version of this mechanism to allow them to move independently of others, however, where it's a modified version of this puzzle is that each pin moves a plastic divider, allowing some to move at some times and sometimes not at all, creating for an interesting combination puzzle which can be solved pretty easily

@asgard_ 3 жыл бұрын

Damn, the algorithm has good taste for once!

@andyman8630 3 жыл бұрын

Al Gore Rhythm

@silverhawk2291 3 жыл бұрын

you should try altering the gaps between gear teeth to see if you can make it so you need a specific key like gear

@MakersMuse 3 жыл бұрын

That's a mighty fine idea honestly...

@tyrel7185 3 жыл бұрын

Geneva gear.

@xXxserenityxXx 3 жыл бұрын

This one video makes me want to switch from EE to ME. That is a thing of beauty. Good effort bud.

@nomekop777 Жыл бұрын

Thanks to this video, I've actually bought this book and a 3d printer!

@crelos3549 3 жыл бұрын

7:11 you can still open it with a magnet and without the key.

@Henrix1998 3 жыл бұрын

Yep, this doesn't have "that" kinda key

@bradster2214 3 жыл бұрын

simple fix, give it an actual key to pull back a bolt that locks the disc in place.

@MaddHatterTTV 3 жыл бұрын

Add a flat at the end of the spirals and you will have a locking mechanism. 😉

@xiongpaolee 3 жыл бұрын

Awesome, thanks!

@ControlledWrinkles 3 жыл бұрын

When I worked at TechShop, there were a couple of guys that were laser cutting Delrin to make and sell cams for sewing machines like yours. I congratulated them on finding a solution to a very unique need.

@craigkoch977 3 жыл бұрын

I've seen this used by the Amish in designing a round table that expanded for guests.

@XanTheDragon 3 жыл бұрын

"so you can definitely print this at home on your low end 3d printer" snobbishly laughs in mk3s with mmu2

@frogz 3 жыл бұрын

*laughs tediously in 3d printing pen and hours...days....weeks of patient hand work*

@happyjohn354 3 жыл бұрын

screw 3d prinking i want to machine this out of steel and aluminum...

@braveoil13 3 жыл бұрын

I really love this video it felt like I was having an actual lesson from a teacher. Your like the Robotics teacher I wish I had. my robotics teacher barely taught us anything

@terryfuldsgaming7995 3 жыл бұрын

That expanding pulley design was used as a basic clutch on many items of the past. Eg when power is applied, it expands outward to touch the inner surface of a tube, thereby powering the tube. Then when power was removed, the pulley would disengage and allow the tube to continue to spin unpowered with its momentum. This was used on many gates and mills just a few hundred years ago.