10 Ways to Build a 2:1 Reduction from Useful to Useless

10 Ways to Build a 2:1 Reduction from Useful to Useless | LEGO Technic

Рет қаралды 145,199

Күн бұрын

Hi,
in this video, I'll show you 10 ways to build a 2:1 reduction using Lego Technic. Just to make it clear: there's basically no reason not to use gears, but that's where the fun begins :)
Enjoy watching,
2in1
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Credits for the linkage:
Arglin Kampling's Poly Bridge Linkage Repository: docs.google.com/document/d/1-...
Links:
Rebrickable (part list and .io file):
#7 rebrickable.com/mocs/MOC-142341
#10 rebrickable.com/mocs/MOC-142342
Music:
• Underwaterbeats - Neon...
• Glory Be
• My Achy Heart
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Timestamps:
0:00 Intro
0:06 1 Gears
1:22 2 Belt
1:53 3 Bevel Gears
2:36 4 2x Speed Crank
3:14 5 Turntable
3:44 6a Stepper I
4:39 6b Stepper II
5:16 7 Gearbox | Building
6:14 7 Gearbox | Showcase
6:49 8 Differential
7:35 9 Rachet | Building
8:18 9 Rachet | Showcase
8:44 10 Gearless 2:1 Ratio | Building
10:23 10 Gearless 2:1 Ratio | Showcase
11:11 Thanks for watching!
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#lego #technic #gearbox #mechanism #gears

Пікірлер: 96

@rcengineer Жыл бұрын

Ok I kind of get why it's useless here but differentials are actually incredibly useful in other cases. This just doesn't happen to be one of them.

@ltcolthorin8661 Жыл бұрын

Many of these are useful for different things. The unique movements are great for different types of animations.

@keybored387 Жыл бұрын

surely the gearbox is better than number 7?? definitely more useful than steppers and turntables?

@briansrandomstuff411 Жыл бұрын

The gearbox is like planetary gears.

@keybored387 Жыл бұрын

@@briansrandomstuff411 1. yeah they are like planetary gears but can also be considered a gearbox 2. how is that related to my question..?

@briansrandomstuff411 Жыл бұрын

@@keybored387 Gearbox is more useful bc it can do more than a 2:1 gear reduction and it has functions just like planetary gears.

@Rochelleis40 Жыл бұрын

@@briansrandomstuff411correct

@bowfuz 6 ай бұрын

Even the differential is better than 7, it does the same thing better with less parts

@ArglinPB Жыл бұрын

Holy sweet jesus you actually built that reverser linkage... I'm kind of scared but also intrigued what some of the other mechanisms in my repository would end up looking like in lego form. Well done! XD

@in1 Жыл бұрын

Oh, hi, I coincidentally just finished watching your video :) Of course, some of the linkages in the repository are just simply too big to work in the physical limitations of Lego, but for most of them it's a lot of fun to actually try to build them. For example, straight line linkages (I built some of them based on your Wikipedia animations) or thang's mechanisms work really well in Lego. Thanks for the inspiration :)

@ArglinPB Жыл бұрын

@@in1 I'm glad to hear that! Also yeah, it seemed like you were starting to reach the limits of what lego could handle from just looking at that linkage based reduction mechanism, or at least at the scale you were working at, haha. Well done though, nevertheless. I wouldn't have thought something like that would even be possible. :)

@diezelleprozo6047 Жыл бұрын

@@ArglinPB and it's "completely overcomplicated", so that's a big plus... ish

@Vaterraman Жыл бұрын

Steppers are just Geneva drives for the most part. They can be useful in converting continuous rotation to an interval based rotation. This can be used to establish accurate increments throughout a rotation. However, it can also be used to deliver consistent timing and this is exactly why older film projectors clicked. The geneva drive provides. consistent timing of still image frames. It can also be used in other machinery, including watches. The stepper isn't exactly the same, or at least the Lego form, mainly the complexity of the gear in a geneva drive. This results in a differing rotational velocity during the interval of rotation, while the geneva is very accurate and snappy. The greatest concern of this type of drive, especially the geneva, is rather quick wear.

@zombievc10 Жыл бұрын

Your videos are very educational in the aspect of lego thechnic my friend (new follower)

@dinhtuan752 Жыл бұрын

Another method: place 2 42142s on an axle of any length, and haft bushings on the middle to make a haft stud space. :)

@user-or7om6je3k Жыл бұрын

This is the type of content I am looking for..and almost nobody creates...Gear combinations, how to create steering setups, different connector combinations, how to setup motors vertically, but your gears need to be horizontally placed etc etc..all the problems you have to deal with in mocs.

@heho1 Жыл бұрын

Last one ist best 😊 Brilliant ! Thank You

@brickengineering4980 Жыл бұрын

Very nice vid I love it! It’s a cool video also where do you buy your power functions? Thanks :)

@in1 Жыл бұрын

I got them from old sets, but, yeah, nowadays, they are very very expensive

@operaatio5117 Жыл бұрын

The small turntable one isn't suitable for high RPM applications, as the small bevel gear is probably gonna go flying

@in1 Жыл бұрын

Yep, but probably it won't even come to that, because the whole mechanism relies on the stud connection I built at 5:31, which can't handle high torque anyways

@cjcote3490 Жыл бұрын

I think 8 should be way higher and how did find that solution for #10 lol. Really cool

@DarkVoidIII Жыл бұрын

Excellent use of the Technic 99009co1 turntable assembly! I wonder what it would be like to use the assembly with one of the other Technic turntables? Old Technic Brick compatible turntables are numbered 2856 c01, c02, c03 - 56 tooth - and the new liftarm compatible turntables are 48452cxq or 18939c01 or c02 - 60 tooth. Very interesting, up until recently I had no idea there was a small Technic turntable assembly. I'll have to put some of those on my buy list! 😊👍👍

@in1 Жыл бұрын

The turntable with studs has the same size as the big one, so it should work the same. The new (60 tooth) turntable doesn't have a gear, which you can use to make a 2:1 transmission. Fun fact: The turntables 99010 and 58168 together are also 2:1

@DarkVoidIII Жыл бұрын

@@in1 If it has 60 teeth it itself is a gear. How you apply that depends on what you're going to use it for.

@in1 Жыл бұрын

@@DarkVoidIII What I mean is that there's no 30 or 120 tooth gear, so you can't really make a 2:1 tranmission with 2 gears

@DarkVoidIII Жыл бұрын

@@in1 Okay. What would be the closest approximation you can get to using gears you currently have on hand?

@in1 Жыл бұрын

@@DarkVoidIII If you use a 28 tooth gear (the one I used for the other turntable) it's still pretty close to 2:1, in this case 15:7

@techformsmaster930 11 ай бұрын

Steppers are what makes mechanical clocks tick, gear boxes are what allows for a car to maximize torque output to get started up (speed is converted to torque on lower gears) and then trade it for speed when that torque is no longer needed (as it switches to higher gears torque begins to be converted to speed), differentials are what allow the back wheels of a car to turn different speeds, without which either the wheels would wear down faster or the car would lose traction, I don't know, and you put the speed crank, THE SPEED CRANK, as being more useful?! The speed crank, which in part was designed because of cranky patents, and whose only two major advantages include less friction on the handle, (easily fixed with a cover sleeve) and the fact you can have a couple gears in it, allowing it to spin something twice as fast, but making it twice as hard to crank in the process.

@in1 11 ай бұрын

You're right that these mechanisms might be more useful in real life, but in the Lego context it is actually kinda useful.

@robinhood184xD Жыл бұрын

number ten is almost exactly what i use in 1 to 18 scale RC cars.

@catoperator229 Жыл бұрын

Try to create a mechanism that will double the speed regardless of whether you rotate the input or output)

@bowfuz 6 ай бұрын

Hm, interesting idea, a proof of concept video showing that any rational gear ratio is possible? Or impossible, if that's the case, but i think with differentials you can make whatever you want.

@in1 6 ай бұрын

Yeah, exactly. If you want to make a 13:7 gear ratio, you could just use the fact that differentials can 'add' gear speeds, so that you can just use binary (8:1+4:1+1:1 and 4:1+2:1+1:1) to create any n:1 reduction, and to chain them back together one ratio has to turn the reversed other one, and we have any fraction. Problem is just that turning differential-based transmissions backwards causes it to get stuck frequently, but the proof of concept exists.

@bowfuz 6 ай бұрын

@@in1 what do ya think about making a video that shows all that? Won't teach *me* anything new, but it'll definitely be cool, and maybe some people don't know about the idea!

@in1 6 ай бұрын

@@bowfuz Yeah, I'm just not sure if it would just be a clunky mess of differentials that would in theory work, but doesn't because friction is too high... But yeah, I'll maybe try around with that for a bit

@bami2 Жыл бұрын

0:47 that is a very dirty 24t gear

@cenreaper9127 Жыл бұрын

Can you please make a 4 legged walker using Theo Jansen's mechanism?

@dinhtuan752 11 ай бұрын

ok, I give to try to make that!

@dinhtuan752 11 ай бұрын

here's a 2in1 answer to this: It's hard to shrink the Jansen's linkage down to a compact walker because even if you change the ratio of the lengths a tiny bit, the walking isn't smooth anymore. So there is not much I can improve compared to the other designs on KZfaq...

@raptorwhack5970 Жыл бұрын

german engineers watching this for inspiration

@bad_game_dev_11 Жыл бұрын

The nr 9 is kinda useful for band guns or guns (Lego)

@mariovelez578 Жыл бұрын

I would have swapped the belt with chain links. Belts are pretty useless with rubber bands since they have very low friction

@in1 Жыл бұрын

Yeah, but there's no 2:1 gear combination that works with chain links. The 8-teeth gear is too small and slips, and there's no bigger gear combination where both gears work with chain links

@dinhtuan752 Жыл бұрын

but I found my combination using new gears: 20 to 40 12 to 24 Old way: 8 to (24 to 16).

@in1 Жыл бұрын

@@dinhtuan752 How would the 12- and 20 tooth gear work with a chain?

@dinhtuan752 Жыл бұрын

The new 12 and 20-tooth spurs work well but the DBG versions can't do that.

@dinhtuan752 Жыл бұрын

sorry for my late reply

@kajin807 Жыл бұрын

What's the difference between steppers and gears?

@in1 Жыл бұрын

Not much, steppers don't have constant velocity and you can't swap Input and Output

@themostoriginalyoutuber Жыл бұрын

I use the last one in every build

@bowfuz Жыл бұрын

yess, omgoodness please do get some more music going, ive gotten tired of your usual bunch and also, good building content ofc, love u lol

@in1 Жыл бұрын

I'm open for suggestions :) It's pretty hard to find background music that's neither agressive nor boring

@bowfuz Жыл бұрын

@@in1 shameless plug here but maybe a song or two of mine could fit? The channel is 9DY5ER, and off the top of my head I could best recommend Mission, and maybe Rain. If not, I'll go on a browse later to find other music.

@in1 Жыл бұрын

Nice music! I'm not 100% sure, if that's the right kind of music, though, because (I could only find rain) I'm searching for something a little bit more upbeat...

@bowfuz Жыл бұрын

@@in1 oh, my apologies. I privated Mission because of the poor quality video. I also think Particles might fit nicely! If not, I wouldn't be opposed to getting in touch on discord and I could make you your own selection for free!

@in1 Жыл бұрын

@@bowfuz Not sure about "Particles", but I kinda like "Pink". Do I get the permission to use that in a future video (with credits in the description, of course)?

@charleshulsey3103 Жыл бұрын

That last one hurts 🤕

@cendronhawk977 Жыл бұрын

You could say it's... "2:1 Bricking"!

@pifpafpoufpifpaf Жыл бұрын

What was the inspiration for the last one ?

@in1 Жыл бұрын

When I made my gear alternatives video ( kzfaq.info/get/bejne/ab2Xh5aY1N_Qm30.html ), I wondered, if there was any way to make some kind of gear ratio without gears. I spent a while researching, then I found a solution in Arglin Kampling's linkage repository (link in description) and build that linkage using Lego.

@pifpafpoufpifpaf Жыл бұрын

@@in1 whoa it's interesting ! I will look into it, particulary I wonder if all the power is transmitted or if there is cyclic loss like with a ratchet

@MuscoviteDN Жыл бұрын

From Cool to fool)))

@rowanschultz9185 Жыл бұрын

1ST and Balls.

@poulpoblup7090 Жыл бұрын

Well done

@Rainstalker Жыл бұрын

[ pee is stored in the balls in the balls ]

@iankim5395 Жыл бұрын

#8 is used a lot in Lego RC cars

@in1 Жыл бұрын

Yeah, but not as a transmission, but as a way to steer without a sliding rear wheel

@CapricornRichCat Жыл бұрын

👍👍👍

@dinhtuan752 Жыл бұрын

thanks

@Klaevin Жыл бұрын

I've used the differential in this role before, in a minugun. I've never once used a stepper, though...

@in1 Жыл бұрын

Yeah, but in most cases you can just use 2 gears as the 2:1 transmission, while the stepper has an unique movement

@EnjoyCocaColaLight Жыл бұрын

Why differentials for the minigun?

@Klaevin Жыл бұрын

@@EnjoyCocaColaLight it was in line with the axis of rotation of the minigun. So by turning the differential, the barrels spin twice as fast. I also didn't have room behind to add a Gearbox and a crank somewhere else

@EnjoyCocaColaLight Жыл бұрын

@@Klaevin Wait.. you've designed a minigun?!

@Klaevin Жыл бұрын

@@EnjoyCocaColaLight out of Lego technic, yeah. It was on a plane, kind of like an A-10 Warthog. The pilot was right behind, so I didn't have room. Edit: scratch all of that. It wasn't present on my plane. Or maybe not on the final version. But I definitely used this

@RobertoRodriguez-iw2zf Жыл бұрын

I have a problem but I summarize it better The bequeathed technic differential is very weak, I need a metal one or a replacement that won't break the teeth

@in1 Жыл бұрын

In two days I'll actually release a video about custom differentials, including a reinforced one

@RobertoRodriguez-iw2zf Жыл бұрын

@@in1 But that it occupies the same and works the same

@in1 Жыл бұрын

That's probably impossible

@Benparkinson_the_sketch_artist Жыл бұрын

Yeah gears are perfect for technology and mechanics

@fancydancypant Жыл бұрын

1:22 parents:

@mastert7601 Жыл бұрын

From useful to useless or vice versa 0:3 (look at title)

@x1roboticxs Жыл бұрын

Yeet

@BingusRepublic Жыл бұрын

@lutzherbst6885 Жыл бұрын

Also den letzten Aufbau verstehe ich aber nicht, wenn man jetzt annimmt dass das ein Getriebe ist, z.Bsp.: für ein Auto. Dann komme ich an die obere Achse ran aber ich an die untere komme ich überhaupt nicht ran - 11:01 Minute. So meiner Meinung nach ist der letzte Aufbau in der Theorie ganz gut aber in der Praxis geht er unter, also nicht zu gebrauchen... Das andere war gut!