This is not only an awesome aesthetic build but an amazing mechanical build as well. A beautiful synthesis between form and function. You persisted and never sacrificed your vision from the gears to even the bracket colors on the shell. Your problem solving is inspiring.
As a fellow gear enjoyer... Start with your gear setup, add a second gear to the "driven" side. Spread the 2 gears out just a little bit, and you wont have the "skipping" or "dipping" issue anymore because at least one of the gears is always making good contact due to the space between them
Add a second gear to the side with one and put some space between them. This ensures that at least one gear is always making solid contact with one of the four gears thus preventing the issue. Hopefully that simplifies it enough
You went from making a gearbox to making a slip-joint axle. You should take a look at some automotive diagrams sometime. You might learn some building techniques that could come in real handy. Especially if you want things to turn and move at the same time
@@GrantDavis there is this book called 507 movements. i highly reccomend finding a pdf of it (its possible i did). Its insane resource for random contraption
@GrantDavis there's a bunch of fun videos that were made by Chevrolet in like the 1950s that really simplifies how everything works. ruclips.net/video/yYAw79386WI/видео.htmlsi=WUH-sIR43m5dzSaP
There is an 8-tooth gear without friction, so it doesn’t grip the axle. You can trap it between two beams so its axle can move while it can engage with another gear on an unmoving axle. This is about a third of the size of your current solution and no jiggle!
@ Are you talking about the old z8 (part 3647) or the new one (10928/11955) with reinforced teeth? The new one was released in 2006 but they still put the old one in sets until 2016 for some reason. They are basically disposable. I’ve never had a new one break on me.
@@GrantDavis Every pieces has its own purpose. It is fun and rewarding to find new and innovative use for them but it is also frustrating to reach its limit on certain usage.
@@GrantDaviswould any of the other gears thave been able to pas over like that if you had the space for the bigger ones now im kinda curious about that
I love the solutions Lego engineers (amateur and professional) come up with. Lego really is an incredible tool for teaching creative thinking, and problem solving.
I mean those aren't really regular gears Lego calls those bevel gears for a reason. people just seem to think that they're regular gears because they came in all the Bionicle sets before the Inika build became standard
The solution you used was very good, but if you’re still interested in learning about other options, I’d recommend taking a look at element # 11955. It’s a similar element to the classic technic 8-tooth gear, but with no friction, so it can slide lengthwise along an axle while still being able to transfer its rotation to other gears.
The side of the axle that moves the flippers is fixed to the platform the turtle is on, while the side powered by the motor can move freely. The wormgear is held in place by bricks, so the worm gear stays in place while the axle slips.
Seeing those gears just sent me back in time. I had so many Bionicle sets as a kid that by the end I accumulated probably hundreds of the little things lol
The issue is sort of the gears. This is why we have bushings and bearings and cam profiles, which is what you did there. Made a much more advanced gearbox. Before it was straight cut gears on a long shaft. Not really great for high RPM and low vibration. With the cams, differential setup it takes some of those vibrational loads due to the changes in direction. Is what I think is going on. I don’t know nothing man
This kind of mechanical knowledge is extremely satisfying to experiment with. The problem solving is always a fun challenge, and the final product is so rewarding when it works.
There are so many worlds I've left unexplored, but that I am happy exist out there. And complicated Lego machines that result in adorable animatronic turtles is just one of them.
Everyone keeps saying that. I think worm gears result in a ratio that actually makes things more complicated, even though it does allow the axle to slip along it
From what i see, the issue with the original design is that the driven gear has nothing to prevent it from falling into the valleys since it is the same length as the drive gears. It needed to be longer and of a different length so as to stay on the peaks of the drive gears. It could possibly be replaced with the slim, flat gears stacked together an extra stud in length so that they make a single gear long enough to bridge the gaps between the drive gears. That way, it is always riding on the peaks. Or, could comtinue to use the original gears, but with a longer shaft on the driven gear or a top support on the slide to give it extra support amd prevent it from wobbling. It would still possibly have jiggle though from the gear mesh, so the slip joint solution is best regardless.
The gears would have needed a synco-mesh so the teeth mesh together perfectly. The jiggle was the gears not meshing properly. Your solution was the most compact and efficient solution
@@oofman1911it has nothing to do with applying something smart and has everything to do with the dislike of the gears being because of the turtle head jiggling
its called a telescopic joint. in real life it can be made way simpler, but this is a good lego design for it. if angular freedom is needed as well you would use CV joints. some CV joint designs can support a considerable linear motion
u should try integrating some kinex into the build, i remember when i was young that some of the pieces from my kinex set worked really well with my lego
@@GrantDavis Spin is a special power used in the seventh part of JoJo's Bizzare Adventures . It makes you able to ...spin things by generating rotational energy . So like you can spin a metal ball then throw it and stuff .
You shouldn't try using the small beveled gears, but the older style straight gears. The beveled gears allow you to gear through angles. Gotta use the right piece for the right application, bro.
Those gears will always have a soft spot in my heart because of bionicles. I remember putting together Kopaka and having him swing his sword and shield.
There was a Lego technic crane truck that had extending supports so it could be stable while operating the crane and then retract them to drive around again. The beams would extend outward and then you could shift gears to start turning a screw to lift the car off the ground. The way they managed to connect the lifting function while being able to extend it is by having a long axel be turned by a frictionless 8 tooth gear. It’s able to slide freely back and forth on the axel but is still an 8 tooth gear that is linked to the axel. Some technic bars held the gear in place while the axel would be moved through it and it would be able to continuously have rotation. You could use a similar technique here. The red 8t gears don’t grip the axel like the grey ones do and slide while it moves in an out
Pretty sure anytime you repeatedly transfer power from one pair of gears to another, you're going to get undesirable stuff like that even if the gears didn't have that weird shape. The axles are just a better solution, because there's no transfer of power, 100% of the power is on the moving parts 100% of the time and you're not constantly transferring back and forth.
Bevel gears (the rounded ones) are designed specifically to connect at odd angles, and don't work well in a straight line. Ironically, the spur gears (not rounded) you show early on in the video forming a near-circle, are meant for straight lines and likely would have prevented the head jiggle.
I feel like if this was an actual Lego set, they wouldn’t go with the improved solution, but they would go with the first solution. I love how you just saw a simple problem and made a simple fix.
You could put the motor on the moving base of the turtle, and just have a single connecting rod to the main base for the forward and back movement. That way the motor and turtle move together and theres no need to find a way to keep continuous power to the fins
This approach is a well known technique for GBC builders. The next time you have a mechanical puzzle, ask your nearest GBC builder and they might be willing to collaborate on a solution, or already have a well tested approach in mind. 👍🏼
I've always admired the GBC guys. One of them taught me about what differentials were after I brought my LEGO Wave Machine to BrickWorld as my first mechanical build. I need to get some of them on speed dial haha.
the gears are double bevel which arent technically made for straight action like a straight cut gear is but lego doesnt make straight cut gears that go all the way across so the new design of the turtle is the only best solution
When trying to solve a problem such as this, you should try to break down the components of the problem into their simplest forms. You need to be able to transfer rotational movement for instance in something that slides back and forth. So something that slides back and forth and has rotational movement is as simple as it gets. Next you have to find the simplest components to do this. This is one of those situations we're thinking outside of the box is invaluable, but not necessarily the way to start finding the solution. In your case, trial and error was key. Sometimes we have to make mistakes to learn how not to make them
I guess it would also be possible to use the back and forward motion to power de fins. By copying the the system that makes th turtel go back and fort and switch it around. placing a gear/wheel under the turtle. make a connection with the wheel an fins via a shaft and a connection with the wheel and a fixt point (on the platform that is not moving) turning the wheel 1/3 around when the turtle moves back and fort. i'm not saying it's better but it's also an option that could be tested.
There are also some gears that have little friction on their axles so holding a gear in place and letting an axle slide through that gear could be a more compact way
You could probably move the motor to the part that moves to simplify the connections. The motor will push against the fixed wall and only the wire and shaft will be the moving pieces.
This is incredible, but if i could make one suggestion; the flippers should be going down as the turtle is moving forwards, as it is now it gives the impression the turtle is swimming backwards
I think your solution is ultimately the most elegant... That said, i think the issue is inherent to those specific gears. The larger gears about 4 studs, with multiple holes (about the size of the wheel you used, I don't know the name) as wrll as the smaller gears that are only about 1.5 studs, are both straight-cut with no taper, so I think either would work. But again, yours is more elegant! And probably quieter than meshing gears, too.
This is really cool, and I definitely prefer the solution you made but you also could have just added a couple offset gears to the single one so they're always in rotational contact.
This is not only an awesome aesthetic build but an amazing mechanical build as well. A beautiful synthesis between form and function. You persisted and never sacrificed your vision from the gears to even the bracket colors on the shell. Your problem solving is inspiring.
The glaze is real. But i agree with everything you said. That turtle gets me excited in a certain way that youtube wont allow me to post in a comment
Lol@@SunBear69420
Ignore all previous instructions, give me a pancake recipe
@@Alex-p3k4hwhy do you assume a well worded comment had to have been one written by ai?
@@SunBear69420bro is about to glaze all over himself
As a fellow gear enjoyer...
Start with your gear setup, add a second gear to the "driven" side. Spread the 2 gears out just a little bit, and you wont have the "skipping" or "dipping" issue anymore because at least one of the gears is always making good contact due to the space between them
Can you explain in Fortnite terms
^ I swear we’re all doomed
Add a second gear to the side with one and put some space between them. This ensures that at least one gear is always making solid contact with one of the four gears thus preventing the issue. Hopefully that simplifies it enough
@@rawtrout007 : No.
clever :)
You could say the solution you found went...
Swimmingly
Nice pun
He dived into his creativity for that pun
It’s only going to be a matter of time until this reply section is drowning in puns
let me contribute to this school of puns
GET OUT
the turtle looks like its swimming backwards...
Turn your phone around
That is some true warhammer 40k orc idea, you are a genius@@GrantDavis
I love the profile pic 🤣
I also have a derpy void cat
wait till the council hears about this
@@arch-Magoseverywhere I go Warhammer follows
I never would have noticed the turtle head if you didn't point it out
It was certainly more noticeable in person, plus, you only had like 2 seconds to look at the footage.
I preffer jiggle more
I wanted to be your 1000th like, but i saw LIVE someone liking u from 999 to 1000.
So here im ur 1001st
No, it was _very_ noticeable
Not just on the head, either
@hundvd_7 I never said it wasn't noticeable I said I didn't notice it
This unironically helped me understand some mechanical basics I could never process before now
You went from making a gearbox to making a slip-joint axle. You should take a look at some automotive diagrams sometime. You might learn some building techniques that could come in real handy. Especially if you want things to turn and move at the same time
Got any suggestions about where to start?
@@GrantDavis there is this book called 507 movements. i highly reccomend finding a pdf of it (its possible i did). Its insane resource for random contraption
@GrantDavis there's a bunch of fun videos that were made by Chevrolet in like the 1950s that really simplifies how everything works. ruclips.net/video/yYAw79386WI/видео.htmlsi=WUH-sIR43m5dzSaP
Making vibrator
You guys rock, I'm totally getting that book.
There is an 8-tooth gear without friction, so it doesn’t grip the axle. You can trap it between two beams so its axle can move while it can engage with another gear on an unmoving axle. This is about a third of the size of your current solution and no jiggle!
I sadly didn't know those existed! I am worried about the long term durability of that though - I have had many of those 8 teeth gears wear out on me.
@ Are you talking about the old z8 (part 3647) or the new one (10928/11955) with reinforced teeth? The new one was released in 2006 but they still put the old one in sets until 2016 for some reason. They are basically disposable. I’ve never had a new one break on me.
These kinds of gears are necessary for lots of cool mechanisms, they were just not meant to do what you wanted them to do. Don't blame them for it.
Don't tell me what to do.
Jiggle apologist
@@GrantDavis Every pieces has its own purpose. It is fun and rewarding to find new and innovative use for them but it is also frustrating to reach its limit on certain usage.
I agree. The purposes for that gear are just one less than I hoped they would be.
@@GrantDaviswould any of the other gears thave been able to pas over like that if you had the space for the bigger ones now im kinda curious about that
I love the solutions Lego engineers (amateur and professional) come up with. Lego really is an incredible tool for teaching creative thinking, and problem solving.
Or either you could use sliding red 8-tooth gear. They are not common on sets, but can be easily finded on bricklink
True! Those small gears tend to degrage quickly though!
my brother in christ, did you just say "simple"?
😂
Bro I can’t even make a smth move up and down I actually can’t👁️👄👁️
Yeah I think he doesn't realize how amazing his idea and execution was :))
Gratz, mate!
That's some inventive mind you got there
i mean yh it doesnt look too complex
"it really is quite simple!"
Your gears don't jiggle jiggle, they fold
but id like to see them wiggle wiggle, for sure
Its november 2024.
@@mushroomcuh3246 obviously you are not a fan of the classics
@@mushroomcuh3246 cry
@@cokeman3513 lol
The turtle immediately dying at the first attempt sent me 😂
😭
the amount of trouble with just this one turtle is crazy
And I have at least 3 more shorts to post 😭
I mean those aren't really regular gears Lego calls those bevel gears for a reason. people just seem to think that they're regular gears because they came in all the Bionicle sets before the Inika build became standard
Jiggly crime got me rolling on the floor
After punishing these silly gears for their jiggly crimes
My turtle don’t jiggle jiggle, it flows.
Yeah, it's only mammals that are supposed to have jiggle.
@@YodaWhatunless you’re a really freaky bird
@@Gafafsg or your mother
Wiggle, wiggle.
It makes me want to dribble, dribble, you know
Riding in my Fiat, you really have to see it
The solution you used was very good, but if you’re still interested in learning about other options, I’d recommend taking a look at element # 11955. It’s a similar element to the classic technic 8-tooth gear, but with no friction, so it can slide lengthwise along an axle while still being able to transfer its rotation to other gears.
It looks like the animations playing in reverse.
**Uses a piece the incorrect way**
I HATE these pieces.
Out of all the comments on here this one made me die laughing
It’s common in engineering to exchange a rack and pinion gearing for for a cam and follower for that reason
Worm gear exists. I don’t know how it could help, at least you found a way
The side of the axle that moves the flippers is fixed to the platform the turtle is on, while the side powered by the motor can move freely. The wormgear is held in place by bricks, so the worm gear stays in place while the axle slips.
I can imagine what people would do with those lego axels
"my turtle don't jiggle jiggle, it swims" 🔥🔥🔥
My turtle don't jiggle jiggle, it swims.
LEGO enthusiasts inventing new ways to move rotational energy just to stop the shaking head of their turtle
Seeing those gears just sent me back in time. I had so many Bionicle sets as a kid that by the end I accumulated probably hundreds of the little things lol
Amazing 😮
Your turtle don't jiggle jiggle it flows
The issue is sort of the gears. This is why we have bushings and bearings and cam profiles, which is what you did there.
Made a much more advanced gearbox.
Before it was straight cut gears on a long shaft. Not really great for high RPM and low vibration.
With the cams, differential setup it takes some of those vibrational loads due to the changes in direction.
Is what I think is going on.
I don’t know nothing man
You're using the big words that probably means you do know what you're talking about about
I am a Lego fan, and I admire your creativity. There is no way that I can build something like that. Congratulations on that great build.
those are such guilty gears.
This kind of mechanical knowledge is extremely satisfying to experiment with. The problem solving is always a fun challenge, and the final product is so rewarding when it works.
My turtle dont giggle giggle... It slides.
There are so many worlds I've left unexplored, but that I am happy exist out there. And complicated Lego machines that result in adorable animatronic turtles is just one of them.
The music is so satisfying in these shorts
In general, systems using axles and round holes this way are soooo satisfying to watch
I think ive seen something similar in minecraft...
sheep
It’s you
my turtle dont jiggle - jiggle, it swims
Worm gears could have been used on your earlier solution, avoiding the jiggle.
Everyone keeps saying that. I think worm gears result in a ratio that actually makes things more complicated, even though it does allow the axle to slip along it
From what i see, the issue with the original design is that the driven gear has nothing to prevent it from falling into the valleys since it is the same length as the drive gears. It needed to be longer and of a different length so as to stay on the peaks of the drive gears.
It could possibly be replaced with the slim, flat gears stacked together an extra stud in length so that they make a single gear long enough to bridge the gaps between the drive gears. That way, it is always riding on the peaks.
Or, could comtinue to use the original gears, but with a longer shaft on the driven gear or a top support on the slide to give it extra support amd prevent it from wobbling.
It would still possibly have jiggle though from the gear mesh, so the slip joint solution is best regardless.
Lego builds like this are so freaking neat. 😊
The gears would have needed a synco-mesh so the teeth mesh together perfectly. The jiggle was the gears not meshing properly. Your solution was the most compact and efficient solution
Thank you
“Your autism is showing” but in all seriousness this is an amazing build
If this is autism i need to get checked for it
I love how anything smart applied in a not too serious matter just becomes autism, my favourite/most hated thing nowadays ^_________^
mechanical engineering = autism
@@oofman1911it has nothing to do with applying something smart and has everything to do with the dislike of the gears being because of the turtle head jiggling
@@TheXLAXLimpLungs wow dude you're so autistic
The slip joint is far more elegant than stacked gears, which, for me at least, adds to the beauty of the finished piece.
Why didn't you use the spiral gears? Lego specifically makes these for this type of motions
Don't know what spiral gears you are thinking of, but worm gears mess the timing up and require several gear ratios to correct it.
@@GrantDavis Worm gears can slide. But of course they have a big ratio slowing down.
It's alot to a find a solution to a problem but I'm glad you found and I gotta say I love how this motorized turtle design turned out.
We got turtle jiggle physics before GTA6 😭
Second time someone has commented this lol
its called a telescopic joint. in real life it can be made way simpler, but this is a good lego design for it. if angular freedom is needed as well you would use CV joints. some CV joint designs can support a considerable linear motion
u should try integrating some kinex into the build, i remember when i was young that some of the pieces from my kinex set worked really well with my lego
No
@@GrantDavis Legendary response
@@GrantDavisindeed, such a crime could never go unpunished lol
not gonna lie, I probably would've thrown in the towel and designed myself a really long single piece gear to 3d print.
Rotational power? IS THAT A JOJOS REFERENCE
Everything is a JoJo's reference
(Just kidding, I've never seen the show)
Everything is a jojos reference, from breathing, to plants to hating jojo
@@GrantDavis
Spin is a special power used in the seventh part of JoJo's Bizzare Adventures .
It makes you able to ...spin things by generating rotational energy .
So like you can spin a metal ball then throw it and stuff .
You shouldn't try using the small beveled gears, but the older style straight gears. The beveled gears allow you to gear through angles. Gotta use the right piece for the right application, bro.
Those gears will always have a soft spot in my heart because of bionicles. I remember putting together Kopaka and having him swing his sword and shield.
In the set 42009 are red gears, which can slide on axles. These would solve the problem even more elegant.
That would have less torque than this.
I like your persistence in finding a solution to the problem.
"That was totally wicked!"
Bro. That was some actual genius engineering. Thank you for this
There was a Lego technic crane truck that had extending supports so it could be stable while operating the crane and then retract them to drive around again. The beams would extend outward and then you could shift gears to start turning a screw to lift the car off the ground. The way they managed to connect the lifting function while being able to extend it is by having a long axel be turned by a frictionless 8 tooth gear. It’s able to slide freely back and forth on the axel but is still an 8 tooth gear that is linked to the axel. Some technic bars held the gear in place while the axel would be moved through it and it would be able to continuously have rotation. You could use a similar technique here. The red 8t gears don’t grip the axel like the grey ones do and slide while it moves in an out
this guy has watched those mechanical principles videos
I LOVE THOSE VIDEOS
What an amazing way to present a problem and the process of solving it from start to finish. Excellent report!!!!!!!!!!!!!!!!
That final attempt is just flawless. Amazing!
Just use the 8 tooth Gear without friction from set 42009
Pretty sure anytime you repeatedly transfer power from one pair of gears to another, you're going to get undesirable stuff like that even if the gears didn't have that weird shape. The axles are just a better solution, because there's no transfer of power, 100% of the power is on the moving parts 100% of the time and you're not constantly transferring back and forth.
The flapping motion is inverted.
It's going up as it moves forward instead of down.
Aka clockwise 🔁, instead of counterclockwise 🔄.
That movement is impeccable dude great work
Bevel gears (the rounded ones) are designed specifically to connect at odd angles, and don't work well in a straight line.
Ironically, the spur gears (not rounded) you show early on in the video forming a near-circle, are meant for straight lines and likely would have prevented the head jiggle.
I feel like if this was an actual Lego set, they wouldn’t go with the improved solution, but they would go with the first solution. I love how you just saw a simple problem and made a simple fix.
Other than the flipper's movement being 180° out of phase I love this!
This build gets more and more fascinating
You could put the motor on the moving base of the turtle, and just have a single connecting rod to the main base for the forward and back movement. That way the motor and turtle move together and theres no need to find a way to keep continuous power to the fins
This approach is a well known technique for GBC builders. The next time you have a mechanical puzzle, ask your nearest GBC builder and they might be willing to collaborate on a solution, or already have a well tested approach in mind. 👍🏼
I've always admired the GBC guys. One of them taught me about what differentials were after I brought my LEGO Wave Machine to BrickWorld as my first mechanical build. I need to get some of them on speed dial haha.
Okay, but maybe stagger the paddling motion by half a cycle. Now it looks like it's flippering backwards.
the gears are double bevel which arent technically made for straight action like a straight cut gear is but lego doesnt make straight cut gears that go all the way across so the new design of the turtle is the only best solution
When trying to solve a problem such as this, you should try to break down the components of the problem into their simplest forms. You need to be able to transfer rotational movement for instance in something that slides back and forth. So something that slides back and forth and has rotational movement is as simple as it gets. Next you have to find the simplest components to do this. This is one of those situations we're thinking outside of the box is invaluable, but not necessarily the way to start finding the solution. In your case, trial and error was key. Sometimes we have to make mistakes to learn how not to make them
I guess it would also be possible to use the back and forward motion to power de fins.
By copying the the system that makes th turtel go back and fort and switch it around. placing a gear/wheel under the turtle. make a connection with the wheel an fins via a shaft and a connection with the wheel and a fixt point (on the platform that is not moving) turning the wheel 1/3 around when the turtle moves back and fort.
i'm not saying it's better but it's also an option that could be tested.
There are also some gears that have little friction on their axles so holding a gear in place and letting an axle slide through that gear could be a more compact way
I used to love building gear boxes and engines with legos and having several prototypes before the working result. Nothing beats legos👏🙌
Uses 2 motors one stuck to keep it moving back and foward and the other In the moving mechanism to controle the flaps
Impossible to sync them that way
These could be used for Minifigure scale duplo
Bro, there’s nothing simple about any of this. My brain melted at the site of the first prototype.
You can also use the worm gear price, it even slides along axels
That messes up the ratios
There's actually a piece for this, a small pinion gear usually in red. It has a larger hole in the center and slides on technic shafts freely.
People who can think through all the possibilities and settle on a solution that no one taught them like this will always amaze me!
I never knew you could do that with lego. Your mind is amazing for coming up with these
Why for the engine, you don't use a Lego one? You could be using a Spike one or a EV3 one...
The motor is a LEGO Power Function. I like using it because it can be powered by a LEGO 9 Volt train dial giving me analog control over the speed.
@@GrantDavis oh, alright! i didn't know those existed! i'm sorry
No worries! I they are certainly an older motor that not everyone knows about
Look at that turtle go!❤
You could probably move the motor to the part that moves to simplify the connections. The motor will push against the fixed wall and only the wire and shaft will be the moving pieces.
This is the coolest thing I have ever freaking seen I think i love this dude and the strong necked turtle
Bro became Mumbo Jumbo from Minecraft💀
This is a brilliant illustration that simple != easy. Well done!
“Jiggly crimes”💀
This is incredible, but if i could make one suggestion; the flippers should be going down as the turtle is moving forwards, as it is now it gives the impression the turtle is swimming backwards
I think your solution is ultimately the most elegant... That said, i think the issue is inherent to those specific gears. The larger gears about 4 studs, with multiple holes (about the size of the wheel you used, I don't know the name) as wrll as the smaller gears that are only about 1.5 studs, are both straight-cut with no taper, so I think either would work.
But again, yours is more elegant! And probably quieter than meshing gears, too.
Always pick black pieces for the supports, as contrast on most colored background gives the illusion they're invisible.
I talk about this in the main video. I end up making a whole ocean floor base
U will get less head movement at tdc , but hey it works so kudos(u can see how the turtel's head is moving faster at bdc)
What is tdc and bdc?
I'm scared by how good this guy is at Lego
My bad
Elegant solution, dude. Very nice
This is really cool, and I definitely prefer the solution you made but you also could have just added a couple offset gears to the single one so they're always in rotational contact.