Building A LEGO Car Not As Intended
Vložit
- čas přidán 8. 09. 2024
- I began work on this video interested to test out a unique concept for an omni-directional treadmill. However, after building and testing it, I was curious to see if the same concept could be used to create an omni-directional car instead. Making this change required some pretty big alterations to the design, but after several modifications I ended up with a novel and unique car that could manoeuvre round some tight corners and obstacles. Enjoy the video!
Marques Brownlee’s video on omni-directional treadmill:
• I Tried a Disney Secre...
This is the first time that a Lego builder actually talks to the viewers.
jamie's lego jams?
@@cf81trbI came here to say, thanks
W- WAIT NO IMPOSSIBLE!
THAT'S THE DISNEY THINGY
Oh yeah that is the Disney thingy wow that's cool
The whuh?
@@coledavidson5630 disney made a treadmill type platform for VR that can push you in any direction when you stand on it, its made of small wheels that rotate at an angle just like the one in the video
@@9_1.1 oh that's sick
🤫🤫🤫🤫🤫
So that's how those hovering thingies works in mario kart 8!
still doesn’t explain the anti gravity
@@wasp795 magnetism
@@RoxanneClimber why then do the wheels attract to the ground but repel at a certain distance?
@@bread6851 magnets can be levitated
@@RoxanneClimber yea but how can they repel and attract at he same time?
Brilliant idea to flip the "treadmill" upside-down as wheels!
Just use the chain to synchronize all the wheeltrains!
If you mean using a chain to synchronise the turntables, unfortunately that wouldn't work. I tried while I was working on it and you can't mesh chain links with the turntables because the teeth are bevelled on one side.
@@BananaGearStudios you could use a 8 teeth gears between the turntables and the chain. I think it could work.
@@BananaGearStudios You could use the old style 56 (?) tooth turntables. Those mesh with a chain just fine
I gave this a try and unfortunately it's actually not possible to properly mesh an 8-tooth gear with chain links because the teeth don't stick out far enough (even on the older-style 8-tooth gears).
I'm sure that would work using the 56-tooth turntables, it would make the car a lot bigger though.
I think the reason why it turns with more of an arch one way is because the wheel contact point with the floor is offset from the swivel point of the wheel assembly.
I love your username
The lego net piece!!! You could have the one by one studs poke through the holes of the net piece held right at either side
I love this idea! It's an absolutely great suggestion! There's still the issue of making all the discs rotate (connecting them all with 8-tooth gears wouldn't work because half the discs would spin the wrong way), but the idea is still very promising, I'll have to give that a try.
@@BananaGearStudios 😂 yeah, it would be really difficult, maybe the mini caterpillar track pieces would work with the 8 tooths? I haven’t a clue! Good job though!!
I find it cute to see little lego cars struggling on an obstacle
Now I wanna see James Bruton take a try on this principle
I remember having a mariokart 8 RC car that did the same thing for a "Hover" gimmick. The wheels would tilt downward like in the original game from an upright position and you could swap between the two.
If a Minecraft ghast had a car, it would look like this.
That is a shockingly accurate comparison
0:18 THIS MADMAN'S USING A WII NUNCHUCK TO STEER A 360° TREADMILL/THE DISNEY VR FLOOR THINGYAMABOBBER
This is absolutely brilliant, however, I wonder whether it might not be better to use coupling rods like those that connect the driving wheels on steam locomotives instead of gear trains to reduce backlash and prevent the slipping of teeth...
Great video! Love that sometimes you have to take a project and flip it in it head!
Well done
Weirdly I had this idea years ago and built essentially the same setup, but your implementation is much cleaner. Very cool!
Pretty cool what you can do even with the limitations of lego
There's something tranquil about a lego storm trooper surfing around on a platter that's being spun by a series of satellite dishes
nice build! great work :D
Thank you!
It's so derpy. I love it!
This would be a super cool Star Wars Droid companion 😍
I would use tie rods between adjacent wheels for the steering axis and in both directions held square. This will give it the effect of tie rods on a locomotive to transmit motion without backlash. It can tend to twist though so i would only use it to remove the backlash from the driving gears. You can still have the motors and control unit above the base by undoing the linkage leaving a sandwich with the middle layer free to move, then secure the top and bottom layers together with a C shaped bracket.
As an edit, it's not removing backlash so much as equalizing it as you've done here by centralizing the main drive shaft. With gears alone, this suffers from a single point of failure, however, and so the tie rods would help prevent that.
This is an amazing concept!
Your videos are extremely good!
Thank you so much! I love your videos too! I'm really glad you managed to get your channel back up on CZcams again.
@@BananaGearStudios Thank you! You are one of the few ones that noticed that my channel was gone!
That’s what’s called a SWERVE drive in FRC. Normally the wheels aren’t tilted down like that though.
Edit: not really actually as with SWERVE each wheel is driven and steered independently but you’ve linked them here
In old-school lingo, with all wheel directions connected together, this is a crab drive
It is pretty similar, but it obviously can't turn the actual frame or x-brake like swerve since the wheels are linked
My Vex U team did differential swerve for a while. This is kinda similar.
A lot of teams did “swerve” this way.
118 robonauts from at least 2006-2008 did swerve where all wheels were chain driven and they ganged a heck ton of motors into one giant gearbox to drive the thing. It was brilliant engineering.
Now thats what I call omnidrive
you could use one continuous chain along the outside to control the rotation, then just power it on one side, and tension it on the other side
The problem is that Lego chain links don't mesh with the turntable pieces because their teeth are bevelled on one side, otherwise I would've definitely done that.
Use a chain to minimize backlash. Get rid of all those excess gears.
this robot idea might work better as a tripod
this is the disney omnidirectional floor tech
Now make 3 more, then use those 4 as wheels for a bigger car!
“Task failed successfully 😭🙏”
I think a servo motor for the rotation would be more convenient
you should put a different color for the block thats above the wheels to see where its going to turn
In the real world, the first concept has more advantage I think - you don't need to get torque to a rotating mechanism, especially without them interfering with each other. Instead, you just need a swash plate or CV/uni joint as you had for each wheel and some uniform actuation with linkage, and virtually no backlash issues.
I definitely agree that the first version has some benefits. The main drawback that led to me going with the later design was that, as you tilt the wheels, the car gets raised up off the ground a bit. Which means that once the full car was built the tilting mechanism would have to be very strong and robust to lift the car off the ground every time you want to change direction.
@@BananaGearStudios I wonder if you could design a mechanism that pivots the wheel about the contact point, wherever in the circumference it may be, to lift the rest of the wheel off the ground and keep the ride height of the vehicle static
I honestly can see an application for an omni-directional rover in clean room manufacturing settings. I'm trying to imagine a practical application for the angled wheels, does it make manufacturing easier?
Idea to potentially remove all the backlash: Wrap a Lego chain around the outside of the gears.
The problem is that Lego chain links don't mesh with the turntable pieces because their teeth are bevelled on one side, otherwise I would've definitely done that. Several other people suggested the same thing, so I probably should've mentioned in the video why it wouldn't work.
@@BananaGearStudios Ah, that does explain it. Thanks!
Would perpendicular driveshafts solve the backlash issue?
the camber on this bih
Good now make a great ball contraption out of it
with the wheels on a fixed angle it's basically swerve drive, just with the wheels at a funny angle, still cool though
edit: if i watched 10 more seconds of the video i would've noticed that you already pointed this out xD
love it. can you try and build a unicycle with gyroscope? thanks :)
Why didn't he use sprocket chains to get rid of both backlash and slippage? He'd only need like 3 or 4 chains to sync everything as well as have adjustable tension to get rid of some of the resistance of using a gear train.
Thanks for the comment, but I tried that while working on it, and unfortunately you can't connect chains to the turntables because their teeth are bevelled on one side. So to use a chain I would still have had to mesh each turntable with at least one gear, and then connect these gears to spur gears above which I could drive with a chain. I thought about this while building it, but ultimately from that point using more gears was the simpler solution and also let me gear down the motor more.
Ooooooh, yeah that makes sense. Thanks for the response, I was genuinely curious lol.
I hoped to see you use the original idea, not a simplified one. Its an exciting one. If only you could have two pairs of such swaying mechanisms, it would steer like a tank and be omnidirectional. Now its sort of omnidirectional, or in other words it just turns really well
at 5:45 that's exactly what I was thinking!
Use a chain to connect the wheel directions
Hey! 3rd subscriber here, I am so amazed you got this far! You've been doing quite well with your channel!
Wow, thank you so much! That means a lot to hear!
@@BananaGearStudios No problem!
Put that assembly on a Roomba and it'll stop getting stuck as often
Why not use chains to connect each of the turntables directly? You just put one loop of chain going around the entire body of the car, it’ll drive all of the turntables the same way, and you can drive the chain from another gear that might be used to tighten their connection. Less slipping, less backlash, etc…
The problem is that Lego chain links don't mesh with the turntable pieces because their teeth are bevelled on one side, otherwise I would've definitely done that. So the options would have been to either use the much larger turbtable pieces instead which don't have this issue, but it would've made the car way bigger, or to mesh the turntables with gears and then drive those gears with a chain. I considered that, but ultimately it was simpler to just use gears the whole way through. Should've probably mentioned why chains wouldn't work in the vid.
@@BananaGearStudios oh really? I had no idea the turntables were any different from regular gears
Nice build bro.. 😃
Now rotate it (change the direction it faces).
What if you use like a bar to turn them(like you did in the demo)
Add car rotation next
As you're driving it on your kitchen floor, the movements remind me of Michael Jackson....
4:00 next @jamesbruton omnidirectional robot.
Do you have a discord? I can send some other swerve drive styles to you! I’ve been waiting for someone to make this style of swerve drive for a while. Also, it’s mostly easier to do a traditional vertical-wheel swerve drive.
Does the platform move or is "north" always "north" as you turn. It looks like the top is always pointed to the top no matter how you turn the wheels. Weird?!?
SHMOOVIN'
That's from Disney Walt company
0:32 is insane
So hog drive but using a disk instead of half a ball
i see camber on thumbnail i click
great! youre so goood
A more conventional drive train is more efficient/reliable, but I could imagine something like this made with dedicated components and independently controllable wheels (for turning on the spot) being a retractable assembly on some motor vehicles.
Hypothetical American Karen with the latest rubeMobile/land yacht: “Awww, struggling to parallel park? You should get a retractable omni-carriage you peasant!”
Yeah, I was thinking about making the wheels move independently, but ultimately it would've needed too many motors. But like you say, I'm sure it could have some interesting uses.
now try it with only two wheels for steering
why not trying chains?
Scrapman reference
you intended so, but sphere 360 wheel car is better. even the upright 360 wheels are more predictable.
They might be more predictable, but they don't look as cool!
I wish i had lego thecnic peices to do these but they are far too expensive.
It might not be as expensive as you think. I thought the same thing until I went to bricklink and made myself a list of the gears, rods and other parts I thought I would need. Most pieces there only cost a few pennies (while others, yes, can cost $0.50-$1.00 or more). Pare down what you think you need and start building. My first shipment was 150 items and cost me $19.00, 2nd one was 135 items at $25, 3rd was 1362 items that cost $130 (prices include with shipping). *Do the math* and see what it is per piece. That included gears, axles, liftarms (so many liftarms), turn tables, pins, bushings, frames, pin connectors, hubs, chains, rubber bands, and Gear Differentials. Get everything in the cheapest color, it's a steal.
I started with two small 15 year old sets I had broken up in a box and now I try to build some of the contraptions I see on here. Try it and reply back here when you do. Good luck!
@@tomsko863 thank you for the advice ill look into it
Yeah, most parts on Bricklink are surprisingly cheap, it's normally only rare parts or parts in rare colours that are quite expensive. I always buy in the cheapest colours, and usually go for used parts because they almost always end up looking as good as new ones.
Holotile transportation
Funky
mario kart 8 ainti gavity wheels
4th comment wow
ᵇʳᵘʰ
I need Elon Musk to make cars that operate like this on the road.