XXL LEGO Go-Kart! | Motors & Brakes | #2 - Mantis Hacks
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- เผยแพร่เมื่อ 13 พ.ค. 2020
- My latest 3D Printed project is this GIANT LEGO Go-Kart large enough for me to ride! Yes I'm hoping this time that this version will be big enough for me to ride! In this video I strengthen the chassis construction and start testing motors, batteries and a VESC speed controller.
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If this could be mass-produced as a kit and sold in a DIY assembly, literally take all of my money out of my bank account.
Love your work Matt.
😆 thanks 👍
~insert the fry meme~
Technically he could, at this scale, if no one have done this before, it's expensive but he could sell it a good price. Keep going dude
Try using two motors and split the drive shaft that should help the steering and you can control them to lock and add a drift mode
Yeah.. my plan is add second motor... And if it doesn't steer split the axle and make an electronic differential by monitoring the steering angle 👍
Need two brakes to properly do a split axle.
@@MattDenton would it be possible to add ackerman angle to the steering? Might help with the turning situation. Also, it might make sense to either print the tires in tpu or print molds and do a urethane casting.
Yeah I could do a urethane mold...
@@deanmcmullen5982 you can adjust the material properties of cast polyurethane to get an ideal hardness
Its terrifying to see such big lego bricks, messes with my brain
Yeah 😆
They're actually normal sized, Matt's just secretly tiny.
They're not even to full ratio.
Lego to Human scale is 3.5 Studs per meter. So a brick that's 7 studs long, blown up to proper scale, would be 2 meters long.
@@carumsarene I would love to see him do one that scale (Though if you do Matt don't use a 3d printer laser cut/cnc the faces of each brick in sheet material - it will be so much quicker and with proper solvent welds durable). Are you basing that estimation on Lego minifig though? Not saying it sounds wrong for Lego minifig scale just curious as lego's Human figures are none of them particularly 'scale' or consistent to each other - and surely the Lego Technic people would be the best reference for this build. I don't have one of those handy but I'd say its probably around 7 studs per meter scale from memory.
I've tripped over one!!
Uhuh Ivan Miranda you say? That's super exciting 👍👍
Yeah 😆
Matt: *has 44k subs *
Also Matt: *replies to almost everyone's comments *
I do try.. I appreciate the feedback 👍
Like a boss
I know right?! I personally enjoy it. It means that the youtuber is one of the nicer ones.
8:33 My OCD kicks in, then I notice that the front 4 wheels don't align either lol
Not a criticism by the way, I think this project is awesome :)
Thought the same thing, immediately seeing if anyone else noticed.
I'll line them up for ya both 😆
@@MattDenton Wheely good of you sir, thank you.
I get tyred when I see things like this, they tend to accelerate my OCD, but you my good man quickly changed gears which in turn allowed me to apply the brakes, stopping it from getting out of control.
Not many TH-camrs offer differential treatment for people like myself but it allows us to tread more carfully to our destination, anyway, enough gassing, I am getting exhausted.
Btw, Judging by the quality of your work I am sure it is something you were well aware of already :)
P.S, I snuck a pun in there somewhere, I think I was pretty crafty but you may be able to spot it!
I watched this & automatically thought that I'd have the monopoly on tread pattern ocd; then I scrolled through the comments only to find that I'm not unique;.....wtf!!
Next somebody's gonna tell me that I'm not special either 😭
@@samuelbeckett4632 Nah, I saw it but I'd noticed Matt take care to get it right earlier so I was like "at some point he'll take a wheel off and fix this"
I was smiling through your whole video as I truly appreciate the engineering you have clearly applied to this and other models. I like the needle bearing washers, I'd never thought of adding them to the inner faces of the wheel. I'm sure them ninjaflex wheels expanded at full speed too. Keep enjoying.
The tyres do expands at full speed and spin on the rims :D
Truly amazing. As a former machinist, what you did with that shaft wasn't exactly orthodox, but it was ok, especially if you clamped down the lego blocks at the end.
Yeah it was a terrible idea as I say in the video :D but I was being impatient so wanted to give it a go. It was clamped down but the lathe was not happy doin it.. as you can imagine... that why I say don’t try this at home :D
Man matt is smarter than everyone here on Earth
You, James Bruton and Ivan Miranda are the triumvirate of insane 3d printed mechanical builds. When we're allowed out again I'd love to see a 3-way collab between you all, it would have to be some kind of... robot LEGO tank? Maybe the famous 8862 pneumatic JCB?
Yeah that would be great!!! I'll contact them ..
Awesome as always! Looking forward to the next part!
This is what LEGO is about.
I love it , when I was a kid in Brazil back in the 60's building blocks was one of my favorite things, we didn't have Lego "not that I remember", we had one called Hering-hasti and it was really nice, it had motors, a two speed gear box, battery holders, tiny light bulbs etc, but I also use to put 1/8" screws to keep it from falling apart, I also use springs from retractile pens for suspension and use to twist some of my father's paper clips to make control arms.... good times! ps: watching this video looks like you still can't "LE-it-GO" 😂
😆.. yeah it's a toy that got my engineering brain going and still entertains me today 👍
This is awesome. Now I want to build a truck and a camper like this. I've been saying for years that recycling plastic into giant Legos would make a sweet house...
Thanks 👍
MATT you must be the first human on the planet that created a LEGO steady rest for a lathe.
I'm a huge fan of LEGO and found your channel via the Giant LEGO series. This project is just a new level of awesome and crazy.
Stunning work keep it up.
PS Would love to see a stud less build with some of the modern Double Bevel gears or even a mixed build of Technic bricks and stud less
Thank you. Appreciate the feedback 👍😊😊😊
Hello Matt, it's such an amazing build, I think this project brought many new subscribers, didn't it? 😂
yes it did.. I hope it continues this way :D
It certainly brought me in
Every kid needs a Doc, Rick or Matt in their family
Haha! I take that as a huge compliment! Live Rick and Doc 😁
Just when I think my mind can't be blown anymore from TH-cam... This guy turns up! I can do bits myself BUT this stuff is on another planet! Love the creativity and application 👌👌, Phenomenal keep it up, currently working my way through your other content, and subscribed 👍🏻
Oh thank you! I appreciate the feedback. pls share :D
Hi, Matt,
What a great project. I look forward to part 3.
Surely you know it, but maybe some viewers do not.
The screws have to look beyond the stop nuts to prevent them from coming loose. At 6:30
Yes this is true... it was a temporary test 👍
Thanks for always explaining everything
You're welcome
Wow! What a project!
Thanks 🙏
It's the Internet daddy with the new lego video! :3
cant wait for part 3 :)
Thanks
Genuinely surprised we don't see stuff like this at legoland.
I know it's way too late, but when I saw the single axle on the back end, I was thinking it is actually IMPOSSIBLE for any car(t) to turn a corner. Then I saw you wanted more power. My idea would be to cut the axle in half and giving each side a motor. That way the wheels can turn independently from each other, you have twice the power AND you only have to copy (and mirror) the existing pieces you already have made! Win win!
Already done it 👍👍👍
That's so beautiful!
Thanks
After reading several comments about a split axle and separate motors, try this: Dis-connect the drive from the wheel on the opposite side of the motor. (let it spin freely)This will give you one-wheel drive, But will drastically improve your steering capability. This is how old-school go-carts work in the US.
Yeah I can give that a go... One wheel braking too 😆
@@MattDenton Yep, 1 wheel braking too. my first go-cart didn't even have brakes. I braked Flintstone style. I went thru a lot of shoes. When I eventually found a brake drum for my go-cart, I didn't have a brake rod (we didn't use cables) I actually used an extension cord tied around my foot and then attached to the brake drum. It worked for about 4-5 stops, then the wire broke. My return spring on my throttle was a fat rubber-band connected to one of the engine bolts. It worked for about 2 hours before it melted. hey, I was very young and didn't have much money. I used what I had available and it worked.. For the most part.
When I finally got all the correct parts for the go-cart, I took it for one last ride before I sold it at the Flea-market for $100. I never had another go-cart.. So SAD!!
😁... I'll buy lots of shoes 😂
It would be super awesome to see you and ivan work on something crazy and massive together.
Yes it would 🤔
wow, i can wait to see it go
You're my actual hero
Why thank you 👍
Honestly, seeing the Technic pieces hold up that well makes me want to save up hundreds to 3D print the parts needed to build one of BIONICLE's 2009 vehicle sets.
Do it 👍
@@MattDenton I don't know if I'll be lucky to get close to the amount needed to do at least over 100 or so parts and acquire the resources to print parts of that scale (and mostly in multiples), but I'll certainly try, even if it takes years to do so.
Oh man, I can't wait to see the final product!
Thanks 🙏
Limit the speed? You ride a giant mechanical spider!! Full throttlee!! ;)
True 😆
Who needs a Lamborghini? That's my dream car right there
👍👍
Beyond the delightful build updates, I must say I really appreciate the effort you're putting into to masking or integrating any parts that are non Lego. It really shows a great devotion to the heart of the project. Looking forward to the next one!
Yeah that's been tricky.. but I have just machined a new motor mount plate which is going ot be hard to disguise... But may give a better idea of required power. Then I can rethink design
Been looking forward to this!
Good! I've nearly done part 4.. but I think part 5 will be the fun one ...
Matt you're nuts in the best way! Cheers.
Thanks 🤪
This is so cool. I want to see more complex giant LEGO creations. Like technic cars. This is awesome and I’m jealous.
Check out my giant Lego bulldozer!!
A collab with Ivan? Can't wait
Well he's helping me out more than a collab... But that would be fun 😁
@@MattDenton I will be shocked if the parts he'll print aren't RED.
Just great!!!! I love it!!!!
Thanks 🙏
You are a hero this is so cool
Insanely awesome.... !!! WOW.
Thank you .. pls share 👍
Ivan to the rescue !! Love this guy !
Watched this twise. with a huge grin my face.
Great 👍😆
Fabulous project Matt. The way Karts handle the lack of a diff is by setting up the steering geometry so when steering, one of the rear wheels is jacked off the ground (or at least, unloaded)
Yes I read this "jacking" I don't think I'll have any of that :D
I experienced this phenomenon personally when I was driving my sister's kart home one evening and the back wheel fell off. It was too dark to find it in the woods so I had to go the rest of the way on three wheels. It worked perfectly so long as I leaned forward and only turned left, but if I had to turn right the hub dropped and started dragging. Good times, that one was way too small for me too, and I clocked it at 55mph once. I miss that thing...
😆 who needs 4 wheels
What a fabulous project, what fun. You are an inspiration. Eagerly looking forward to the next video.
Thanks
This is going to be AWESOME! Can't wait for Part 3!
Thanks 🙏
The low torque on start up reminds me of the stall conditions mentioned in Technology Connections’ video about why fans startup at higher speed settings.
I love everything about this
This is soooo coooooL!!!!
Maybe also 3D print a tpu helmet lol wow great work.
Will do :D
Fantastic, Matt!
Thanks
I love this project !! Can't wait to see the next update
Thanks 🙏
This is just a really cool project! Can't wait to see how it turns out!
Thanks!
variomatic belt drive will give you plenty of pull away toque, but hard to limit top speed or controll power pick-up with it since electric engines have no idle speed... personally im not a fan of variomatics, but they do work a charm.
Loving this project, I would cut the KV on the motor to at least a 3rd of what it is now, try for a wider bell, shorter bell, more bottom end motor control and use a slightly larger drive gear. The torque difference would be huge and would cut the speed down nicely so that you can reintroduce it back in with more cells on the lipos in series.
Well it's a 149kv motor, there is only a 130 below this unless I go to a different design.
@@MattDenton I didn't consider it was already so low kv.
Very elehant solutions, love the tensioner supported by the rotating shaft.
The steering seems very sensitive!
Thanks .. yeah it's going to be hell to drive 😬
awesome 👍
The motor battery and Vesc combination is usually used for electric skateboards... the skateboards are a lot lighter than your go kart and the parts for these skateboards are meant to be as small as possible. That means you should probably look out for other motors that are bigger. Just search for 1500w Motor on AliExpress or eBay. You will have a lot more torque with these kind of motors even though the wattage is lower. You can also look into converting a car alternator into a motor. Austiwawa made a video about that explaining how to do that.
I hope I was helpful and good luck building your LEGO go kart
Thanks. Yeah I've seen those kart motors about 750 to 1500w bit they are quite large. James offered me one of these so I thought I'd give it a go as it would be easier to conceal. I'll try two and if it's still not enough I'll switch to a larger motor 👍
This is an epic project, moving right along. Looking forward to the next episode. Thanks for sharing
👍👍👍😎😎😎 Cary
Thank you!
in lieu of a differential, maybe split the axle and run each wheel on it's own motor. Then you could use the arduino to program each motor to run at a different speed depending on your steering angle. Or at least only engage just one motor on the outer arc.
Yeah it's the plan I have and have if all else fails.. electronic diff!
Can't wait to see it finished. I bet it will be better than you expected it to be. amazing job👍
I'd think to use a twin motor setup with a split axle. Maybe write some controller logic to put more power to the wheel with more grip (resistance) to avoid getting as stuck depending on terrain. the front wheels can do to use much softer tires, since they barely have any weight on them.
Yeah that is where the design is heading. Twin motor split axle 👍
I love this.
Thanks 🙏
I love the idea and it is class
i was waiting for this video
Add a planetary gear set between the motor and the gear drive. Increase torque and reduce speed simultaneously
Twin motors also solves the differential issue btw
Nice progress btw!
Finally! I love Lego, I love go karts. This is perfect!
Thanks you! :D
im using this as inspiration for my lego motorised buggy :)
This is horrific and amazing all at the same time
oh god, need to make a 2-4x scale lego 12v train!
I love it!
Thanks
I race go karts and this was actually something I was going to do when I had the right tools
Do it anyway 👍👍
So many super clever solutions!!!!!! Great work my friend!
Thank you 👍
It’s so coool!!
Thanks 🙏
You mad man, you're using the R/H stick as the throttle! lol
Yeah 😆.. this comes from driving droids on one stick.
Came here to suggest using the second motor idea as a faux differential to help steering. Good to see we all had similar ideas.
Y’ know he’s a worthy person to subscribe when he makes things I can’t even dream of and even a month afterwards he’s still replying
Oh thank you! Appreciated 👍
You can make one of the rear wheels free spinning with a bearing. Alot of cheap small carts use that as a way to mitigate the differential issues. The only major downside is one wheel drive.
And one wheel braking 😬
@@MattDenton Hah. yeah those cheap carts use pads on the tires as brakes on both sides for that reason!
Awesome!
Not sure if already mentioned but the belt tensioner "should" be made with the look of Lego and in grey. 😀😀
Absolutely love this!!! 😍😍
Thanks. You mean the out belt spacer! The grey bit? I could make a better version that covers the belt and looks like Lego 👍
@@MattDenton Not sure what to call it but you show it at 6:47. 🙂 It's just a small detail on an awesome build but still. 😀
if I was younger I would've loved to have something like this, really cool build!
Thanks 🙏
If you add a 2nd motor and make each wheel spin independently your could program the Arduino to drive both wheels at a different speed while steering which should increase handling a ton
That's the ultimate plan . Electronic diff..
@@MattDenton you could use the dif of a smart like car winout the inner gears in the middle to reinforce the axle so it doesn bend inwards.
Also thought about using the needle bearing washers on the inside?
I know it creates less stress on that side wile taking a turn, but still it pulls on the axle and could make it run smoother.
Yes I do have a second set in case this is needed 👍
@@MattDenton
By the way, love your projects....
Finally someone with an alternative state of mind... 👍👍
By the way, the steering problem can be easily solved...
Print the rear tyres from a material with less grip then the front ones, it will slip at the rear if you start steering.
Of course this all depends on your weight distribution, for you to ride on it and be able to steer, you need to create length so you sit more in the middle.
Amazing! Had me smiling most of the vid :)
God. appreciate the feedback.
The no steering could be because your weight was behind the rear axle. Which means not enough weight is on the front wheels so they dont have enough grip to steer. This may be fixed when you change the seating position.
Love the project 🙏
I also noticed. he should test it on its own, 2nd motor in and he still disnt try to just let it drive half a meter on its own weight
Yeah I'm trying to get weight forward... No differential either... 🤞
Amazing
Thanks 🙏
Excellent.
Thanks
I can just imagine getting this as a kid
Amazing 👌
You're insane!
Hello from Germany.😁
Thanks you! Hello back :D
Thanks for all you do. Entertained and subscribed (and clicking thumbs up on every video !)
Ha! Thank you! pls share :D
Awesome
Thanks
That’s such a cool project! Nice Job!
Thank you 👍
Great video, nice coverage and editing. Novel engineering solutions...that collet was a good idea. : ) Mahalo for sharing! : )
Thanks you. Appreciate the feedback 👍
i love your excitement when you get to a point in the project when you can start testing.. looking forward to the next video dude!
Thanks. Appreciate the feedback 👍
Great stuff Matt. Thoroughly enjoying this one.
Oh and to improve steering perhaps try and chuck some weight over the front axle?
Yeah batteries are going up front.. and I'm shifting my weight forwards a bit.
i love it
I would do two motors and split the axle. That way to get better torque and fixes the lack of differential making steering much better.
Yep that's on my mind to do next 😁
Wow! Just blooming Wow!! Such an awesome project. I’m so tempted being a Lego and 3D printing nerd. Nice one and thank you 🙏
Thank you 👍
i suggest twin motor. when steering with a pair of sensors you might be able to pull off a bit of a tank steering at the back thus faking a differential.
Same idea... a virtual diferential
Yeah I'm heading down the electronic differential path.. motor the steering wheel and apply appropriate speed to appropriate wheel