The Ultimate Guide To Omniwheels (Holonomic, Mecanum, Tank Drive)
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- čas přidán 2. 09. 2018
- A short video detailing the many different ways of setting up omniwheels, as they are cool, but can be confusing.
Riobotz Combat Robot Tutorial Physical Copy:
www.amazon.com/RioBotz-Combat...
Riobotz Combat Robot Tutorial PDF:
www.riobotz.com/riobotz-combo...
Future Reference:
• 8 Motor 1:3 VEX Holono...
Sources:
www.simbotics.org/resources/mo...
robotics.stackexchange.com/qu...
Music: Teknoaxe - Edge Of Tomorrow
• Edge of Tomorrow - Syn... - Věda a technologie
In case you are interested in learning more about these strange drive setups, I made a new video pretty recently that covers the Swerve Drive, which can pick any angle and move straight along it.
Link is right below.
czcams.com/video/vS7AwmvIekA/video.html&ab_channel=KeplerElectronics
Hi
At my school I came up in the middle 5th wheel and it worked but the only bad part is that the middle wheel is really slow but other than that it does not really disrupt anything else around it
I literally have no idea why this was in my recommendeds, but now I need to watch battlebots
Same bro, nothing is better than stumbling onto a community you had no idea existed
If you watch the latest 2 seasons, you will be able to watch these wheels in action on Shatter!, Wich is a fantastic bot
@@Space_Reptile it’s not that good, but the tech is top-notch. Vertical spinners are op tho 2 got into the finals for the past, what, 4 years?
@@biaxolotl5171 its a sodding axe bot, of course it will be behind the bleeding edge high energy spinners
But man does it pull its weight and then some, its a fantastic robot in my book
Finally, we can upgrade shopping carts so there isn’t that one horrible wheel that doesn’t turn
*yee*
FACTS BOI
I invented these kinds of wheels when I was in high school, only to be disappointed to learn that they have already been invented.
I remember noticing something funky about the pythagorean theorem in high school so I started writing stuff down and keeping that note well hidden so nobody could steal it and so I could finish it and perhaps publish it. Fast forward a few months and I find the note again and I'm looking at it and i'm like. "..... That's just the pythagorean theorem slightly rearranged"
@@09jjohns I had a same experience, I didn't study on a geometry test in primary school once, then I thought I made my own formula of the triangle by using formula of the square and divide it by 2
@@09jjohns I once used the pythagorean theorem to estimate pi when I was taking algebra when I was in high school.
I wanted to get the area of a circle with radius 1 and used rectangles whose height was determined by the pythagorean theorem. Turns out the limit of infinite rectangles is just the integral of the graph.
Same I have a old sketch on my note book that is a space rover with these type of wheels I called it wheels with in wheels
I drew a picture on a car in college then Porsche brought out the Carrera GT and it looked almost exactly the same. I was so mad.. but I love the look of the car even though it killed Paul Walker.
The obvious way to make sure that centre wheel is always in contact with the ground is to put it on a swing arm and suspension rig.
Thanks Ruth Moreton
But would it be strong enough to move the vehichle?
Good video, but remember that both mechanum and x-drives lose pushing power and speed: the angled rollers on mecanums waste energy in the same way holonomic drive does
You're likely correct about the pushing power but you're wrong about speed. X-drives are actually faster than standard wheels.
Onmi wheel can act a geared up wheel. If you could maintain traction, you could go really fast by angling the omni wheels away from the direction of travel.
I have several Mecanum and onmi wheel videos on my channel. I also have a video where I attempt to explain the math behind omni wheel speed.
How to deliver tofu faster:
Step 1: install these wheels
Great video! Clear and easy to understand
My one thing though was that I'm pretty sure that the x-drive's biggest disadvantage, especially in "in the zone" was how you were limiting space within the chassis, which would make a mobile goal lift a bit more work.
None the less, great job!
0:50 mount the axle in a slot, and add a small preload spring, or add structural to the centre, if the middle support bows from the load it might take up the slack
Cars should have this so that people have no excuses for parking inproperly
Props for bringing up Rio-Botz. I miss those guys...
Nicely explained and great represention
Just recently got aware that these exist. Got a RC car (RB1277A) with mecanum wheels and swapped it with a STM micro dev board and hobby esc's and could successfully use a program for control that I used for my janky quadcopters back in the days with less than 5 lines of code changed :D. Using it now for FPV and it literally feels like playing a game with a gamecontroller movement wise. Great channel btw!
This makes me appreciate my differential swerve. The only disadvantage to it is that it requires some differential calculus in the programming as well as it being more costly.
It’s really difficult on the programmers and tedious for the builders but holy crap, it dominates in-game
Was dat
@@biaxolotl5171 it’s when you have 2 motors per wheel and 4 wheels on each corner of the robot. Although the same concept works perfectly fine with more wheels.
One motor is for linear movement and the other is for rotational. You can move in the same direction while spinning & be more stable than any other drivetrain.
@@bradyschindler4199 How do you circumvent motor limits? Vex EDR only allows you to use 8 motors, so you wouldn't have any for components.
@@advaithnidumukkala6140 sorry, FRC not FTC
This looks and sounds like science fiction. I LOVE IT!
Looks like wheels to me.
Thanks, I might use this information for my electric longboard build 🤔😊
Thank you for this video 👍🏻 I think it may have solved one of the variables for something I’m building. It’s my first robot and I have a lot to learn fast 😅
It was cool seeing riobots combat robot tutorial in this video, especially since combat robotics is my hobby.
Riobotz book is great! It’s been a great resource as I’ve branched out from vex to combat robotics.
Kepler Electronics very cool! Where do you compete/ where do you plan on competing?
I took my two bots to Kilobots Canadian Nationals in August. The first part of that is up now at
czcams.com/video/gAbGKeRF2To/video.html
Great summary! My application is to accurately retrace a path. Maybe rubber rollers are better than Nylon for this? There is no large slope, and pushing other objects is not a requirement. The design max gross weight is 75 lb.
damn they be tracking our education now I dont even watch robotics videos but I am in a robotics class oml
How can you be in robotics class and not see robotics videos? Don't you like your classes?
Another disadvantage to note for mecanum wheels is that the net force when moving straight forward/back or left/right is weaker than standard wheel options since the forces are directed at 45 degree angles. This means that the total power in mecanum movement is sqrt(2) / 2 times that of traditional wheel options
What were those bars that you were using to build the bodies?
I want to get into combat robotics and most of my "studying" consists of watching pretty much any robot fighting show i can find. I saw an episode from the original CC battlebots with a bot with omni directional wheels. I was impressed by the mobility it was capable of.
Dude watching battlebots is going to help you be an engineer as much as watching the price is right will help you be an economist
@@BlastinRope I'm in my 3rd year studying mechanical engineering. I just don't have the money to get into combat robotics. Because I have to pay for school.
Have you seen Chinkilla?
You just deserve me hitting that subscribe button
To make a 3 wheel x-drive, vex sells 60 degree angles so you could connect 2 60* angles per side.
Mecanums can move in any angle as well, you just need to do math in a controller to vary the throttle given to each wheel depending on the direction you want to go >.>
Hi Kepler,
Thank you for sharing your knowledge on omni directional technologies!
Could you maybe explain how the omni conveyor belts work? I'm trying to create an omni directional surface, but I'm having a hard time finding information on the topic.
I'm no expert on these, but assuming that we are talking about the same design, I believe that the basic gist of how they work is that there are three omni-wheels in a triangle, and the system is programmed to move those wheels in such a way that a large package will move in the desired direction. The rollers help reduce friction so the package can slide across wheels that are perpendicular to the path of the package.
I found this video, and it helped me understand it a bit more.
czcams.com/video/XAokGOEjAFs/video.html
For the problem regarding unintended movement when strafing, perhaps a static response mechanism for the side rollers can be implemented. In a manner of which act like brakes for the rollers, and while the rollers can act as temporary treads over slippery terrain, with all the grooves they have in between the rim and rollers. You know.
If you can make the hubs waterproof if that's your driving conditions; driving over puddles, climbing inclines, mud, etc. You should be golden.
It's ideal to have wheels A and B be the only groups of moving parts from the rollers, instead of additional C and D; it makes things simpler unless you're willing to elaborate and experiment with this project.
I can imagine the 5 wheeled prototype be used for mobile turret fire like hobby grade toys, for RC LARP. Making a Halo Ghost/Wraith should be easy and fun to use.
I was in frc in highschool and wanted to get into vexU now that I’m in college and I’m glad we still got some of the same stuff going on 😂.
tengo una pregunta, ¿ seria viable el primer concepto de ruedas para hacer una silla de ruedas?
Mecanum can move diagonally you need to activate to motors
To times!
That's so good...when ur cabinetbed.......like it makes so easy...or a computer desk
Does anyone know the best wheel/configuration to deal with slight inclines or uneven terrain? ie, so your platform doesn't slide uncontrollably in the slope direction.
If you aren’t bent on using omnis, I’d go for standard traction wheels.
What’s the best wheel for a dragster that doesn’t need to turn?
I have no idea how this got in my feed or what’s he actually saying but these wheels do look pretty cool
i think a flaw these have is the increased stress on the wheels and the smaller wheels could get gunk in there like small rocks and cloth that could get them jammed or decrease the effectiveness greatly.
Some of these configurations must lead to huge wear and tear on the wheel surfaces and therefore a comparison of efficiency would be useful
It is worth mentioning one of the main downsides to the x drive is that it requires a more complicated mechanical design of the robot, H-bases and U-Bases are simple and allow for a lot of room to build game mechanisms within the space, x drives however take up more space, and introduce difficult problems in terms of spacing and stability of the wheels axles, not every design will work with an x drive. And H-drive with the omniwheel in the middle is one of the best designs I've ever worked with, you are able to move diagonally in that base aswell if you drive forward and strafe at the same time. It tends to be less stable but that can be worked out. The wheel not touching the ground can be solved by offsetting the center beam down by 3-4 washer, this causes the center wheel to bite into the ground a little, creating a lot of rigidity and boost crontol a whole lot, and that's something an x drive cannot to at all. I also suggest using two motors for the center wheel as it has to do a lot of heavy lifting
Why does every CZcams video on mecanum wheels have at least two wheels in the wrong location. Here, you have all 4 transposed, which is less obvious/embarrassing than the Sparkfun video, but nevertheless you won't be able to steer unless you flip the chassis upside down.
aww, you made me miss battlebots :(.
Couldn't the fifth wheel in the middle be solved with some sort of spring hydraulics? Cars have those too, you can lower or rise the car with a press of a button. Sure it's just not that simple, but there sure can be a similiar solution if it just can be fitted
Anybody know how much weight the omniwheels can handle?
MASHAALLAH khub valo video....
What is the kit that you used to make the frame and where can i buy it online? thanks.
This type of frame is part of the Vex EDR system of components.
www.vexrobotics.com/vexedr/products/view-all
It seems to me that the x drive is the same as the mecanum drive. It's basically putting the rollers of the omniwheel in the same orientation as the rollers on a typical mecanum setup to achieve a similar effect.
where can i buy those iron rigs?
Maybe you could have the wheels be spheres that the vehicle hovers above using magnets? Like almost touching the spheres but not quite. Seems unreasonably expensive.
You have your Mecanum wheels set in the less desirable (for most applications) of the 2 possible configs. You have it set to the O config (bearings on wheels form a ring shape) instead of the X config (bearings pointing at opposite corners). X is considered superior since directional movement is more stable and is less prone to being knocked off direction.
Not really in the scope of this video so it's not a criticism, I just thought I'd warn anyone who may look at this and assume the O config is the only way.
hey hopefully you'll reply, I'm curious what those frames with screwholes all over are called
It’s the VEX EDR system. It’s a bit pricey, but pretty good for what it’s worth.
That material! The sort clip together material the chassis is made from. Does anyone know what it's called?
It’s part of the VEX EDR system. It can be a bit expensive, but it’s widely used in high school robotics competitions. There are a few other options (Tetrix, Servocity’s line, etc.) but I haven’t played with them personally.
When I saw the thumbnail and the name of the video, I thought it's going to be a bad Warhammer 40k tech video, not something that exists IRL..
And to think that supermarket carts are rebellious and do not allow themselves to be driven properly because of the "swivel casters"! Those are the type of wheels (omniwheels) that are needed.
What's the name of those frames? Look good for prototyping
I’m using the Vex EDR frames. They are pretty great, although a bit on the expensive side.
А как ты решил проблему с торможением?
I have no idea why I got this recommended. I watched the whole video and at the end of it I found out that robot competition is a thing.
Mechanum wheels tend to have higher friction overall because of the slant angle they are trying to drive on, main reason pepe dont use them much in vex is because the size of them isn't worth it in most designs that use all of the allowed space, as an X drive provides more manuverability and can be configured in less space. If they mechanum wheels were built with high quality, they might be worth it, but they are already very expensive so making them even more expensive is another turn off for most people.
So why is it that some say Mecanum is not Omni yet some say it is?? What’s the true difference??
So that's what Sentry Bots in Fallout had on there treads!
With mecanum wheels you can move in every angel
Do you have the .stl file for the mecanum wheel?
All of Vex’s parts can be found on their website, which is always pretty fun.
www.vexrobotics.com/wheels.html
with the omniwheels cyou can turn in to 10 diferret alien wheels
I hope some battle-bots builders are watching this (the sport not the military application)
3:47 Nice voice crack
I am doing a school project and I have to make a robot that can move and pop a ballon using a remote , would these be good wheels ?
It really depends. If the entire goal of the project is to turn and pop a balloon. Then you would probably be fine using normal traction wheels. Most of the time, these wheels are used to gain a competitive advantage in programs like VEX or FIRST.
If you do not already have them, then you would probably be better off looking at either foam wheels or rollerblade wheels. If you do have them, then omniwheels would probably be your best bet.
Kepler Electronics thank you this will help me and my team a lot I’ll let you know how the competition goes
How did that project go?
@@Aagggyy it got canceled last spring due to COVID 😕
@@kainb61 Dang that sucks.
Ese sistemas estaría bien para los carritos del súper 😯🤔
Ezekiel 1:17
Sidooo Drifttooo!
So when are we gonna advance to hyperwheels?
We need wheels on wheels on wheels here, if we're ever going to advance as a species
What is this bike
There is a bit wrong with your holonomic segment. It’s really common in RoboCup and is not limited to 8 direction, using some trig you can really do any angle you want with enough motor control fidelity, and while you cover the three wheel variant, by modifying the control maths you can really have as many was you want.
Braile skatehousr had a board with these wheels on it
Rocket lab uses mecanum wheels, easily move the rockets on the factory floor
8x8 mechanum drive AFV it'd be pretty nasty
this seemes only for plane ground
was expecting just a general overview of omni wheels for all types of hobby or industrial practice, actually got a way more interesting dive into rc combat omnidirectional drive dynamics
also I'm a bit confused, the mecanum setup would allow 8 directional movement with the same amount of mixing as X-drive, so I don't really see the benefit to the X-drive, apart from being interesting
but really don't know anything about bot building, I've watched battlebots and robot wars, but I wouldn't know how to build something that doesn't have the 4 motors oriented upwards with propellers XD
you forgot about the disadvantage of mecanum wheels: overheating of the motors A LOT
3:42
I know im years late, but you should make roller blades that use these wheels.
Im well aware that you'd probably fall flat or do splits, its funny.
So we can make the Batman tank which can strafe
This could end the drift society
0:13 large flavor
I have been participating in Robocup junior competitions from 2005 to 2013 and as a referee since then and over all these years the 3 wheel 120 degree omni drive has been the undisputed best design, even though I won several competitions with a 2 wheel robot that had way more grip and torque and therefore was faster, but could not move sideways. In lower leagues that was an advantage, but on the German national level in Robosoccer 2vs2 Version A, my team got absolutely obliterated by teams with the 3 wheel 120 degree design.
There have only been a hand full of teams that have ever tried any of the 4 wheel designs, but they are all significantly inferior to the 3 wheel design, because any stable object needs only 3 points of contact. If you have 4 points of contact, you cannot have the same downforce on all wheels, which makes your robot less controllable. Also the added weight and space needed for the 4th wheel is simply not worth the investment.
1:36 ah the borderlands anti grav hover wheels
Why was this recommended to me? I haven't done VEX in years.
Imagine a car made with these wheels
Tokyo drift v2.0
I searched for this after pewdiepies new video
Aren't those from borderlands 3?
Imagine playing with small wheels and mini robots with low traction
-This post was made by FRC swerve drive gang
Max speed: 90
Tonnage:1300
Power: -19%
Durability: 360
Mass: 310
Borderlands 3 has Omniwheels
Thumbnail looks like IRON HULK FINGRES .
Stopping might be a issue.
Just a ball wheel would be better in my opinion.
Tldr: Omniwheels can strafe.
But 25000 bonus points who originally invented the omnidirectional wheel
We’re a few steps closer to ready player 1
Wait wait you can drift with those wheels
I made a triangle robot and it was a Garbage in every aspect possible
Daniken
You know what tank need.
Its leg.