Best robot design I ever seen so far becauseI think your design is more energy efficient and nice looking. Good job man!

@JaycubL

9 жыл бұрын

Getaneh T Thanks! I think the one I modeled in plastic would be a good rear leg for the 4 leg robot but I think the leg I show at the end would be a better front leg because it has better control.

I love algodoo! Thanks for showing!

Great work! Thanks for sharing the information. Just one note @ 5:55 the light-colored link is crossing a joint (over-lapping then under-lapping it)

lovely stuff bro :)

what a cool and ambitious project, best of luck

thanks for the video it gave me brain waves already designing one my self

Hi! Please create part 2 !

Thank you man, this is hot leg

What's the name of the guy who came up with the second leg design?

that was great if you dont mind can i use some of your ideas im trying to build a project of my own and need a little help

nice job i like it so much and i want to make such one , plz if you have a detailed design of the leg with the dimensions could you send it to me and thx a lot i will be so grateful

Excelente trabajo. ¿Podría compartir los archivos stl para impresión 3D? Saludos desde El Salvador.

nicee :D

Hi sir, I just wanted to ask ya about the program u used to design and test the mechanism of the pieces?

@rpyrat

4 жыл бұрын

Algodoo

can u send ur designs???

great

Great work! I am putting this design on my to do list. What type of screws do you use to create the passive joints in the first design? My current method is very crude and not structurally sound.

@JaycubL

8 жыл бұрын

+Alex Martin Those are cut pieces of 1/4" aluminum rod. Thanks for watching!

How did you decide the shape of the curve that your mechanism traces out on Algodoo?

Hi，may I ask what bricks are used in your video?

Can you make it jump or change to climb crawler mode? If you can, its really useful for off road..

Will these robots have mini-crossbows mounted on them?

Part 2 is up! kzread.info/dash/bejne/dJ2ht8OxfNHXYKw.html

@SolovyovSerhiy

9 жыл бұрын

Thank you!

I love this leg design and thanks for posting this. Did you come up with this leg design? I actually made the legs out of cardboard and tried to make a walking cat for my mom as a mothers day gift. I used rubber bands and pulleys and got the legs motion working at a good speed but it just won't walk I think due to the cardboard flexing too much. Holding it off the ground it looks good while working as if it's a real cat walking. I added another pulley to slow it down but still would not walk but no doubt in my mind a 3d printed one will work great using gears. If you want to see the cardboard version I made in action I can send you link to video. Thanks again and I can't wait to see your working model I have complete confidence in it.

@JaycubL

9 жыл бұрын

Nesmaniac Cool, yes I would love to see the video of yours. Yes I came up with this leg design. I based the shape on a mechanical puppet I saw, then designed the mechanism for it to work like this.

+JaycubL can i download the sketchup files somehow? I REALLY NEED THEM!

@JaycubL

7 жыл бұрын

The HDD failed a couple years ago with the files on it but if I recover the files somehow I will put a download link in this video and later videos in this series (series on my channel can be long-running but I do finish them).

how can i download design ?

Forgive me, but I noticed that when you traced the movement of the legs, the desired travel would be a mirror image, upside down. I have been interested in these things for a decade. I dont like the multi bar linkages because of complexity, and load bearing issues. but the strong point is the constant velocity of the feet. My feet would be variable if driven through a constant speed crankshaft. A drawback of Theo Jansens machines is the front feet always hit obstacles, rather than lift over them.

@JaycubL

8 жыл бұрын

+Timothy Dennison Thank you for your comment! The lower leg is designed to be springy / bendable, I don't think a perfectly flat down swing would be the best for running (some tension in the leg is good for speed and uneven ground). But for sure there is lots of detail and improvement to be added to this for a full size model. You could have the upper and lower legs controlled independently instead of together. I thought this was a cool mechanism though. The Biped leg shown at the end I also have plans for. I like it so much because it can be a long leg that is strong and lightweight with all the motors/control done at the hip, up inside the robot while still keeping full control of each joint.

We last leg looked like that of elephant and i dont think u should use it as its front

Can you please send your design . I will be thankful to you

Can you make a Lego technic tutorial for this

I want to buy this type of thing

Hi bro, this is amazing!...I want to ask you where did you buy that lego, I've been finding that kind of lego for years

I did exactly the same in solid works and met with the complexities in finding the material for the same. I was thinking to make it using 3-D printing, but my friend was worried about the price of 3-D printing in here. Expected quick reply back mailing to u is delayed

@JaycubL

7 жыл бұрын

How big are you wanting to make it? It may be possible to build it out of cheap steel or plastic pipe.

@Deepuravi2210

7 жыл бұрын

6 inch long foot

nice

@JaycubL

6 жыл бұрын

Now I'm trying to learn enough on the computer programming side of it. I will probably not complete this small model at this point but just go to a larger one.

+JaycubL Can u tell/show/make a video about what materials u need and how to assemble them for the hind leg? Its only for a little toy I'm making for myself. Its like a miniature my little pony toy, just a fun little project. The back leg in ur design is what i need for the hock of the leg, and for locomotion I am new to robotics, so sorry for the bother.

hey! just wondering, can you make the same design for a 2 legged walking robot or is it just for the 4 legged one? need it for my high school project, plz and thank u :) Great design btw

@JaycubL

8 жыл бұрын

+Jude Manzano You could use a similar design but you probably need a better foot and more individual control of joints. My opinion is that my leg design that is shown starting at 4:54 is better.

thanks for sharing, mostly the algodoo link Ihad months looking for any software for computational design, do you know which software Disney use?

@JaycubL

4 жыл бұрын

I don't know what Disney uses, they probably make their own software and keep it private.

which software you use

Hi!. Which sofware you use to generate de simulation? (at 0.27 time) Thaks.

@JaycubL

9 жыл бұрын

www.algodoo.com/

hey i want the sketch of your model

@JaycubL

7 жыл бұрын

Why do you think that I should give it to you if you ask like that? It is on a hard drive that failed, not sure if I can recover it or if I will even try.

I’m gonna make one that looks like cynder from the legend of spyro dawn of the dragon

What is name that robot simulation?

@JaycubL

9 жыл бұрын

고현우 There is a link to the 2d physics simulator algodoo in the video description.

You need to reverse the movement, so that the starighter arch is active while in contact with the ground, and the larger arch is the one traveling trough the sky, because when you walk your hips staye level, and the your legs arch in space while taking a step, the then end up on the ground again. That is why noone is using this design, not because it is a great original design, but because the most efficient motion is not achieved. When you look at the notes of Theo Janssen he ephasized this a lot, it is all about the leg movement being straight, and in a straight line. The second issue is the time with ground contact doesnt work out on your design. There needs to always be contact between the leg and the ground, since machines dont float. You can manipulate the shape of the circle to speed up and slow down the motion of the leg, which basically means that the leg is in contact with the ground more then half the time, and in the air less then half the time. Then you still need to calculate momentum, since in a design where you have four moving legs, two legs won't be stable enough to hold the object up. Again, use the shape of a circle to manipulate your timing and create a good momentum so that the robot does not tip over.

@JaycubL

8 жыл бұрын

+Hendrik Hans Havermoudt Thank you for your comment! For running you want a lot of pressure on the ground, so the lower leg would be made to be springy (possibly with joints and a cable-tendon with a spring at the end). For the full size model the individual movements can have more separated control to get the exact movement needed for the type of ground and for the speed (walking/running). The wheel-controlled reciprocating motion works well to show the mechanical concept though, and I think it could work well at running speed with a sprung lower leg. I have a lot of respect for Theo Jansen's mechanisms, but they are meant to walk slow on flat ground with many legs. His design is very cool and I have taken inspiration from it.

@JaycubL

8 жыл бұрын

+Hendrik Hans Havermoudt What do you think of the design shown starting at 4:55 ? That is my best design in my opinion, I want to use it for a biped or possibly the front legs of a quadruped.

@hendrikhanshavermoudt7520

8 жыл бұрын

+JaycubL I much prefer the second design that you showed in your video over the first one. With your first design the robot won't stay parallel to the ground. You have both upwards and downwards movement aswell as forward movement. If you wanted to make something jump then that would be a good design, however when we look at the way that four legged creatures in nature run, we see that they stay parallel to the ground. Your first design right now will be more like when a cowboy tries to ride a mad bull, a lot of kicking into the air, which is the upwards movement, and little forward movement. It could work if there was enough weight on the legs so that some of that upward movement would be cancelled out, however it would still make for a very inefficient design. Now if you could reverse that motion somehow, so that the legs would be in contact with the ground without having the up and down movement that you currently have, then your design would be really great, because then it would not want to jump, and instead would want to mover forward. Then to get into your idea with the springs, in theory it could work, however it creates a few extra problems. First of all you again get the upwards movement. So you have jumping instaed of going forward, so you would have to think up some way to redirect the upwards movement forward, which is realy hard. The sort of robot that in my opinion could do such a thing would need a lot more articulation, joints that move separate from each other. You would be looking at something with digital sensors, I think that the easiest would be to type up a program that inputs dat from a gyroscope to compensate the movement so that the body is always horizontal, and calculate the exact movements of the joints to take in consideration things like momentum and grip, and then hook it up to stepper motors in the joints, however that would be a whole other type of project. To kind of explain why legs and speed don't go together, a wheel is nearly always in contact with the ground. Supercars are designed to have lots of downward force to push them down into the ground so that they have more grip, more torque, so more speed. Legs are inefficient because they are not always in contact with the ground, and they need to move away from the ground to move foraward. When a car loses its grip at high speeds, it crashes. The reason that a car would loose grip at high speed will usually be bacause of rain, or bad design. When you have a leg, then you have to loose that grip, because it needs to move up and forward. It is very inefficient, because you are bothe wasting a bunch of energy with moving into the opposite direction as where you need to be going to (a leg goes backward to push itself forward, then lifts up and moves forward, to then go backward again), and you have to loose contact with the ground, so that you have to loose your grip on purpose, therefore loosing a bunch of torque, and limiting your top speed, because as soon as your leg moves down again at a high speed, the leg will act as a break (unless you put in a simple mechanical thingy to allow for releasing pressure but this would be wasting even more energy), causing for the force that cant be transferred from the engine(legs) into the forward movement to look for another way out, resulting in a robot that want to jump like a bull with a cowboy on it's back, or a leg that digs itself into the dirt like a wheel in mud, or a loss of colntroll over the machine similar to when a car starts spinning uncontrollably when you drive to hard in the rain. Speed is not made for wheels. However if it does really interest you to make a fast walker, i would recommend watching slow motion videos of animals running, and try drawing out the way that their joints and bones move in space when they run. Just draw it in straight lines and dots, like a stick figure By drawing it out you will understand the movements of a animal in motion better, and you might find a relationship between certain movements, which could result in the next great walking mechanism, similar to how Theo Janssens design is respected by people now.

@JaycubL

8 жыл бұрын

Hendrik Hans Havermoudt Thank you for taking the time and effort to leave such a long comment! I appreciate it. Based on research from MIT Biomimetics lab I think that for running you do want a lot of pressure on the ground. That would mean a swing path that moves the foot below the ground, with tension building in the leg as the ground resists the downward swing. For slower walking on flat ground, yes a level swing across the ground is what you want for it to work nicely. I think that for ground where the flat of swing path will work, a wheel will also work though. biomimetics.mit.edu/research/biotensegrity One way to imagine a running animal at full sprint is that it is actually flying, and the legs need to slap the ground really hard in a rhythm to provide lift and thrust, and steering force. As far as speed, yes I totally agree that a car is obviously better. The intent of this 4-leg robot project is to get an any terrain ride-able horse-lion type thing, and partly just for fun and videos. If it can reach horse-type speeds that would be an extreme success in my mind, I am not expecting car-type speeds. But you would not ride a car up the side of a cliff or tree either (a cat may be able to do that). A legged machine can possibly go anywhere you could get to on foot or maybe even harder places if the design is extremely good. My opinion is that the feline body is the best form for a land animal.

@hendrikhanshavermoudt7520

8 жыл бұрын

+JaycubL Hey, no problem! A few weeks ago i came across a US millitary document that was going further into all terrain walking vehicles, however i didnt safe it, which i now regret. The MIT document you send id new to me, and i'll look at it once i have some time, so thank you for that. As i said before, in theory sprung legs would work amazingly, however it would require precision, and my worry is that it is not achievable in a design that is based on a two axle movement. I have thought about it today aswell, and I drew up a few designs that i want to test out, so if something comes out of those designs I'll send it your way. I want to try out very precise movements in a similar way that Matthias Wandels pentarouter. I have a theory that this is also the way that the automaton of the writing kid works, however I don't remember the bame of the artist. I'll edit this comment if I have the time so that there are links to what I am referring to.

@jaycubL need some help ! can i have your mail address ?

Sized picture you send mail? osman.iren@outlook.com

Mm hmm.....

hey

@JaycubL

7 жыл бұрын

I'm not sure what you want me to do to help. If you already designed your own in solid works, then you are doing well on your own. I can build one for you if you want to pay for it, but I can't guarantee it would be finished quickly.

@Deepuravi2210

7 жыл бұрын

How much time it would take for you

@JaycubL

7 жыл бұрын

Ravi rithwik Well what would you want it to be made out of? If you want it 3D printed, then I could send you the right and left pair I already have (they are also connected as one unit, with a 3d printed "hip"). Otherwise I don't think I would have time to do it before maybe Jan.-Feb. next year.

@Deepuravi2210

7 жыл бұрын

Oh no that won't be feasible

Can I've your contact number? I need the one exactly same.

@JaycubL

7 жыл бұрын

You mean that you want to buy this? Yu can email me at: jaycubl@hotmail.com and we can work out the price and shipping. I actually have two of these (right and left) with a hip section that connects them.

@Deepuravi2210

7 жыл бұрын

Ok then Tell me the finalized price that you're expecting. So that I'll be mentally prepared

@JaycubL

7 жыл бұрын

Ravi rithwik Well I do not know the shipping price, but I would sell the two legs and hip (both left and right together) for $30 USD plus shipping.

@Deepuravi2210

7 жыл бұрын

Give me both of them ( two hip joints)

@Deepuravi2210

7 жыл бұрын

Can u send your contact (WhatsApp)

Please created file send. onurhanzengi@hotmail.com

Nice job. I designed a similar model using Solidworks. kzread.info/dash/bejne/fYqqq5OKotTKYps.html

What's the name of the guy who came up with the second leg design?

@JaycubL

10 жыл бұрын

Theo Jansen, if you search that lots of things should come up.

@JeanDeBailliencourt

10 жыл бұрын

JaycubL Thanks. :-)