I found Best Robot Actuator (GYEMS: RMD x8)

I found really cool Quasi Direct Drive (QDD) Robotic Actuators. They have a normal position control and also a torque control. Here I tested them and they show the torque more than 30Nm. I was really impressed by the CAN protocol, it is well developed. If you need MIT Mini Cheetah like actuator, I really advise these ones.
Links:
www.aliexpress.com/item/10000...
www.aliexpress.com/item/10000...
Special thanks to my special Patrons: Wesley Corp and RobotDigg Shanghai!
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#Robotics #Robot #Actuator

[@Skyentific]

Best way to support my channel is to like, to comment, to share the video and to subscribe.

[@christophemalvasio5569]

the Best way to support your channel is to make companies with you !!!

[@Texaca]

@Simon Julius ...what does that have to do with this video? it's not relevant to this channel, or the technology being tested in this video.

[@user-sw2ed2xz8i]

Здравствуйте! У меня почему то на прямую через их драйвер не конектется, пишет

[@BenKatz]

It has been super strange to see something I designed copied by so many Chinese vendors, and then reviewed by people on the internet.

[@columbustalley330]

You might as well release the CAD now so at least the clones are of better quality ; )

[@Nill757]

Miss your periodic videos. Hope Life is good at Boston D.

[@montanacaleb]

Could you give me a link so i can buy from you?

[@alexmeakins]

Nice work tends to end up in some fun places.

[@Skyentific]

Ben Katz if this is a great product, why not? :)

[@devers6]

I want to tell you how much I enjoy watching all your videos. I am only casually interested in robotics; I have no real applications that I could use for myself. But I very much like watching your videos because you show the entire process of evaluating motors and mechanisms. I have been a CNC and 3D printing enthusiast for over 25 years now, and robotics may become affordable enough in the future that I might begin to dream up uses that I can’t envision today. But in the meantime I find great joy in watching all of your projects and experiments. You are one of my favorite channels, and I hope you continue with your videos because they are so informative and entertaining. I love how KZbin brings the world together.

[@sanjaybhatikar]

I am amazed! I though something like this would be far more difficult. Thank you for opening my eyes to new possibilities.

[@dieselphiend]

Thank you so much for sharing these! I've been looking for something like this for a very long time for the purpose of building a very advanced camera slider!

[@chemicalcorrosion]

As usual, awesome content! Thank you for sharing.

[@abd-ullahel-sayed4102]

This channel is heaven! thank you so much for your testing. THIS IS GREAT!

[@BebenX]

I really appreciate these videos, I wish you great success.

[@skydivekrazy76]

Thank you for making these videos.

[@hemreozgur]

Thanks for the nice video and consistent test method.

[@viacheslavdobrovolskiy]

Dude, it's so great that world have such a wonderful videomaker. I'm appreciate that your content is full of practical use and a little bit of humor.

[@ScottOlsenctrlbreak]

You're a cool dude, genuinely. I dig it. Definite like and subscribe. Keep going.

[@protesisroboticamexicana5296]

Thank`s you to share your work with the best attitude!!!

[@davidkooi4349]

Just subscribed. Thanks for the great information and resources!

[@gawags4709]

These are awesome! Great video

[@klausnielsen1537]

There is something reassuring about your way of explaining and demonstrating your ideas and progress that I really like. Your could be a good politician.

[@manoharsambandam4402]

Thanks for the good review , very useful

[@fischertechrobots]

Thx for your videos!

[@bernard2735]

Good to find someone who knows so much. Liked and subscribed.

[@EcoGreensFarm]

Thank you for sharing! Very good info.

[@Skyentific]

Thank you for your comment!

[@atefbenhazem9073]

Hi, it's a really nice actuator, thank's for share :D

[@10356665]

Professional content and very clear and light way to explain

[@bhong69]

your video is really helpful for me (i'm a programmer in s.korea). thank you so much.

[@cheneychen1247]

Thank you for sharing！Very useful

[@taivovutt6869]

Thanks! Very interesting and useful.

[@trinityklinkert9021]

Great videos thank you so much, this helped me so much.

[@tonysfun]

Very well done presentation! I came because of James Bruton youtube channel and he loves your channel also! I had to become a subscriber, because of your honesty! Thank you very much!!!

[@allenmaker2718]

Thanks a lot, very interesting!

[@anasghobj8044]

thank you for such video

[@phuoctholy3936]

very good lesson. It is easy to undestand. Thank you

[@protesisroboticamexicana5296]

Good video and explanation, you rock's, thx!

[@Skyentific]

Thank you a lot!

[@protesisroboticamexicana5296]

@@Skyentific Than's for share your work with the best attitude!!!

[@ukyakin]

Очень познавательное видео, большое спасибо)

[@Skyentific]

Большое спасибо за добрый комментарий!

[@ChainsawDNA]

Excellent video

[@miguelangelgamboagamboa8196]

great job!!! thanks!!!!

[@braindeadbzh]

So beautiful motors 😍

[@alsonic19]

good information, thank you

[@Texaca]

10:06 ...nice socks. lol Great job on the video, it is very informative. I always wondered how these devices worked. I have been very interested in this technology, since seeing the HAL (Hybrid Assisted Limbs) exoskeleton in a video, that was developed by Cyberdyne in Japan. Thanks for sharing your knowledge. --- Alfredo @ Tyler, TX, USA

[@anonymous.youtuber]

Nice video !

[@Skyentific]

Thank you!

[@Nill757]

Well done.

[@PhG1961]

Excellent video and really both products are just beautifull !! Unfortunately a little expensive for me as a hobbyist...

[@BunkerSquirrel]

Watching it jump in his hand when he changes direction is both scary and beautiful. Like watching that guy with the bear sanctuary play with his bears.

[@mattanimation]

"It's almost like on those fancy KZbin channels", heheh this is a fancy KZbin channel! working on frickin' robot arms

[@Skyentific]

Thanks!

[@vonries]

at those prices for each of those it better be.

[@charlesohams9518]

Great content, I find your videos very informative, however could you look at the feasibility of using clearpath servo motors for robotic arm projects?

[@NathanBuildsRobots]

Thanks for bringing attention to these actuators. I bought one for a project. Do you have a video that details how to use the CAN bus?

[@zhaoyuangu4621]

Hi, this is a really nice video. Thanks for uploading. I wonder if you have tested the peak current it takes to reach the 31+ Nm? Thanks again!

[@Martin-xb2rz]

This is so helpful for my 6 axis 3d printer

[@stepbystep-robotics6881]

This is the servo that I mentioned to you on your previous video but you haven't replied to my question. Anyway, yeah the good thing is it can read position in multi-turn. But when ever you turn off the power and power again, the servo will lost its absolute position, so you may need to calibrate every time you reboot the servo to get the absolute output shaft position. It's just a small issue, just point out to you :) anyway nice video again!

[@UnidudeNine]

Do you have any idea what library he's using? I can find an "mcp_can" library by searching on github, but none of the ones I found were compatible with his code.

[@XtremaXRK]

great video!!!!... can you please explain a little bit about what is torque control mode and how you used it in this actuator.

[@Gargantuanman91]

Hi first of all very interesting videos keep the great work, secondly which D printer do you use for making your parts? thank you very much

[@derrickbabb1125]

Awesome

[@aravinthkumar7924]

Nice video and actuator. Is it possible to review some cobot (collaborative robot) joint actuators like Universal Robots, Han's robotics?

[@AppleCakes7]

Very cool! are there numbers available for inertia and friction? also I wonder how higher rpm operation is

[@NickTheHunter]

Good video! Thank you :) What is the nominal speed of the motors?

[@macteh7298]

Wow, for a robotic student seeing these actuators is sooo pleasing to the eyes. If possible plz do make a video of some of the options for the feedback systems that we can use in case of using a normal DC motor with gearbox (not a stepper motor) for the actuators. This is my project actually sothat we can use the DC motor of our choice.

[@GrahamCantin]

So basically, making these nice cheap multipole actuators completely worthless by switching back to a design with no holding torque, phase backlash, big EMF capacitors, and terrible positional control.

[@happyhayot]

Hey, great review! Do you still have the documentation of this motor by any chance? It would be really useful. Thanks

[@andreyzolotoev]

Пора открывать производство таких приводов! В будущем робот без таких будет считаться стим панком! Танец в конце- топ!

[@Skyentific]

Спасибо. Я думаю что скоро такие актуаторы начнут дешеветь.

[@andreyzolotoev]

@@Skyentific по ходу сам начну делать

[@andreyzolotoev]

@@Skyentific если покажешь нутрянку

[@christianmackin9465]

Great video! It inspired me to buy the RMD-X8. Would it be possible for you to publish the code you wrote to test the actuator?

[@Tobbera]

Great review! Could I ask you if you have any idea about the backdrive reistance? With this I means what effort (Nm) is needed to manually drive the output shaft when the actuator is turned off. In my project it is very important that the device can be manually overrriden without adding too much resistance. Thank you in advance!

[@qobilruzmatov48]

Nice

[@alfiolocatelli5093]

Very interesting! they are not the cheapest thing on this earth but they seems good, maybe for the 7Axis new robot !

[@johannscharfetter6686]

Thank you for this video. It helps me a lot. Please could you explain how information from the motor can be read on the Mac. Which program is needed for that? It is shown on the video at 7 min 28 sec.

[@derickghoda1947]

Great review. I would like to know if this motor has an internal brake that can prevent it from turning when there is no power to the motor. Just like in an industrial robot where the robot arm segments stay in place when the robot is turned off.

[@umerhuzaifa4927]

Thanks for sharing. Is it typical to include another gear with these actuators? Any harm in doing so?

[@user-re5oj9bp1f]

nice video really like it,,, is it necessarily to use termination resistor ??!! and why??

[@backpropagated]

I have no need for one of these but I really want one now lol

[@772777777777777]

Great channel... Love your explaination and your details... i would lo e to build 7 dof to hold a industral router. Question have you ever looked at clear path servo motors?

[@Skyentific]

Thank you. Theoretically, if you would like to make serial robot, clearpath servos are a little bit heavy for its torque. You would need to use a large reduction gearbox. Personally, I never used these servos.

[@772777777777777]

@@Skyentific i was thinking of using a 5kw atc spindleon the end of the arm.... aprox 20kg....which means redesigning your fram i would..love to 3d print a mold of it..would require redesigned heavy duty supports and thicker bracing support and cast the peices from carbon fiber shell filled mineral cast expoxy....yes...much heavy industrial robotic arm..using clearpath servo and..harmonic gears... Where can find a free 3d cad model of this or simular 7 dom arm

[@catalinaguta4613]

Hi! Where can I find the motor control protocol documentation that is used in this video?

[@Mikle_Fedorov]

A very interesting option is a motor wheel from a gyro scooter. 600rpm and 350W nominal. very large Nm and no backlash. the price for a motor is only $ 30-40. I controlled using a VESC controller. very well you can configure the necessary PID. I will assume that the difference in Nm is ~ 1.5. in favor of gear with play :-( but just by increasing the voltage you can easily raise the current -> Nm. I turned the 36V motor from 60V. without heating I could not give a continuous load. but the most important thing is WITHOUT BACK LASH!

[@maheshpatel2005]

Great...

[@agorbot4523]

I dont know if you have it or not, but you should make a page with projects etc...and a Discord channel. Good luck!

[@swannschilling474]

Very good find, will you use this actuator for your humanoid robotic arm?

[@Skyentific]

I will use it for my second humanoid robot arm. But the first one will use ODrivers and Multistar motors.

[@janoskeresztes8323]

Hi, thank you for sharing this video. I just bought one. Could you also share your Ardunio code you used for your demo? Thanks

[@johannscharfetter6686]

In minute 4:37 you mention that you implemented two termination resistor on the cable that goes from the CanBus shield to the RMD X8 Motor. Please can specify which termination resistors you used and in which sequence?

[@user-po1gg7df2h]

WOW! Can I ask that where can I find this manual?

[@vjszq4]

To build robotic arms, you need lightweight motors with high torque. If you compare continuous torque to motor weight ratio, Dynamixel H54 is the best.

[@jcims]

I would love to make a 2 axis gimbal platform for a telescope/camera out of something like this for tracking terrestrial things like rocket launches and races. Do they provide any kind of measure of mechanical vibration in the drive? What is your subjective experience based on tinkering with them?

[@juanpablocanguro]

Hi! we are experiencing difficulties trying to find a good way to home the actuator, it comes with an absolute encoder, but unfortunately it is not mounted on the output shaft, but on the motor shaft, so we can detect home in the 0-360 range of the motor shaft, however, we dont know on which of the 6 positions of the gearbox output it is on... not without adding an extra encoder, limit or home switch and a routine. Are there any similar motors out there that do have an output shaft encoder, or how do you recommend we go around this? Thanks!

[@prometheususa]

I am wondering how shock resistant the gear train is. For legged applications, you might overload the gears momentarily.

[@antonwinter630]

they look like great actuators. it would be great if there were cheaper alternatives

[@katerinarostova4312]

wow, unboxing...

[@devanshusharma1879]

"Great video! I'm curious about the actuator's flexibility. Can you also adjust the stiffness and drag values on this actuator, similar to what's possible with the Mini Cheetah clone actuator?"

[@uawinwin]

Skyentific what will be if you increase torque it will corrupt actuator? for example if i want use actuator for milling wood plate i should use some reduction gear ?

[@timuvlad6764]

How did you calculate the backlash of the arm? I can't seem to find it online

[@nameaboveallnames1267]

Where can you get drawings for these actuators?

[@user-bp4qz5ps8m]

Welcome. I have a question about the universal robot arm, how is the mechanism of moving the arm by hand and then storing the movement, explain this please

[@Tehknein]

Does the No driver model come with a encoder still? I’d like to use odrive. Wasn’t sure if these have a driver board with a integrated encoder on a outboard shaft or some thing similar

[@johnstifter]

Would a breakthrough in actuators accelerate the widespread use of robots?

[@AndriiShramko]

Здравствуйте. Подскажите пожалуйста сопротивление у обмоток этих моторов. Нужно попробовать их использовать с другими CAN контроллерами. Спасибо. Надеюсь найдете время померить. Хорошего дня!

[@aarondcmedia9585]

66.7% Positive feedback for an aliexpress store only open since Oct 2019 seems kinda poor?

[@gerokatseros]

I m thinking of using those strong and cheap compaired to this , e-skateboards brushless motors along with odrive or FSESC that cost one fourth of this actuator for a robotic arm

[@mediajosh]

Any idea on whether MyActuator is still supporting these motors? They seem to have gone offline and aren't responding to support messages. Using this exact same setup and code, can't get any communication with the motors, even with the debug software.

[@SinanAkkoyun]

The links are down, just wanted you to notify :)

[@JuwhanYoo]

Hi, Could you explain how to adjust PID values with that? For reference, I have a plan to develop SCARA arm (H: 68cm, L1: 30cm, L2:30cm) using use RMD X8 Pro.

[@csi9915]

may I know how to diy the CAN connect cable like you do?

[@Dave-nz5jf]

So if you can control the speed of the actuator you could probably slow it down before it stopped to reduce backlash.

[@jonwatte4293]

If you pay over $500 for an actuator, you should also look at the Robotis Dynamixel XM and Pro series.

[@jdmeesey]

You certainly would look a lot fancier with a couple led diffused light sources. Maybe I don’t know what I’m talking about, but I know your subscriber count will benefit from some better lighting gear 🔥

[@jrohit1110]

Hi! Do we have a variant with 100Nm torque capabilities?

[@piethelderop8085]

I have the steadyWin actuator, i suppose you have to calibrate motor before it will move at all :-). The red light comes up , but no movement

[@lubeckable]

can you recommend any affordable robot actuator?