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 RUclips brings the world together.
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.
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.
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.
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.
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!
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!!!
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!
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.
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
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!
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.
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?
@@Skyentific Yes! I'd love to see more introductory stuff from you, or at least a more in depth explanation for your projects. I love your work and would love to understand more of it!
@@eglintonflats That's one of the issues, there are so many books on the subject, where does one start and how do they progress and in which direction?
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.
I want to make a correction here " high voltage doesn't mean low current". In Robotics torque is more of an important factor than RPM. So 48V means it's designed to carry more current. I am expecting that 48V & 24A can generate around 24Nm effectively by using a 6:1 Gear ratio for your first motor.
Great content, I find your videos very informative, however could you look at the feasibility of using clearpath servo motors for robotic arm projects?
500 dollars for every actuator!!!??? Very expensive, also torgue without speed is not an indication, you can have big gears with small motor and create huge torgue but small speed ... speed should be mentioned in the testings
One of the links above has a tab for specs, and it says 250 rpm. The other (the PRO version) doesn't have a speed. I agree, I'd really want to know both speed & torque before spending this much. Having said that, 20-40 Nm is _a lot_ of torque for something so small.
"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?"
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 🔥
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.
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
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!
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.
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?
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.
@@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
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
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
Здравствуйте. Подскажите пожалуйста сопротивление у обмоток этих моторов. Нужно попробовать их использовать с другими CAN контроллерами. Спасибо. Надеюсь найдете время померить. Хорошего дня!
Вы используете алюминиевые профили которые сильно гнутся - это тоже снижает усилие- torque Я предсказывал что Вы перейдёте на покупные актуаторы ещё пол года назад)
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!
Best way to support my channel is to like, to comment, to share the video and to subscribe.
the Best way to support your channel is to make companies with you !!!
@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.
Здравствуйте! У меня почему то на прямую через их драйвер не конектется, пишет
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 RUclips brings the world together.
It has been super strange to see something I designed copied by so many Chinese vendors, and then reviewed by people on the internet.
You might as well release the CAD now so at least the clones are of better quality ; )
Miss your periodic videos. Hope Life is good at Boston D.
Could you give me a link so i can buy from you?
Nice work tends to end up in some fun places.
Ben Katz if this is a great product, why not? :)
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.
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.
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.
"It's almost like on those fancy RUclips channels", heheh this is a fancy RUclips channel! working on frickin' robot arms
Thanks!
at those prices for each of those it better be.
This channel is heaven! thank you so much for your testing. THIS IS GREAT!
I am amazed! I though something like this would be far more difficult. Thank you for opening my eyes to new possibilities.
your video is really helpful for me (i'm a programmer in s.korea). thank you so much.
Professional content and very clear and light way to explain
Thank you for making these videos.
You're a cool dude, genuinely. I dig it. Definite like and subscribe. Keep going.
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.
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.
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!
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!!!
Good to find someone who knows so much. Liked and subscribed.
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!
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.
thank you for such video
Очень познавательное видео, большое спасибо)
Большое спасибо за добрый комментарий!
As usual, awesome content! Thank you for sharing.
I really appreciate these videos, I wish you great success.
Thank`s you to share your work with the best attitude!!!
Пора открывать производство таких приводов! В будущем робот без таких будет считаться стим панком! Танец в конце- топ!
Спасибо. Я думаю что скоро такие актуаторы начнут дешеветь.
@@Skyentific по ходу сам начну делать
@@Skyentific если покажешь нутрянку
Thank you for sharing! Very good info.
Thank you for your comment!
Just subscribed. Thanks for the great information and resources!
Great videos thank you so much, this helped me so much.
Thanks for the nice video and consistent test method.
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
Thx for your videos!
These are awesome! Great video
Thanks for the good review , very useful
Hi! Where can I find the motor control protocol documentation that is used in this video?
Hey, great review! Do you still have the documentation of this motor by any chance? It would be really useful. Thanks
Hi, it's a really nice actuator, thank's for share :D
Good video and explanation, you rock's, thx!
Thank you a lot!
@@Skyentific Than's for share your work with the best attitude!!!
Thanks!
Very interesting and useful.
very good lesson. It is easy to undestand. Thank you
This is so helpful for my 6 axis 3d printer
Thank you for sharing!Very useful
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!
The links are down, just wanted you to notify :)
Excellent video
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?
Nice video and actuator. Is it possible to review some cobot (collaborative robot) joint actuators like Universal Robots, Han's robotics?
Nice video !
Thank you!
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.
great video!!!!... can you please explain a little bit about what is torque control mode and how you used it in this actuator.
So if you can control the speed of the actuator you could probably slow it down before it stopped to reduce backlash.
Thanks a lot, very interesting!
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?
Can u please do a video on robot kinematics
I should! Many people asked me about this. I will look into it.
@@Skyentific Yes! I'd love to see more introductory stuff from you, or at least a more in depth explanation for your projects. I love your work and would love to understand more of it!
If you can read, then there are numerous books on the subject of robotics kinematics but it requires an effort
@@eglintonflats They don't have a sexy accent though.
@@eglintonflats That's one of the issues, there are so many books on the subject, where does one start and how do they progress and in which direction?
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.
good information, thank you
I want to make a correction here " high voltage doesn't mean low current". In Robotics torque is more of an important factor than RPM. So 48V means it's designed to carry more current. I am expecting that 48V & 24A can generate around 24Nm effectively by using a 6:1 Gear ratio for your first motor.
The size of the motor limits the maximum power
If you pay over $500 for an actuator, you should also look at the Robotis Dynamixel XM and Pro series.
@14:44, let’s increase the torque with the pressure of My Magic hand.
Great content, I find your videos very informative, however could you look at the feasibility of using clearpath servo motors for robotic arm projects?
500 dollars for every actuator!!!???
Very expensive, also torgue without speed is not an indication, you can have big gears with small motor and create huge torgue but small speed ... speed should be mentioned in the testings
total sold 0 items, product reviews 0
@@kokotmkokot4926 well this video was a review ;)
One of the links above has a tab for specs, and it says 250 rpm. The other (the PRO version) doesn't have a speed. I agree, I'd really want to know both speed & torque before spending this much. Having said that, 20-40 Nm is _a lot_ of torque for something so small.
@@AlecMuller he linked a website in the video description. It has a table of specs if you scroll about halfway down.
great job!!! thanks!!!!
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!
Ваш английский становится лучше радует, спасибо за видео)))
Спасибо! Приятно слышать, а то все только и критикуют мой английский! :)
Excellent video and really both products are just beautifull !! Unfortunately a little expensive for me as a hobbyist...
"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?"
Well done.
So beautiful motors 😍
nice video really like it,,, is it necessarily to use termination resistor ??!! and why??
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 🔥
Very interesting! they are not the cheapest thing on this earth but they seems good, maybe for the 7Axis new robot
!
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.
66.7% Positive feedback
for an aliexpress store only open since Oct 2019 seems kinda poor?
Good luck getting a shipment with the coronavirus shutdown going on!
I just received yesterday another parcel from china. No problem.
The virus not survive the travel :-)
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?
I dont know if you have it or not, but you should make a page with projects etc...and a Discord channel.
Good luck!
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
Do you wish that these motors had a higher gear reduction? 1000 RPM seems high for a robot arm application
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!
Thanks for sharing. Is it typical to include another gear with these actuators? Any harm in doing so?
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.
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?
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.
@@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
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
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
Great...
I have no need for one of these but I really want one now lol
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
Hi, @Skyentific you recommend other actuator motor, this is out !
Very cool! are there numbers available for inertia and friction? also I wonder how higher rpm operation is
Very good find, will you use this actuator for your humanoid robotic arm?
I will use it for my second humanoid robot arm. But the first one will use ODrivers and Multistar motors.
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
Ай кам хиар ту си вэри интэрэстинг актуэйторз!
Акцент - это фишка. Пипл хавает.
Здравствуйте. Подскажите пожалуйста сопротивление у обмоток этих моторов. Нужно попробовать их использовать с другими CAN контроллерами. Спасибо. Надеюсь найдете время померить. Хорошего дня!
Hi, thank you for sharing this video. I just bought one. Could you also share your Ardunio code you used for your demo? Thanks
good luck in estimating the backlash via a ruler.
If you cannot estimate it with ruler, it means the backlash is small :)))
@@Skyentific define small :)
What would have been nice to know is; does the feedback (encoder) read the backlash? I have always utilised 2 feedback devices per axis.
Вы используете алюминиевые профили которые сильно гнутся - это тоже снижает усилие- torque
Я предсказывал что Вы перейдёте на покупные актуаторы ещё пол года назад)
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!
Awesome
they look like great actuators. it would be great if there were cheaper alternatives
Good video! Thank you :) What is the nominal speed of the motors?
I am wondering how shock resistant the gear train is. For legged applications, you might overload the gears momentarily.
wow, unboxing...