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 RU-vid brings the world together.
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.
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.
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.
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!!!
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!
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!
@@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.
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.
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.
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 🔥
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
Вы используете алюминиевые профили которые сильно гнутся - это тоже снижает усилие- torque Я предсказывал что Вы перейдёте на покупные актуаторы ещё пол года назад)
Great content, I find your videos very informative, however could you look at the feasibility of using clearpath servo motors for robotic arm projects?
В последние дни тоже начал плотно интересоваться четвероногими...Особенно как увидел видео, ссылку не поставлю-чтобы не реклама :-) - Unitree Robotics. Давно хотел что то подобное собрать. Понятно, что работы там-просто немеряно...Но хочется все равно! Видел люди собирают даже на ардуинах, резво бегающие. А вот насчет больших роботов все было интересно-какие движки они берут...
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?
Можно боковой индикатор использовать типа ИРБ на стойке - тогда не только люфт но и повторяемость проверить хотя наверное она равна люфту. У куки KR agilus повторяемость 3 сотки по заявлениям на всем достижимом диапазоне перемещений, а тут если люфты милиметровые это как бы хуже в тысячу раз. Да и цена на али за 20К уж сильно кусается :).
"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?"
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
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.
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.
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!
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