Ideal for the Super Fast Robot (T-motor)
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- เผยแพร่เมื่อ 25 มิ.ย. 2024
- T-motor company was kind enough to send me two robot actuators with MIT mini Cheetah controllers. And It was a pleasure to test them. Thanks to the fast controller you can do the collision detection and bilateral telepresence.
Here the link to this actuator:
Sales Engineer: Yoyo Liu
E-mail: yoyo@tmotor.com
Skype: Yoyo28rctiger
WhatsApp: +86 15797704489
Product Link: store-en.tmotor.com/goods.php...
Special thanks to my special Patrons: Wesley Corp, RobotDigg Shanghai, Pierre Freyssinet, M. Aali and Shounak Bhattacharya!
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#Actuator #Brushless #Robotics - วิทยาศาสตร์และเทคโนโลยี
Друг, i love the way you present. Every time i watch a video of yours i have good laughs guaranteed and perfectly presented interesting actuators. Directly stolen from ...'s thesis made me roll on the floor laughing:) Best wishes from Bulgaria!
That telepresence demo was freaken cool!
Love watching all your videos! This one was very interesting, thank you for sharing and keep making these videos.
Pretty exciting. T-Motor has a very good reputation in the drone industry. Both my drones have T-Motors installed.
Lovin that Eee PC!
And it needs less than 10 minutes to boot!
As always a verry nice video and presentation of the motors! 😊👍👍👍
Thank you a lot! :)
As always a verry nice video and presentation of the motors !!!
another great video, yes those actuators did look pretty sexy coming out of the box.
Thank you so much, for this very helpful educational video. You are an excellent teacher. Super!
Thank you!
Очень классный канал. Третий день под впечатлением. Спасибо!
Спасибо большое что смотрите!
Awesome!
Amazing review!
You are an awesome inventor... Love you from India.
Those look very fun to play around with and try things
Perfect motor for a DIY scara robot arm!! Imagine the 3D printer you could make with that.
Awesome videos. Thanks
Thank you!
Just bought one. Will update soon
Hi, did you manage to get it running with Arduino (or similar) controller?
@@BoltzVideo HI what about you? How did you run it?
mayze forze bez with you :D
9:46
Ausgezeichnet!
Vielen Dank!
good work
Your videos are very cool! Thank you for that! I'm from Ukraine and I don't understand English well, but with your accent it's easier for me to understand!
Please make more robotics and hardware videos! I like and subscribe!
Hi @Skyentific! Really nice video! Could you share the values for the proportional and derivartive gains? At the beginning the values were Kp = 100 and Kd = 0.1?
"super simple" 😂 this is some amazing stuff, but there's not a lot of sub fields of robotics than can be considered simple in my opinion. This requires a lot of knowledge of a lot of topics, so don't play yourself down ^^. Thank you very much for making it understandable!
You could try using the STM32 you used for your DIY Mini Cheetah Controller as the brain. Most of the STM32 boards are programmable in the Arduino language and some even support CAN built in or have support for normal Arduino shields. And of course they are much faster than an Arduino.
I wish it was stronger but I love the controller I think it's better than the Odrive except for the lack of power.
Eric lamb ODrive have a lot of possibilities. This one has less control, but it is super easy and extremely fast.
Safety first, you are in the habit of taking your face too close to the moving arms, we don’t want you to get hurt. super good video, Thank you
Great videos! How do you rate this motor compared to the Gyems RMD X-8 you reviewed earlier. Any differences in build quality, backlash etc? Are they controlled the same way?
Nice, finally we can do remote arm wrestling.
Nice
Thank you!
Supercool, if I had three of these I would make such an awesome 3D-printer with it. But I assume these are way out of my price range. Also lovely to see how you can link them together and 'feel' the force that you apply on one end to translate into the second one.
I don't think that motor speed is a concern in 3d printing. It would be kind of an overkill.
3D Printer actuator must have no backlash.
If you really wanted to make an awesome 3D printer, you might pick low/minuscule backlash, mid-range speed, high stiffness, and a controller that focuses on precision and not torque or speed. AKA steppers. BUT the very fact that you saw this video and considered what cool things you could make with it, that’s what the world needs. stay inspired my friend
@@Mr30friends Maybe I love overkill :)
@@TheNamelessOne12357 This will be fine. Trust me. At the scale I'm thinking backlash will not be a problem anyway.
I like this style of actuator but they are all so expensive :( still geared dc motors and steppers for me!
Look at gimbal motors on aliexpress. Same style but much more affordable.
Still cheaper and more compact than a typical strainwave geared AC drive actuator used in robotics, and they get significantly cheaper with higher volume.
@@Alex-kr7zr Yeah progress is being made here for sure. It's just a bit frustrating as a hobbyest that the barrier for entry is still quite high.
Does these actuators require endstops and homing cycle when used in robot arm, or the position is always absolute and precise?
P Kav it is absolute in the range of one motor rotation (1/6 output shaft rotation). And you don’t need endstops, and you don’t need to do the homing.
@@Skyentific Absolute encoder? So homing and endstops are still required. Axis 1, for example, can turn much more than 60 degrees.
Interestion if stiffness and damper are P and D coefficients of PID controller respectively
С русским акцентом мне даже легче понимать английский язык :).
И с юмором, что тоже приветствуется!
Спасибо. Отдельное спасибо что не стали Мутко вспоминать :).
А я то думал почему мне все так понятно на слух. Не знал, что автор русский ;). Интересно слушать и смотреть, спасибо!
@@SABTEC Здравствуйте! А я бывший типограф, :) , в совдепии работал на ещё плоскопечатных машинах высокой печати.
Да-да, полностью поддерживаю)!
Русский акцент сразу ударил по ушам. Что бы убедиться в своей правоте открыл описание под роликом, но увидев там какого-то Yoyo Liu был крайне удивлен. Пока не понял что это просто контакт продавца.
What did you use for the P, V, T, KP, and KD max/min limits? T Motors website seems to list the same (most likely wrong) cookie cutter spec sheet for all their motors and also doesn't provide the KD/KP values at all.
Like everytime, Nice video!
Thank you!
Nice video, how do they motor know it hit something? like your hand in the minute 6.30 , is it a current sensor or something else? and how is controlling the stiffness? thanks in advance and thanks for the good content
First Comment I love your videos .from Bangladesh !
I confirm: first comment. Thank you!
Hi Skyentific, on Hackaday website there are threads talking about the Steadywin V2 model of Ben Katz motors being a poor quality with the built-in controller being very unreliable and inconsistent (1amp in one direction and sometimes 15 amps in the other).
Have you noticed any of these types of issues with the tmotor or gems motors? Do they seem to function reliably and consistently forward and back, etc?
Could use them to have adjustable dampening and ride height on an ebike. Price is eyewatering though, Maybe this technology will be more affordable in the future. Good video.
When you dont power those actuators from batteries what kind of power supply do you use for high amperage?
"Some power for me" lmao
what motors and controllers do you recommend for animatronics?
Do you have a PCIE / Ethernet / USB to CAN adapter you use?
8:02 Make windshield wipers!
There are at least 3 companies in China producing and selling MIT motors :
HaiTai Motor, they are the first company producing the MIT motor, as soon as the MIT opensource the motor.
ZhiQing Dog, they are producing the entire Mini Cheetah dog , and selling it at the price of 1.8W RMB, means 6000$. They have 3 diffrerent types of MIT motor to sell.
T-Motor , they just start producing the MIT motor this year , Skyentific is introducing this company here.
I put the like
Raphaël Casimir thank you!
Hi sir, at 3:30 i think the Kp, Kd and Ti is the coefficient of the PID controller of a closed loop control of the system
Yes, I think you are right. But when you say coefficient of PID, it is less obvious how to use them. :)
bilateral telepresence reminds me of the movie Real Steel.
That what I want to use to design barrier free openings ! Existing ones suck like hell
First of all, thanks for this informative video. Would you compare them with MIT Mini Cheetah, INNFOS, RMD x8, RMD x8 PRO actuators which were in your previous videos? Even though it is a hard comparison, it may guide us.
Please include ODrive also
*2x518 USD* .. Damn nice gift !!!
Can I know how you control the the two actuators to perform like that?
Hi, great video! But 1 question:
how did you do the bilateral telepresence? Couldn’t hear what you said in the video :(
Everything is explained in the master thesis of Ben Katz. And he took it from this paper: ieeexplore.ieee.org/document/1618740 .
But basically it is:
Torque1 = Kp*(pos2-pos1)+Kd*(v2-v1)-K*v1
Torque2 = Kp*(pos1-pos2)+Kd*(v1-v2)-K*v2
@@Skyentific Thank you so much! This is just great!
pretty cool, now do send it to another side of the room and try to control
Can you suggest any motor which has a linear ball scew actuator
Does it support multi torque in position control?
Can you show the movement at max speed? That would be interesting!
Эс олвейс, итс эн амэйзинг видео - грит джоб, френд! Сач э вандефул интрадакшен ин роботикс фо новайс юзерс, лайк ай эм. Рили апришиэйт йор ворк. Гритингз фром Юкрейн!
Spasibo bol’shoe. :)
where did he get that cool holder?
На башенных кранах КБ674А устанавливались сельсинов, один на двигателе грузовой тележки, второй в кабине машиниста, эта пара показывала вылет тележки.
Nice video! Do you have a link to the arduino CAN code that you wrote?
Hi, do you have similar motor? how did you control it?
Sorry if I missed something here, but is this using an FOC library?
Yes it is.
Switzerland or Luxembourg? (Judging by the eeepc keyboard)
Switzerland :)
When that Eee PC from 15 years ago was new... it cost about half as much as one of those motors =O
How are you doing with computer vision?
Can your DIY robotic arm write on pape.. if yes please make a video on that.. keep the good work..
It will be great if you put links on previous videos
Дмитрий Кравцов yes! You are right!
this might be out of scope...
but is that a safety goggles or your working glasses?
or both???
because it looks cool man......
Hello, good, I wanted to ask if the motor is only capable of controlling the torque or the speed and position can also be controlled.
Yes. You can put torque = 0, this will be position control. If you also set stiffness to zero, this will be speed control. But for speed control there is a drawback: it has a limit at how many turns it can make. It cannot rotate indefinitely like with ESC.
@@Skyentific Thank you for your response.
@@Skyentific Sorry I have tried to reproduce your arduino code but I have missed several errors when compiling, if it is not so much trouble if I could upload your code I would appreciate it.
Hi Jia, this actuator support "position control, speed control, and torque control".
@@jiachen3920 Hi Jia, did you make it work?
Skyentific: Easy!!
Me: ????
Question: Did this motor come with any cables? or do i have to create my own CAN and power harnesses?
I don’t know. I got 1 set of cables (CAN, power, serial) for 2 actuators. So it looks like half a set per actuator. ?!
One UART, CAN, and Power cables are included per motor package.
@@1119hayabusa hi, how do you control this motor? I have similar ones
Hi... Can we move it at different rpm...(velocity control mode) I want to move my motor at 1 rpm, 2 rpm... 10 rpm and 100 rpm... with endless rotation.
What battery can I use for AK80-9 motor?
What is the name of that shield that's being used with the Arduino?
He said "can bus shield" didn't hear a specific brand. However, I don't think there are many CB shields, and any of them would probably run the motor since it's an international com standard.
@@Scott_C Thanks. I noticed that later in the video (I commented too soon lol). I found one online from Sparkfun that looks identical.
What's the max RPM? Can it run as a servo motor, if so what is the CPR of encoder?> I want to DIY force-feedback game controllers for sim racing and flight sims
Hi, we started to experiment with these motors after watching your video. However, we find the operation to be noisy. Especially when you push it after setting some Kp, Kd values. Did you notice it as well?
Hello @Shivesh Kumar can you please tell us how are you controlling the motor and which controller are you using.
Hi Shivesh, same question here
2:29 OMG!! ASUS EEEPC!!!
Stupied question : Can i use them as a stepper motors for a CNC
Yes. But steppers are good for CNC. They are cheap, no backlash. And on CNC, you don’t need to have light motors. The feature of this motor: they are light and powerful.
Hello! Is it possible for you to share your code for the torque threshold and the bilateral teleoperation? I couldn’t get mine working properly and I can’t find good resources online besides yours! Enjoying your videos!
Hi, do you have also similar motor? how do you operate them?
Это подхолящий мотор для каких роботов?
awesome motors dont even want to ask how mutch they cost lol yep i looked damm lol
Лондон из зэ кэпитал оф Грейтбритан!
Hello, fist of all very helpful video, secondly, do you know of a way to program and control the motor using Python rather than Arduino?
hi Michael, did you figure it out? do you have similar motors?
How did you measure the backlash?
I attached long arm to the output shaft and checked the play at the end of the arm. It is not the real measurements, but rather estimation.
Skyentific makes sense brother. Very good idea :)
grabcad.com/library/t-motor-u15-kv100-1
Here's the CAD file for T-Motor KV 100 that I made a few years back.
I try to control AK60-60 in Ubuntu 20.0.4 with TMotorCANControl Api in python lib but check motor connection method return (RTNETLINK answers: Operation not supported). I have to install some driver? to make TMotorCANControl Api find Can0? (I use R-Link can protocol)
Thank you for uploading awesome video !
In this video, text is output on TeraTerm right after connecting power supply, but it doesn't happen in my environment.
Can you think of any reason for this?
Hayabusa Js For me it was always immediately after I connect the power. Are you sure that you connected everything properly? Receiver, Transmitter and ground?
@@Skyentific Thank you for your reply, sir.
I am using FT234X USB-serial converter module and re-checked the connection and baudrate and so on, but it still doesn't work...
Simple question, but just to be sure: do you connect. Your connection should be like this:
Ground - Ground
Tx - RX
Rx - Tx.
Transmitter to Receiver, Receiver to Transmitter. Please check this. According to 2:12
@@Skyentific Yes. I did a lot of checks.
In this case maybe try another usb-serial converter. I don’t know. It should work.
I had a problem when I was connecting it first time. Because I was using wrong cable (ground was in the place of receiver. And receiver was on the ground place), But on video it is shown correctly.
@Skyentific, please also share the code of this demonstration.
Hi sir, all your videos are Excellent. I want to make a 4 DOF robotic arm of 100 cm reach and 1 kg payload. Are these T motors good enough for my Arm?
Thank you. No, you would need more powerful actuators. These actuators would overheat quickly with such load. You would need to use actuators with at least 15Nm rated torque.
store-en.tmotor.com/goods.php?id=1030 this one should work for you. But you will have the precision of around 3-5mm, due to backlash.
Or you can use these actuators with additional reduction stage to increase the torque.
@@Skyentific Thanks a lot sir for replying. Can i use servo mentioned by you store-en.tmotor.com/goods.php?id=1030 directly at joint without using harmonic gear system and which controlling board you prefer to buy for easy controlling of 4 such servos for my robotic arm. Thank you in advace
karry venkatesh yes, in my opinion this actuator should work, but your entire arm should be light of course!!! To control you can use arduino with can bus shield or teensy with can bus shield or stm32 or many others. Arduino would be the most simple. Teensy could be a good compromise, relatively simple and quite powerful.
What is the price of this actuator
When chaining the motors together, is there a trick to the CAN Id and Master Id settings on the motors? I can talk to a single motor fine but when I add another motor in (including the termination 120ohm) I can't talk to any of the motors?
You need to change id. By default they all have id=1. Master id is usually equal to zero.
I am actual working on this right now. :))) chaining 3 T-motor actuator.
@@Skyentific Thanks very much for your comments and your videos! They've been very helpful. We're working on a camera gimbal system.
@@Skyentific I think I'm having problems with our 2 chained motors because the CAN port broke on one after some unexpected operations in testing :(
Chaining 3 motors works fine as long as I don’t use id higher than 3. For some reason the id 4 and higher (i tried 4, 5, 6 and 7) does not work for me.
Hi, how to callibrate the motor? I could not find the software. Maybe we can callibrate it without the software?
I try to follow the steps by connecting it to terra term through the ftdi board. But no data comes out
how did you make it control?
Вот интересно какую скорость номинальную оно имеет?
Ньютон-метры это конечно интересно, а RPM то умолчал
365rpm, I don’t know where you need to have such high rpm. I don’t pay attention at rpm of QDD actuators, because they usually have enough rpm for most of the tasks.
Is T-Motor better or GYEMS better? please ignore price consideration. thanks
My opinion: Gyems has better mechanics (looks more solid, less backlash), but T-motor has better electronics (easier to control, more possibilities). I even think about taking Gyems actuator, and putting the better electronics (controller inside).
@@Skyentific thank you, you are a genius
That's a pretty cool actuator, but at $569 USD?! 😬
Show us the maximum speeeeeeed please.
May ze force be viz you 🤣
Ohh russian accent👍. You reminded me USSR scientists, who were living only for science itself
Yes, comRade! I undeRstand you. I live foR Robotics. :)
I know these are quality actuators but the price is way out of the range of most hobby projects. Unless you are building some high priced professional product you will be looking at a much more affordable option such as the brushless gimbal motors on Aliexpress.