Huge Servo as the Robot Actuator? (Super300)
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- เผยแพร่เมื่อ 18 พ.ค. 2019
- I have tested the torque from the huge servo of my last video. According the specification this actuator should have 3kg.m load. Can it really handle this torque? The answer is in this video.
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#Robotics #Servo #Actuator - วิทยาศาสตร์และเทคโนโลยี
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Love you sir ... Very informative video ..
Love from India ""
I'm 15 and I love robotics. your videos are fantastic and they encourage me a lot
I think you calculated wrong. The length of the arm is longer the second time. But in your calculations you took the same length for both of the cases.
Please sir what type of servo motor you advice me to use for a high tech and torque robot project with arm length of 70 cm to lift 2 kg for this arm length with zero backlash?
@BLAIR M Schirmer I agree. I thought it was $17 and I was very interested but I have realized it is $70. I also agree with the need to share more information about material, equipment, etc used in the videos.
"This is bad, I can't repair this. Oh well, at least we learnt something" priceless!
I just saw another video about different gears. Based on that, I wonder if herringbone gears would not fail. Those kinds of teeth are apparently the worse possible choice for high-load gears. Herringbone gear teeth have much larger surface area and better meshing profile that means the teeth are much stronger. That failure though - the whole gear shattered. Maybe just "not crap gears" would help to :-)
It's great to see someone providing useful technical information on robotics/mechatronics, thank you sir.
Thank you for your comment!
i like the videos where you test servos, a lot of us just buy servos and pray they work to at least half the specifications. without really knowing the limits.
Thank you so much for testing this servo. I was about to buy one for a robot arm project which needed quite a bit of torque. Unfortunately I do not know if the specifications is up to par, and I can't afford to loose 70 bucks.
In the spec of the Servo is given the stall torque. In the test it was dynamic torque. The dynamic torque has to be much lower than the stall torque by every servo.
The safe way is to use the servo at 50% of stall torque, because "dynamic" can have a wide range.
One thing I really like about this channel is that, instead of weights, you use common foodstuffs and there's just something so lovely about that.
Thank you! This is first stuff which I found :)
Thank you for the sacrificial test sir
Interesting test! Thank you!
Thank you for your comment!
It was interesting to see how the inside looks like. Thanks!
Thank you for your kind comment!
its really real engineering thank you so much !
Thank you for your comment!
your test is always interesting.
I use 4 similar style 12-24V servos on my remote control snow blower I built 2 years ago. They are still working very well. I found HAMMOND die cast aluminum cases to fit them in and keep them waterproof. I machined the lid and epoxy fit a 3D printed cap for the motor sticking out, and also printed a gasket seal with flexible filament.
I'm 15 and I love robotics. your videos are fantastic and they encourage me a lot
Thank you! I am very glad to hear this. Robotics is the future!
@@Skyentific I think like you, I have already built a small robotic arm with arduino and 3 servo motors printed in 3D. Soon I wanted to make a 5/6 axis arm with stepper motors
Showing the practical stuff and the math behind is what make your videos so good! An excellent material! A shame that the motor gear broke :/
Thank you for such kind comment! At least we found the limit of this servo :)
Hello from the UK loving your channel, could you tell me will 2 of the 500 versions be enough power to move a motion platform for one adult ? Thank you, all the best 👍
very good video, real world results.
hello! its nice to see this kind of reviews! i buyed one, and i have some Doubts if it works.
thank you for the aportation. and i appreciate if you can answer this question, i want to control the servo with arduino, and theorically it must work but i dont know if you are tested before.
42 kilogram per meter = 42 kg/m
42 kilogram meter = 42 kg.m
Yes, you are right.
The actual meaning and functional application of these units is hazy for me. They do not seem to translate well into things I can use easily mentally.
William Wallace Well it is actually a very convenient simplification to intuitively convey a sense of the “strength” of an rotational actuator. Just read it as “able to lift a mass of n kg suspended one meter away from the output shaft center”. You can then simply deduce that it can lift double the mass from half the distance, or lift half as much if the arm is 2 meters long. Torque standardized unit is N.m (Read newton meter) but using kg.m is nice because we all have a sense of the force gravity exercises vertically on one kilogram. (And some people still using archaic units probably have some sense of what force gravity applies to a T-bone steak suspended 1/72 of an Australian football field away ;-) )
The gears are not hardened, I believe if the gears are induction hardened or replaced with similar harder gears it will easily take that kind of load
Very nice demonstration, thank you sir
Is this a good usage for a DC motor? I thought, that holding torque without actual movement (or even worse with small oscillation) would damage the comutator/brushes.
It would be nice tho. Really simple and cheap design. With encoder modification we could get continual servo motor for really cheap.
Think YOU
Thank you sir for the video.
Could you, please, share the link to where to buy this servo?
Thank you in advance for your help with this request
Best regards
Hi,
Do you think this type of servo would be in any way suitable for a delta robot?
Thanks.
Can u please make this type of studies on dynamixel pro plus servo ....we want to know their maximum capacity........:)
well that's a nice info
Nice video!
Thank you!
you are amazing
Very interesting thank you for sharing the video, I have a question: can we connect two or more servomotors un parallel to increase the torq?.
It is possible, but you need to synchronize them. The best way to set one as master and another one as slave.
@@gb614erg Thank you for your answer.
maybe i can get a answer here so i have a robotic arm that uses 1/10 scale rc servos but they too fast for what i want it to do and i cant find a very slow servo this size what would be the 1/10 scale stepper motor equivalent?
Can you show me how measure gears to make gear box ,like servos to hold some kilograms ,maybe i want hold 30 kilograms by small gearbox,,,,,thanks
классное произношение)
4080 V slot C beam with rollers inside gantry...how much maximum load it can take how to find that
Can a super 500kgcm servo motor carry more than 10kg for 35cm plate?
thx
Great video! I guess there's zero safety margin on that torque rating :) You may have just hit 30Nm, factoring in the weight of the arm and inertial force. Probably best to keep under 20Nm for long life.
Pretty fancy having helical gears on the first stage at that price. Probably reduces the noise by a lot.
18RPM looks a lot faster than I would have expected. I guess the giant dangerous aluminum arm amplifies the apparent speed :) You scared me at 5:30, putting your body in the path of the arm while plugging it in.
The backlash is too much for a robot arm, but for lower precision applications it seems like a good deal.
When I was editing the video I also thought that this was not safe switching it on like this :)))) I was also impressed by the speed, I though it would be slower. Thank you for your comment!
We used such servo in our application, one of reducer gears damaged very quickly, internal gears are too tiny to handle the load.
Exactly!
where did you buy this servo from? how can someone find it in ebay?
@03:16 Does anyone notices that this robotic is ramping the motor in its closed-loop system. Despite the backlash, this is quite good. By replacing the bushings with bearings, the backlash can be minimal.
This backlash is coming from the mechanics (gears have some play). I don't think it is possible to easily correct this with the electronics.
Great video, You should break more stuff!
Hi my friend i want a big servo like that where i found it?
you may be able to find a replacement gear, look at Mootio Components (just a site i googled, but you can do a search, yourself). for just a few dollars, you may be able to repair this puppy. itm, you could print a 3D printed part as a temp solution. if it were me, i'd find replacements for all those gears in metal, not plastic (or they may be nylon, but whatever).
love your stuff, including the work you do on you vid production...
keep up the great work!
Russ from Ocala, Florida, USA
Although that gearbox does no look like it could handle 300KG, I did notice the arm wobbling before the gears cracked! Meaning that forces may of been way more than 300KG and could of been 600KG. Maybe you should of had a digital fish scales connected to the string, so we could of seen the true forces, but helpful advice any ways, thanks :)
This looks familiar to what I bought on Ebay. I think it is sold under many names.
So not only the white gear, but more gears seem to be plastic! How can that be on such a size
what about the arm how much does the aluminum weigh?
That torque is about equal to an adult curling a 15lb dumbbell. Fascinating!
i tried to make 3d filament extruder using the similar gearbox, there was described 90kg/m, but the gear in the same place as your was broken in 50kg, but it is a bit funny because it seems like a special thing gear which should be broken to support the market...
Skentific, another good presentation, i have got the super500(less than 42$us...including delivery), the only thing
short coming it has is this: the "driver"/"encoder" board it has ...mounted on the wrong place, if it was mounted
vertically, then one can extend the shaft in the opposite direction...that could extend some stability, as one can
then use a "U" shape ... how ... i will try to figure that out after my return from oktoberfest in munich hahaha
and i did give you a thumb up
Can a super 500kgcm servo motor carry more than 10kg for 35cm plate?
Hello... What is the name of the controller?
There is another version of it - SUPER 500. You should test it if its true what they say about it :)
I just bought 12 of these to make a pair of robotic legs. Only £26 each on Ali. I think they will need to hold about 2kg at 50cm when moving so I think they are going to work. I’m also going to stabilise the output axle with a second bearing so the axle doesn’t bend under load. I think this will add stability.
How did they end up working for you? I'd worry a bit about the amount of back force in these motors.
@@peytonmac1131 Haven't touched them due to various life events. Coincidentally I just started printing parts for this project in the last week, having just got my printer back online. Only did a couple of moving tests with these , but so far they seem to work fine. Will let you know when I have got one leg built.
Looking at the same Ali express page - the price has gone up significantly.
@@dwrobotics2180 Aw, life. Always getting in the way of doing fun things. Good luck on the build, and well done on getting the motors before the price hike.
@3:33 Cool! How did you get permission to use the "International Kilogram Prototype"‽ I thought they kept it in a Bell jar. 😃
Please urgent; how to control it by arduino ? thank you for your good work
It is absolutely the same as any other standard servo. The only difference: you would need to have additional 24V power supply.
@@Skyentific thanks for reply; I used to work with mg995 servo motor; it has three wires; one for signal (PWM ) and two other for power ; but this servo has 5 wires? might you explain more please?
Easy: 3 wires are the same as other servos (three thin wires). And two wires for the additional power supply. You can see it in the video. This servo is very powerful, that is why it needs additional power.
@@Skyentific Thank you very much your channel deserves hundred thousands of subscribers, my issue is the three wires are one for PWM and the two other attached to power source; so there would be two power supply?
@@diyrobot9455 Yes, there would be two power supplies. Through the PWM wires you would power up the logic board (it does not require much power (thus low current). Through the two additional wire you would power up the motor, which need some power (thus high current).
It might handle that 300 kg cm torque if experimentator took the weight of the lever into account. We see the lever was made of two aluminum profiles that weighs
Did you get this servo from Alibaba? Curious what the part # is.
I get it from the Aliexpress. If you need I can give you the exact seller.
Remember to add the weight of the heavy aluminium arm to the total weight calculation. 🤓👍
Спасибо вам. Вы молодец! Удачи!
Спасибо!
I suggest you (i know you will...) to hack it by replacing the bush with ball bearings. A cheap, easy, realiable, and fast hack. That will surely reduce that nasty backlash in a great amount (except that natural backlash produced by gears cogging)
Yes this is great idea. Unfortunately bushings have very strange dimensions. I cannot replace them easily. The casing from the servo should be machined to adopt the standard bearing. (bushing outside diameter is 15mm, and standard bearing has 16mm diameter)
3 kg.m. is a lot :)
Do you think OpenTorque Actuator is the way to go?
Yes, but OpenTorque cannot hold this torque for long time. It heats up very quickly...
You don't add shaft weight 😊
I would guess that your dynamic load was much higher than 3
why not use a cordless drill? It has high torque and could be sensed e.g. by a potentiometer with a gear.
Yes, one of the viewer already proposed this. I will decently consider this.
Links for the servo motor ?
Try to search Super300 on Aliexpress.
@@Skyentific Thnxs ! Found it, even on TH-cam there are a few clips. Awesome !
Please share link, ı didn't find this motor
I bought this servo to try it out. Mine doesn't have as much play as yours has. It really has almost no play at all. So perhaps this varies per produced batch.
Could be. I have only one so I cannot say exactly. May be I will try to buy the same model from other seller...
Does this servo works with arduino please?
@@diyrobot9455 It is a normal servo so yes this should work with arduino servo library.
@@ctrlaltdude thank you very much; I mean it has five wires; might you tell me how to connect them with arduino?
@@diyrobot9455 Well it's a normal servo connector only with 2 extra wires for 24V power. So google for arduino servo and that will give you all the required info.
What are the gears made of?
Great question! It is made out of powdered metal, that is why they are not very strong...
@@Skyentific why wouldnt they make them out of stainless steel or smth stronger than the actual material
Have to say that this very strange positioning. Setting of 90 degrees will set approx. 75 in real. So you cannot set a real middle point. Moreover, moving +-1 degree from one point will result to different distance trip.
with your super300 gear broken what do you do? maybe you could try to print 3d gear with carbon fiber and see if it can work great! lets rock :D
with your super300 gear broken what do you do? maybe you could try to print 3d gear with carbon fiber and see if it can work great! lets rock :D
It's a shame it's hoopajooped, cause now I'm wondering about the potentiometers on the circuit board. Trimming for software end stops?
Also I'd love to see the board in more detail. See if you can use it in your own gear trains 😃
Very nice content! Can you please fix your audio? When you talk it gets clipped quite heavily as if you had way too much gain on your mic. This would make it a lot easier to listen to your vids - right now your "HELLO" at the beginning makes my ears ring ;-) Thx.
Yes. I will try. I had the good level when I edited video. But when I uploaded it get a problem. I will try to correct this next time. Thank you for the feedback!
You forgot about arm weight!
Finally you had much more the 3kg!
No. I did not forget. I took this into account.
Тоже столкнулся с главным, и непримеримым косяком этои сервы-при подключении логики серва делает дурной рывок в обе стороны, градусов на 200, что совершенно перечеркивает вс е её плюсы?!
you should have a cooking show.
9:41 they had 1m long cable that was rolling on shaft they try 6kg and there 3kg come lol
Thanks for the great videos. I am trying to use the Super300 as well as the similar JMT 200kg servo (www.aliexpress.com/item/33010894765.html) to power the steering of a trolling motor in an autonomous boat. My problem is that I am unable to figure out how to use the internal pots on the controller boards to set the angular range and midpoint (+-150 degrees desired). Documentation on this is non-existant and I am seeing little to no effect from my trial and error settings of these pots. Do you have any insight into that ? Also be great for you to test the JMT 200kg servo. It appears to have less lash and gear noise, and looks even better built than the Super300.
Please.... 0.21 is "oh point two one" not "oh point twenty one"!! Great channel! Love the work!
Thank you for correction. I will try to remember this!
they measure it 500mm length bcoz 3 kg move 1000mm in 180 turn LOL and if they say so. its 1.5kg.m that what you need think when buy.who buy motor that move needed load barely?!
So the servo did not give 3kg-meter? What is the torque required to keep the aluminum arm at 90 degree? Surely aluminum arm was not weightless thus needed torque to hold in horizontal position. Isn't that the missing torque in your consideration.
You should have used balanced arm to demonstrate and come to unambiguous conclusion. Other than that it was a good video. .
Man, I have PhD in physics, you think I did not take into account the weight of the aluminum arm?!
You did forgot to add the integrated wight of the aluminium beam. You may got even more than 3 kg in total.
No, I did not. I added additional 0.29kg.m. This comes from the weight of the arm and its centre of mass.
@@Skyentific Woops my bad. I did not notice.
I bet the whole thiing would break in half if you hang 300kg directly to the shaft 😅
Totally agree! :)
u know its shit if the gearbox breaks under its own power
>300kg cm gear broken
You didn't factor in the weight of the arm.
What do you mean? I took into account the torque of the arm (it has its own weight and the position of centre of mass).
@@Skyentific I'm sorry, I must have missed it. I only heard you talk about the weight of the food. I love the work you are doing and look forward to more of your projects.
Твои самодельные лучше
Спасибо, я все еще продолжаю их разрабатывать :)
Хороший был привод(
Зато теперь знаю на что он способен :)
@@Skyentific Для манипулятора однозначно нужен безлюфтовый редуктор - иначе с увеличением плеча точной повторяимости позицианирования недобится. Может все же червячный редуктор? Есть решения в чпу станках с подпрежиниванием червяка. Очень нравятся твои видосы. Жду продолжения. Спасибо.
Я всегда считал что червячная передача очень сильно греется, так как у нее большие потери на трение. Но сам я ее на практике еще не использовал (хотя у меня где-то валяется старый червячный редуктор, может достать его и потестить?).
@@Skyentific Еще есть безлюфтовые решения с подпружиниванием шестеренки с косым зубом, но шестеренок будет навеное больше чем в редукторе из этого видео. Даже не знаю позволяет ли современное качество поверхности зд печати и твердость материалов напечатать редуктор с косозубыми шестеренками. Опять же сила пружины должна быть не меньше силы прилагаемого момента нагрузки. Эти силы могут быть значительны и вызывать дополнительные силы трения, что внесет необходимость скажем так, учитывать их при разработке). Если найдешь как рассчитать волновой редуктор, то попробовать напечать его былобы круто.
with your super300 gear broken what do you do? maybe you could try to print 3d gear with carbon fiber and see if it can work great! lets rock :D
with your super300 gear broken what do you do? maybe you could try to print 3d gear with carbon fiber and see if it can work great! lets rock :D