Robot Actuator (Brushless Motor Robotic Joint) 

Please, do not hesitate to leave your comments!

Putting this video in my sources for my Engineering presentation project at school. Tysm!

good work!! warning with the temperature, motor can be hot in less than a minute and plastic melt down!

Hi, I love your projects, you inspired me to study robotics engineering in university. I hope you will publish all the info to make this project for people like me who love your content. Thanks for sharing the video Nicolas from Italy

Congrats, you should to make a hubless wheel with a brushless motor and gears, i hope you make it.

I clicked on the video just to see how the bearing was placed inside and what bearing you would use.

Great modular design. Using the O drive on the second shaft is an excellent idea and use of space! Looking forward to seeing this project develop!

Этот чарующий английский)))) Не со зла, просто забавно))). А за видео лайк жЫрный.

Awesome !! This is really interesting ! Please continue (hurry up!) with the build of the complete arm !

Can use the slewing bearing assemble for a small solar panel tracker on a parked electric vehicle. Of course with more gear reduction and more electronics.

I'm a big fan of 3-D printing but the parts that are going into this project completely outclass the plastic. For me it would have to be an aluminum body and steel helical gears to justify the other parts.

Добрый день ваш акцент застовляет меня предположить что вы с России:))

Thank you for such great videos and the ability to download the cad files with pattern membership. May I suggest you include affiliate links to the components in the description so as to help your viewers and earn a little money for your channel as well.

looks awesome. I like that you left room for a bigger pully on the first reduction stage for more uses.

Nice engineering, printed parts and video. It really shows how you can take an idea and make it using a computers and 3d printing or whatever form of manufacturing at home.

Great video!! Looking forward to this series. One question: Will you be making this project open source?

OMG!!! That is awesome!! I learnt some new things. Thank you so much for making this video in English! :D

Great application for those bearings. they're not suitable for higher RPMs in rapid movement applications, but allow for very compact, robust assembly. neat stuff!

Can't wait for metal 3d printing stuff like this would be amazing

Вхэри ис фаилэ фор 3 дэ принтер. Олсоу Ай вонт ту ноу, вхэри а ю ту бай сач бэлтс? тсенк ю фор ёр видео. Сия лэйтер гудбай!

FANTASTIC.....AND BEAUTIFUL...KEEP UP........

Beautiful design! One question though: Are you sure that that motor can produce 1 Nm of torque? Is that peak or continuous, or perhaps stall? At what current? Having worked on things like this before, you need much larger motors to consistently produce that level of torque. Looking forward to seeing future videos!

Very elegant. Thank you! Perhaps someday you might consider making a video on creating 3D printed gears in CAD (teeth, ratios, etc).

Видео супер очень нравиться, особенно цветок , вам бы комент к скейчам оставлять и скетчи . У вас есть чему поучиться. Желаю побольше подписчиков.

This is a fascinating and brilliant concept for a robot arm!

Если бы ты разговаривал на русском то тебя даже англоязычная аудитория понимала бы. The bearing))) А так like.

I considered using brushless motor for robotic arm application before. But it seems to me that position control is hard to achieve with these types of motor as their rpm quickly ramps up with increased voltage. These kind of motor’s temperature also rises quickly after running for a while. Really curious how you would address these problems. Keep up the great work!

Just donated a small amount for the good content you post. Good luck in getting more subscribers!

I can't help but think that motor would tear the plastic apart if running at full load. Try cutting the frame out of 7075 or 2024 aluminum instead!

Excellent work man! Thank you for share your knowledge!

О, наши люди. Это радует.

Very nice work. I wish I didn't have trouble with your accent, and on screen coding at the same time. But very good work. Thank you.

Подписался) очень интересные ролики. Я, как и многие другие были бы очень рады переводу ваших роликов хотя бы субтитрами, а то автоматический перевод просто смех наводит. Благодарю за интересные ролики, пусть и больше половины не понимаю от незнания языка

I would love too see this scaled down for smaller robots

Awesome video, keep up the great work! I am working on a mechanism of similar design. Originally I used the same mxl belts that you showed in this video but I was having a lot of trouble getting the tension right with a simple idler, especially in the interface with a 3d printed pulley under high torque. I suggest you make the switch to XL belts (teeth 1/5" apart, the same size as the timing belt in most automotive coolant pumps iirc) if you end up running into the same issue, the difference was night and day for me. Also you may want to try using some type of lead screw mechanism so that you can really put some force on that idler since its probably going to be difficult to get enough tension by hand and in your current configuration will likely creep in its slot causing a loss of tension over time. I am using automotive tapered roller bearings for my joints (probably overkill) and I found that they need a significant preload in order to function properly so I have a dedicated flange mechanism that pulls the two sides of the bearing together which works but adds unnecessary weight. Like others have said I am interested to see where you got that bearing, it looks to be a good solution.

Thanks for these video series, they are really inspiring. Every printed part looks quite clean and accurate, may I ask you which 3D printer are you using for them and which filament type should be used?

Thanks for the video. Good job. Only 84% of Robot Arm building to go. :)

О, вы из Англии!

I’m excited to see how you hand the PWM and encoder, also how did you decide on what gear ratio to use? Love your work!

U building some incredible ., awsum and so so cool robots .. can u plz make a video on how u started with robotics , becz I would love to know how u got into this field.

great video, how about some links to build list and any downloadable file links for the print? that be very helpful

@Skyentific Why don't you make a video of 3d designing of the model you used in the video. It will be great.

I'm loving your videos, they're brief and very informative. From these videos it seems like you're building something bigger. Can you show us what is it ?

Thanks!

Very awesome ! Thanks for sharing this build !

good video. id like to see a powerful roboarm

Great design

bay-ding is bearing for the new folks

That looks pretty cool!

Very nice design

What materials did you use for your 3D Prints and what printer did you use to get the prints so nicely done? Superb Job by the way, EXTRA!!!

expert

It would be nice to have a list of the parts and also a link to a supplier.

Great explanation. I`m new to the robotics field. I`m designing a 6-axis robot with harmonic drives. I`m planning to implement the robot as a hand guiding for position teaching. Since harmonic drives has high torque, is this possible to do with stepper motors? If someone has an idea about these things, please leave a comment.

Really nice design. Would love to see a cad walkthough

now you need the planetary gear set

Фор маза Раша! Фор хом кантри!))) Мне тоже приходится на работе общаться на инглише и я тоже рэкаю и зекаю, а коллеги смеются с меня, хотя в основном это поляки и индусы, ну и два китайца. Но говорят как настоящие англичане или амеры, особенно поляки

Hi, why brushless motors and not cheap servos in stepper sizes? I just bought 3 JMC iHSV57-30-18-36 180W integrated servos(with driver) for my CNC mill. I paid 240€ including shipping. They also have 100W and a 150W version. The come in Nema 23 size with the driver hocked up tot he chassis. You can easily control them just like real steppers. But they have massive torque and you won't lose and steps as they have an encoder as well.

Impressive work and very clearly explained . Thank you.

Anything is only as strong as it's weakest part. I realize this is a prototype, so I hope you plan to assemble the real thing with splined or keyed shafts. Anything else would be too weak to take the torque. After that, assuming you can hold a decent sized arm with that motor, the belts will be the limiting factor for how much 'strength' it has, and I have my doubts about those belts. Have you considered a screw-type drive gear instead?

Can you make a video what kind of 3d printer you use, and the plastic you use to create the printed material?

Great Video...................

Great work ! keep going pls, блестящий дизайн !

Where can I get this construction set or a model of it for 3D printer?

Very nice! Cannot wait to see it in action.

Hi. Regards from México. Which model is the bearing?

Just discovered your channel. It's one of the best robotics channels I've seen in a while. It shows the right kind of information. It would be even better if it was enriched with technical data such as plans and schematics only for the interested. I have uestion: How precisely can the rotational positioning of the platform be controlled?

Nice! can't wait to see that thing going.

It would be interesting if you provide links to te compones you are using in your builds

Very interesting.

wow nice

"...and also beautiful..." 😎

Да ладно,видио реально интересное! Акцент да,заметен.

Brilliant!

hmm, why not more stages? without tension pully, 3x3x3x3 is 81. Should be cheap and reliable

Will the brushless motors allow your arm to move with greater speed than the stepper motor based one? If you had to hypothesize, how long do you think it would take this joint in a full arm to rotate 90 degrees at full speed?

Oh this is cool and universal little thing. You need to do some sort of torque test for it. How many kgs it can lift with how long arm?

Wow man , thank you

Where did you get the bearing from? What's its specs etc?

I had no idea BLDCs are so much more efficient than steppers. You would need a huge nema 23 to get to 1 Nm.

Hi, Very nice build! Why did you place the encoder on the intermediate shaft instead of on the motor shaft? Thanks.

Nice video! Great inspiration! Thank You!

May I ask you how could you drive the actuator? By ESC or some custom driver?

STL files would be nice, also where to get the non printable hardware

brilliant video thanks what do you think of harmonic gearing ? why an idler on one belt and not the other ?

Please tell me the specifications of the BLDC motor used in this project :>

Can you name all things that you have used to build this actuator?

Why did you choose to use two belts instead of one belt directly from motor to joint?

are the parts made form abs? becuse PLA is bad when it comes to heat.

the quality of the printed components looks great! which printer do you use?

Great job, thanks for sharing!

Your channel is great, very profesional and neat builds. I can't wait for next video.

Very cool

Great work! Could I know what encoder you use?

nice, I was thinking of doing this exact same thing for a 3d printer. I subbed.

Just wanted to say your channel and content are top notch, I became a patron :)

Super cool! Are you going to design a new 6dof robot arm with brushless motors? :)

Is that 3d printed parts enough to endure that? I recommend you to use carbon based filament. Now i am using ONYX and fiber reinforced filament made by Markforged.

I did not hesitate. Also, where do you get your belts and pulleys?

Hey man, nice mechanical concepts that you improve there. Really like the way you project that arm components. Kudos from Brasil.