3D-printed high torque servo/gear reduction
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- เผยแพร่เมื่อ 16 ธ.ค. 2018
- This servo/gear reduction uses mostly 3D-printed parts. The servo uses a 775 36V 9000rpm brushed DC-motor wich is driven by a BTS7960B motor driver which is controlled by an Arduino mega 2560. The stall torque of the servo is about 55kg/cm wich is about 5.39 Nm. the peak current is about 18 amps when using a 6s LIPO battery (about 22-24V). the reduction ratio is 1:30. I originally wanted to use some 20mm ball bearings for the outputshaft but they didn't arrive in time so I ended up using two 20mm holes and some lubrication so the shaft can rotate freely.. For the intend of filming the internals of the servo for possible faillures, I printed some collored gears and lasercut a 5 mm acrylic lid. Unfortunatly I didn't get to film any awsome footage of gears exploding because they were far to strong ;-). Even at a peak torque of 54kg/cm they didn't show the slightest form of flexing or cracks. The two middle gears (blue and red one) use a stainless steel shaft of 6mm diameter. The holes of the gears are designed at 6.2mm diameter so they would fit nicely around the 6mm shaft but some additional filing/sanding might be required. The same might has to be done for the 20mm shaft holes.
STL and Fusion 360 source files can be found here: bbprojects.technology/collect...
More info can be found here: bbprojects.technology/blogs/p...
My PayPal: paypal.me/BrockenBrian
Tools used for this project:
SMD rework station: www.banggood.com/YAOGONG-8878...
Infrared digital thermometer: www.banggood.com/AKKU-Infrare...
PLA filament: www.banggood.com/Creality-3D-...
Recommended 3D-printer: www.banggood.com/Creality-3D-...
Components used:
1 × 775 Motor DC 12V-36V 3500-9000RPM Motor Large Torque High Power Motor
link: www.banggood.com/775-Gear-Mot...
1 × Arduino nano V3
link: www.banggood.com/Geekcreit-AT...
1 × L298N motor driver
link: www.banggood.com/Wholesale-Du...
1 × Heat shrinks
link: www.banggood.com/328pcs-Heat-...
2 × stainless steel shaft
dimensions: 6mm diameter, 70mm lenght
2 × M5 bolt and nut
dimension: 40mm lenght
1 × 20mm steel tube
dimension: 125mm lenght
2 × screws 15mm lenght
dimension: 4.5mm diameter, 15mm lenght
5 × screws 35mm lenght
dimension: 4.5mm diameter, 35mm lenght
If you're wondering how I do what I do and how you can get started creating your own prototypes I wrote a basic guide about it.
Part 1: Mechanical design can be found here: / basic-guide-to-start-d...
Part2: PCB design can be found here: / basic-guide-to-start-d...
song used in the video:
Dreams by Joakim Karud / joakimkarud Creative Commons - Attribution-ShareAlike 3.0 Unported- CC BY-SA 3.0 creativecommons.org/licenses/b... Music promoted by Audio Library • Video - วิทยาศาสตร์และเทคโนโลยี
I've created a Universal Motion Controller - UMC to have position control on this servo. Video can be found here: th-cam.com/video/ek0E6k3FHqc/w-d-xo.html
I am in awe. Will be printing AND putting a potentiometer so it is a feed back servo. Well done!
Thanks man 😉👍 it should work great as a servo with that potentiometer on it
Cool
plexiglass catching fire was FUN!!! and thank you for sharing!!!!
you just earned yourself a sub. you deserve it bro, looking forward to see what else you come up with.
thats great. quite a bit of torque coming out of it
how just HOW do you only have 4k subs..dude you're a genius :O
Now its 28
Great job. Excellent mechanism. Only, torque is Force * distance, and you are expressing it as Force/distance.
This is what TH-cam is all about: sharing great ideas.
Very nice project and engineering..thank you very much..
Thanks man ;-)
Great work
Omg, is a very fackin good, обязательно сделаю также))
Thanks man hahaha ;-)
Great 👌👌👌. I am giving you an idea to use this gearbox. Use weight to generate electricity . This should use any heavy object lifted to an elevation. The project should devise a mechanism to control its descent at uniform speed. 😊
Wow! Great work and a huge inspiration for the future!
A question: what about high ratio dual cycloidal drives?
Hello Haensel, never thought about using these but now that you mention it, yes it would be possible. I would have to do some more research on this and would probably have to design a few prototypes first before i get a working model. Thanks for the idea, this would certainly be an interesting project.
Very Good!! Thank for sharing!!
Thanks man ;-)
Amazing👌👍
Thank you friend for sharing your knowledge. Success for you and your family. From Brazil.
20190325
Thank you very much João E. Oliveira ! ;-)
Very good thanks for sharing! What is the minimum gearbox ratio to be able to pull 200 kg (supermarket trolley) with 15 cm diameter (7.5 cm radius) front wheels with two 200 watt 24 volt (4200 rpm) dc motors installed? I couldn't find the right formula can you help me pls? By the way I want very low speeds like 24 rmp. I need 147 Nm right? And with friction issues is it enough to install 32:1 x 6:1 gears?
100 like... I was searching in net for some thing like this
You’re welcome haha. I’m glad you like it ;-)
Great content bro!
Thanks man ;-)
@@BrianBrocken your friend retsetman... Is now my friend also😀
Haha that's awesome man, building a youtube fam ;-)
Very good
Thank you for sharing your knowledge! I have a small project that needs some gears. Can I use acrylic gears which are cut by CO2 laser cutter!
Probably yes, I haven’t tried it myself
Thanks!
HI ! excelent work in both servo designs (this one and the newer one), what kind of lubricant are you using with pla printed parts?
thanks in advance
@caslor, thanks, i just used some regular bearing grease i found in my local hardware store. It might not be the best grease for PLA plastic, but so far haven't had any issues with it.
www.werkenmetmerken.be/nl/griffon_kogellagervet/p/190/?gclid=CjwKCAjw8-78BRA0EiwAFUw8LM-iW7skSEt__Of6-qZLY_vmFlZ8HVXbPGPhIN9zCNw5XXHqBS38TxoCf20QAvD_BwE#283
Hey man, nice work!
What software did you use for the 3d model?
Thanks man, I use Autodesk Fusion 360 to design all my stuff ;-)
Can you list the total price of this motor with the gearbox?
Without the driver how much would it cost?
Great design btw! I was very impressed.
Der Motor ist ein echter Brocken! WOW (This motor is a real hunk! WOW)
Make a brand, call it Servo-Brocken. There would be a "nomen est omen"-moment, when customers see your HUGE servos :-D
Hahaha thanks goddamnmaddog, I might do that!
very impressed
Thanks man! I’m currently working on a controller for it to control the position of the output shaft using various controlling methods like PID, 2-point,... video will be released very soon, maybe even this week so stay tuned ;-)
@@BrianBrocken keep it up! I'm doing research for a small servo I'm trying to build for a finger prosthetic(powered by those very small rc helicopter motors) so this is great inspiration
Awesome man! Good luck with your build
Thank you friend! What kind of cnc laser cut do you use?
I use a K40 50W CO2 laser cutter.
Why is the L298n linked in the description when you used a different driver in the project? Wouldn’t the L298n just go into thermal shutdown with these kinds of loads?
I used them both during the filming of this video and never experienced any problems, it might be possible when you are drawing higher currents for longer periods of time.
First of all, this is really impressive I really liked your work. Do you think that with this system I can mount it in a small go kart for my son, do you think it would need any modification?
hello Felipe, i wouldn't recommend putting this on a go kart as it wouldn't go that very fast.
Brian Brocken unless you put it the other way around B)
The 3d printer catching fire in the end freaks me out!
That’s a laser cutter, not a 3D printer and it happens quite a lot haha i need an air supply to blow away the smoke and flames. This would resolve this problem.
What software are you using for modeling de gears???
The software I'm using is Autodesk Fusion 360, which is free for students and startups that make less than 100K per year.
Wow! Which material did you use for printing? It must be very stable.
I used PLA to print this which is a commonly used 3D print plastic. It's not the strongest 3D print plastic, Nylon would be better fit for this application, but the PLA parts are more then strong enough for this servo.
@@BrianBrocken ok, thank you!
No problem ;-)
Waw, deze is ook kei goed ! Je brengt me op ideeën.... ;-)
Leuk om horen haha 😉👍
Amai chique! & haha de bloopers op het einde :P
Hahaha merci 😜👍
@@BrianBrocken Are you from Belgium?
Yes I am.
@@BrianBrocken I am too!
L'union fait la force !
Amazing....
Can u manual rotate using hand and give some force.
Hello M A sky studio, yes when the servo isn't powered you can rotate it manually by hand but when it is powered it is very hard to turn. It has a lot of torque. I'm now using a 30:1 gear ratio and the output shaft has an RPM of about 330 at 12V and 715 at 24V which is a bit too high to get it properly tuned. I'm now working on a V2 version with a 165:1 ratio which would give it even more torque and the output shaft would have a speed that's easier to tune in of about 60-120 RPM.
Good job . But what name of Drawing program
Autodesk Fusion 360
Full watching
Awesome video. But you really should get yourself a set of wrenches (two videos I've seen you using needle nose pliers on the nut). As a machinist, makes my eye twitch.. lol awesome gearbox videos though! I'm shocked the little plastic gears hold up as well as they do.
Haha I understand your frustration, I just bought a set ;-)
How would one modify it so that the motor sticks out the end of it?
So basically change orientation of motor?
Purchase where pls mentioned
What did you use for the encoder
I used a 10K potentiometer to get the position feedback.
cool!
Thanks Walter!
I dont understand the "servo" part guys how is that encoding location back?
I didn't use an encoder as possition feedback (which i should have, i know) but i used a 10K potentiometer to control the motion with my UMC I made, this can be seen at 04:55 in the video. For the pulling tests i removed the potentiometer as to not be restricted by the 180 degrees i get from it.
Hi. What fillament are you using
I used regular PLA for this one.
@@BrianBrocken cool. Thanks for replying
what was the printed part made of ? pla ? abs ?
PLA
@@BrianBrocken thanks
I'm confused where is the encoder?
Супер !
Isn't that a DC motor instead of a Servo Motor??
Hello Josh, yes you're right it uses a DC motor just like any other hobby servo. At the time of filming this video the output shaft didn't have any possition feedback on it, that's why I added the /gear reduction to the title.
OMG is that a prusa mk1 :)
It’s a clone I think, bought it back in 2015. They were really expensive at the time 😜👍
3 tonn servo
super se que tu fait
Merci beaucoup Ogier 😁
I saw 3d print doing curls.
😂 hahaha good one 😜👍
New subscriber here idol...
why not worm gears?
They are harder to design, harder to print and there's a lot more friction between the plastic components so they wear out a lot faster.
Can you tell me about price of 3d printer machine?
300 to 400 euros approximately
The name of my printers are Anet A12 and reprap prusa i3
Show 👍👈
kg ?
Same as asme 04b?????????
Same as what?
380kg lift servo motor
No it's not the same, this is my own design.
Sry with my eng
i really want to say ws simillar......
And no blame
No problem mate ;-)
How to measure the nm? What is the formula?
2kg at 6cm = 12 kg/cm so 1 kg at 6 cm = 6? //// 2 at 1 = 2?
Your first question: 1kg = 9.81 Newton (on earth). I measured the servo could lift 9kg at 6cm which equals about 55kg/cm of torque. 55kg/cm = 0.55kg/m. 0.55kg/m x 9.81 = 5.39N/m (because 1kg = 9.81 Newton).
Your second question: 2kg at 6cm is indeed 12kg/cm which is 12 kilograms per centimeter, this means you can lift 12kg at 1cm of length or lift 1kg at 12cm length. Just imagine lifting a bucket of water with a long and a short stick. Lifting the bucket with the long stick will be a lot harder then lifting that same bucket with a short stick. As the length of the lever(stick) increases, the amount of weight you can lift decreases when you use the same amount of torque and vice-versa (kg/cm, N/m).
@@BrianBrocken First: Thanks! I was looking to measure my old powerdrill Motors, but couldn't find anything.
I'm still a bit confused. 9*6=54 why 55?
Then I don’t get the part where you just multiply with the location factor to get N/m isn’t it Nm?
But maybe this is all not so important for me right now, can I say ((kg*cm/100)*9.81 = Nm
Thanks for your help!
@Marlon Jareck, I'm sorry man you're right it is 54 but I rounded it to 55 because 54 barely wasn't the stall torque yet.
You can use the formula (kg*cm/100)*9.81 = Nm.
Np, anytime ;-)
can you send me the Arduino code plz
All info including code and schematics can be found on my hackaday page. Link in the description of this video
How is it possibile that youtubers that build GARBAGE with cardboard and hot glue have millions of subs and you have just so few!
P.S. Next time would be grate if you do it whith a case looking like an actual servo!
*great
It's not servo ,just gear motor
Actually it is: th-cam.com/video/ek0E6k3FHqc/w-d-xo.html
China was use this for 100 years ago to factory so many toys
yup itu bagus...
namun tahu kah kamu jika itu terlalu memakan tempat dan besar.
yang lebih mereduksi ukuran dan sangat bertenaga adalah planetary gear box yang digunakan pada cordless bor.
seperti ini
th-cam.com/video/WHXImOYJ7yw/w-d-xo.html
saya merasa itu system gear yang sudah paling pewerfull.