3D printed high torque servo/gearbox version 2
ฝัง
- เผยแพร่เมื่อ 4 พ.ค. 2024
- This servo/gearbox is the new and improved version of my original gearbox design (video: • 3D-printed high torque... ). I also made a shredder using this gearbox (video: • 3D-printed shredder ). The original one had a gear ratio of 30:1 and the speed of the output shaft was about 715 RPM which made it difficult to tune in the right PID parameters. This new version has a gear ratio of about 162:1 which lowers the speed and increases the torque.
I choose to go for double helical gears on this one because they produce a lot less noice than regular spur gears and the forces on the teeth are transferred more gradually. The gears rotate around a 6mm stainless steel shaft which is lubricated with bearing grease. Ideally all the gears should have some bearings, this is being considered for the next moment. Unlike my previous design I used 2 20mm bearings to support the output shaft.
The servo uses a 775 36V 9000rpm brushed DC-motor which is driven by my Universal Morion Controller (UMC)(video can be found here: • Universal Motion Contr... ). The stall torque theoretically is about 297kg*cm, I was able to test the servo to a torque of about 132kg*cm. During testing none of the gears broke, they were all printed in PLA. The weak link in this design however where the mounting tabs and the bevel gears used in the first stage on the motor shaft. These 2 gears tend to slip under high loads ,like when i tried to pull the car forwards with it's handbrake on, but this didn't occur when i performed the test where it pulled 132kg*cm of torque so it should be fine to at least this torque rating.
Timestamps:
00:00 Intro
00:11 Mechanical design
00:58 3D-printing
01:08 Assembly
03:40 First runs
04:55 Radio Controlled test
05:16 Torque tests
07:28 Outro
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 thermometer: www.banggood.com/AKKU-Infrare...
PLA filament: www.banggood.com/Creality-3D-...
Components used for this project:
1 × 775 brushed motor
link: www.banggood.com/775-Gear-Mot...
1 × M3 Bolt and nut 30mm
dimension: 30mm lenght, Used to secure the small possition feedback gear to the 20mm shaft
1 × Universal Motion Controller
Another project of mine used to control and drive the servo: hackaday.io/project/170604-um...
1 × heat shrinks
www.banggood.com/328pcs-Heat-...
2 × 6mm stainless steel shafts
link: www.banggood.com/681012mm-Dia...
7 × screws 30mm lenght
dimension: 4.5mm diameter, 30mm lenght, Used to mount the lid
2 × 20mm inner diameter 6004 bearings (20*42*12mm)
link: www.banggood.com/Deep-Groove-...
2 × Screws 15mm lenght
dimension: 4.5mm diameter, 15mm lenght, Used to mount the motor
1 × 10K potentiometer
link: www.banggood.com/5pcs-200V-0_...
2 × M5 bolt and nut 40mm
dimension: 40mm lenght, Used to secure the big gear and servo arm in place
Music credit:
Wild Flower by Joakim Karud / joakimkarud
Creative Commons - Attribution-ShareAlike 3.0 Unported- CC BY-SA 3.0
Free Download / Stream: bit.ly/_wild-flower
Music promoted by Audio Library • Wild Flower - Joakim K...
Music Credit: DJ Quads
Track Name: "Www Is A Thing"
Music by: Dj Quads @ / aka-dj-quads
Official TH-cam Channel HERE: / channel
SoundCloud HERE: / aka-dj-quads
Twitter HERE: / djquads
Spotify HERE: open.spotify.com/artist/2VZrd...
Instagram HERE: / djquads - วิทยาศาสตร์และเทคโนโลยี
It appears a lot of people seem to think that the part in the video where i pull the car forwards is fake, which is understandable but not true. Pulling a car forwards on a flat floor really doesn’t require that much force, maybe 25-50kg max. Using a shaft with a radius of 1 cm equals to a torque of about (max) 50kg*cm required to pull the car forwards. The third test where i was able to reach a torque of about 132kg*cm was actually a lot harder but obviously seemed a lot easier because you’re “only” lifting 22kg at 6cm (132kg*cm) instead of pulling a big heavy car on wheels where you actually only require 50kg (max) at 1cm (50kg*cm).
You could put a digital scale between the tow hook and the rope.
Yes I might do this. I'll see if i can order one.
@@BrianBrocken it might also be nice to convert your torque numbers to Nm (weight*9.81/length in meters)
you can easily calculate the necessary force with F = m*g and F_r=F*R with R= rolling Resistance of Tire on concrete. F_necessary needs to be higher than F_r , so that the car moves. m = 1500 kg (ford focus) , g=9,81m/s² , R = 0,01 --> F_necessary > 147,15 N . With a 6 cm radius, the necessary torque is about 9 Nm (6.64 ft-lb). and that is not that much.
You should try pulling a truck out of sticky mud, with bonus points given if out of a mud *pit*! :)
the ding and check for the 22kg load test made me laugh really hard; the assembly broke, but useful data was still gathered! √
Haha indeed it was 😉👍
Looked like just the mounting lugs broke.
The mounting holes of the servo didn't break on that particular test (they did in a later test with the Ford Focus when I pulled the handbrake). The part that broke in test 3 were the straps that held the servo in place 😜👍
Brian Brocken the actual servo mechanism serviced everything though?
GOMAS
Put the motor on the last gear and watch the fist spin at the speed of light
😂
There's a functioning gear train with that many spur gears, whose last spur gear (the slowest) is fixed. Don't remember, which museum it is in.
@@JohnDoe-es5xh It’s at the MIT Museum: th-cam.com/video/VCA2whpMCno/w-d-xo.html
Haha. You'd need to supply way too much torque. Even if you could, it would just instantly break everything.
I watch a lego 1:1google gear train and....
Assuming u’d have all to torque in the universe....
Hehe first gear go BRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
Torque multiplication through a bunch of interlocking levers, positioned on a rotational axis, is a wonderful thing. Well done
I consider 98% of 3D printed objects as literally useless crap like teddy bears, pen holders, figurines, etc. then there's the 2% like yours where real things are printed to do a real job. Great work and kudos to you x 100!
Hahaha Thanks Phillip 😁👍
Unfortunately if you're watching yt vids, you're not going to see what's really going on.
Just prototyped a rear light enclosure to perfection in 1 day. Would have taken me weeks otherwise.
This is whats not getting put up online. Real engineering. 😕
Not sure which bit of the 3D printing community you’ve been observing but it’s so much more than you imply. I use my 3D printers for dozens of useful, practical projects as do all the people I know in the community. Having said that, I have made daft things - when asked - for people 😉
teddy bears aren't useless :(
While it performs a function, it still takes a lot of time to design, breaks, redesign, breaks, redesign, along with sanding, usually need to reinforce with metal axles, real bearings, and in the end, after days of work, still doesn't outperform something you could buy on Amazon very cheap and get it next day.
It's still fun, and satisfying...but can be frustrating. I spent months designing and 3d printing custom oraginzers, shelving, tool holders, etc for my work van....and one day my 4 year old daughter left the side door open and only 1 afternoon of direct sunlight ruined everything. Even though it was supposed high temperature resistance filament, everything warped enough where it either didn't work right anymore, or just looked bad enough I removed it.
It's amazing! until this moment, I could not imagine that printed products can withstand such a thing
Every 18v drill out right now has a plastic gear box
@Edgar Cordova 😕😕😕
⁰⁰⁰⁰
3d print me a 3D PRINTER. 🤔🧐💯😁😬. I guess that would be GAY. WANTING SOMETHING YOU ALREADY HAVE!
When well designed and printed, 3d printed parts are amazingly strong
People that doesn't know about 3d printing usually distrust in this manufacturing process and they materials but it's a matter of design. This type of videos make me feel the truth potential of 3D printing. Very much thanks for your work! And congrats!
😁👍
You should check this guy out: th-cam.com/channels/e1Aj6VEO299Yq4WkXdoD3Q.html
I really like the camera stand he makes with a bunch of printed parts.
And they're right
PLA will delaminate at some point after a few hours of work.
It's ok for a proof of concept, but the last gears will suffer first.
3D Printing is great for proof of concept, then moves to real manufacturing by using stronger materials.
Great work Brian. This was certainly a lot of work. I appreciate your detail. Thanks.
So well done! Both the design and the video. Inspiring!
Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.
No bro you can't were are you going to place your fulcrum
_Arquimedes._
The guy who said that didn't know about material strength
@@the_greystudios on the moon, he also asked for a lever long enough...
@@GeomancerHT yeah lol😂😂
Amazing!!! Thanks for this channel that I can see practical engineering done..
Give this man a metal printer.
Yes please 😁
Hey, would these still work ok if you make a sand mold of em to pour aluminum in an at least have a high detailed shape of em in aluminum. But to try an help out see if it could help out slowing down the wear an tear of em by nickel plating the gears
it's called metal casting
@@Gremlinke96 theres also 3d metal printing now
@@squishy_Rio but it’s very very very expensive, unless if you using metal fill filament
Very impressive torque. I can't believe that's printed in plain PLA! Great job Brian!
Thanks man 👍
@@BrianBrocken Next version, LIFT a Ford Taurus! lol I was kidding but... I wonder how many snatch blocks you would need to lift a car with your motor?!
th-cam.com/video/M2w3NZzPwOM/w-d-xo.html
Herringbone gears are the master race.
Mind blowing! Incredible Work! :)
So inspirational. Thanks a ton for sharing! :)
Impressive job, bravoo!
Lovee It, keep up this quality content. Loved every aspect of the video!!
Thanks man, much appreciated 😁
Brian Brocken 👍
Good job. Good choice on the shape of the gears, they make less noise and are more powerful.
Two of these Could fit into a small tracked vehicle, printed with ABS in this case.
Him lubricating the gearbox while its on scarred me for a second
Congratulations, very good project
For anyone else confused by the 'kg/cm' torque measurements:
I *think* I'm convinced I converted it correctly to both SAE and SI units I think are more familiar:
That's about 13 N*m, or 17 Lbf*ft, which isn't _insane_ considering the 80+ pounds most cars' lug nuts are torqued to. Just means you need a longer lever, though. Or a bigger gear reduction, though :)
Wooow it is incredible that how this small motor can pull a car💜👌
Now this is the guy we want who actually puts lube inside the gearbox
That was great . Good job sir
I learned how to measure torque by watching the video thank you ^^
I hope you didn't confuse the units like the author did lol, it's force*distance, not force/distance
You tube needs a love button. I would be giving it a smash for your work. Great stuff 😃
haha that would be great ;-) thanks man
Very good design, well done !
Never seen double helical gear in use...It would be real challenge to build one by conventional methods...Thanks for nice video!
When you realize he has a belgian plate:
Wtf im watching someone who lives in my country, and he is big brain.
Much better with the sound turned off.
Kudo on this print and build.
Nah it was much better with the sound turned on
Wow! Incredible! Very NICE job!
Excellent work
Hi Brian, That is a terrific work. It always amazes me to see what a pair of gears can do.
This is great, we need more functional (and ideally parametric) 3D prints! Who cares about vases?
Just a little critic: torque is measured in force TIMES length. e.g. 13kg at 6cm corresponds to 13kg * 9,81 N/kg * 6cm = 765 Ncm, at least here on earth.
i think those small servo's u can buy are rated by kg at 1cm from the pivot point and that is why he puts it like this
@@wardwyseur his point was that you're supposed to multiply, in the video he divides, the units used are fine
@@phunmaster2000 Kinda. The use of kg for force is illustrative but not strictly admissible.
@@phunmaster2000 kg/cm doesn't mean anything in physics
@Yosyp. Not sure that’s strictly true. You could legitimately state the mass of say an unstressed wire rope in kg/cm.
Nice gear system
You have a good talente
Awesome work man
Did you check the temperature while the Focus was being towed? That would be interesting to see!
Great idea, and good work!🤟👍
Love the heatshrink color easter egg :)
Funny enough this wasn't done on purpose haha
I love the sound of it
Wow, nice work gratulation , you are a real engineer
Wow I need to learn some stuff from this.
Finally someone using 3d printing for something useful instead of shitty knick knacks
I do have to point out it doesnt really take much force to move a car on a flat surface especially concrete. Probablly only takes like 15 to 20 pounds to pull or push
Hahaha this is actually true. Test number 3 with the 22 kg weight was actually a lot harder than the ford but it looks way cooler 😎, I did try to pull the car forward with its handbrake on, but then the bevel gears in the first stage started to slip and one of the tabs broke off, I might give this another try in the future.
Great project, just spent a while scouring your links before I found the dimensions of the 20mm shaft you forgot to mention in the supplies lists 😉 you might want to add it as a part on the parts list.
Une très bonne maitrise de fusion 360 !
Ce boitier d'essai est une vraie réussite !
Bravo pour ce projet !
A very good mastery of 360 fusion !
This test box is a real success !
Well done for this project !
Merci beaucoup Georges!
Yeah, gears are fun. Since you have mentioned the word "servo" the thing that I would like to see tested the most is the backlash. Wear over time and under load would be even more informative.
TEST 4: FORD FOCUS XD I LOVE IT!
*Don't underestimate the power of mechanical advantage!!!*
Winding a rope on an axle as a winch multiplies the torque enormously, the narrower the axle. You could probably pull the car with a single 10:1 reduction stage and some 2mm dyneema rope on a 6mm shaft, for example.
5:49 do you even lift, bro!?
I don't get it
Put the car in park and tow the forklift!
@@shoresy6927 r/ woosh I guess
Yes it lift that thing if you r asking
Do you use Byju's data handling survey dialogue
I like this video until we saw the scale of the servo, then I was seriously impressed, cudos to you.
Unexpected test at the end 😂👍👏
Very cool love it. Will be Great for robotics
5:16 Unit of torque is in this case kg*cm instead of kg/cm!
Anyway, very impressive
i searched for that comment😅
Lukas Seirlehner Me too!
Yeah, I was confused with the units at first
Small remark, but not unimportant. Torque is, as you know, the product of a force and a distance. The units should be multiplied as well: kg x cm, not kg/cm. Really awesome project, and good editing!
Ok thank you Dirk ;-)
So a part is badly edited, ?? and the test results are not bad ???
i mean yes but also no lol, its the cross product of a force vector and a distance vector. kg is a unit of mass. the force in this case is the gravitational force acting on the mass. 1 newton is 1 (kg⋅m)/s^2. surface gravity here about 9.81m/s^2. the most typical torque unit being the newton⋅meter (N⋅m) so for the final 22kg test we get a peak torque of just shy of 13 N⋅m when the servo arm is parallel to the horizon. this is quite a good result.
however the mistake is more understandable here because for some truly unknowable reason the actual manufacturers of hobby grade servos such as Spektrum (the maker of his remote) routinely incorrectly use kg⋅cm instead of either N⋅m or mN⋅m (milli newton meter). This likely stems from the fact that on many of these companies rate their product using the imperial system and then simply post a metric conversion and some dumb technical writer got confused. this is because while we think of pounds and kilograms as being imperial and metric counterparts they are actually entirely different properties. pounds are not a measure of mass but are treated as such in some contexts even though weight is a force and so pounds are a force unit. this is why the imperial standard torque unit is the foot⋅pound (ft⋅lb) so someone at the company with limited understanding just converted feet to meters and pounds to kilograms and called it a day.
TL:DR excellent servo and excellent video and someone at spektrum needs a talking to thanks for sharing your work with us
Wow it's amazing bro
Awesome bro nice work
1:54 I really LOVE your reference to your national tricolor :)
Сделано великолепно, однозначно лайк.
Всё это конечно круто, но пластиковые шестерни как то не серьёзно, только для игрушек годится. У ФОРДА изначально накат хороший, ещё и колёса подкачали чтоб наверняка вот он и поехал, там усилие то относительно небольшое требуется чтоб его сдвинуть по ровненькой поверхности. Редуктор на 3D принтере это конечно весьма впечатляет, но постоянно его лучше так не нагружать, зубья срежет.
beautiful!
Amazing video
Acting as a electrical winding rope hook and install it at the bumper of 4x4 truck。Save much money.
ray-char c bad idea xd
It's a different story when you're pulling your 4x4 uphill with a winch hooked to a tree 😂
Good joke))
I have an interesting question, do you think it’s possible to design a 3D printed version of a gearbox for bicycle? Like the pinion gearbox, those things are massively expensive and if they could be home 3d printed that would be so amazing…
yes
Nice work
Masterfully engineered and built.
Chevron, André Citroen Style!
6:04 surprised
Wow. It's amazing!
That's no servo thats a KILLER
Really powerful gearbox. Did you calculate the reduction ratio? I wondered how much. And i surprised how did the gears or torque arm brake? Btw awesome design and project!
Thanks Retsetman, yes i did, it has a ratio of about 162:1 and would theoretically have a torque of about 297 kg/cm. And non of the gears broke during testing, the only part that broke were the mounting tabs 😜
The unit of torque is Kgcm or Newton-Meter. Kg/cm is not unit of anything. Sorry for nitpicking 👍🏿
@@RajeshPachaikani Sure it is Not the correct unit but it is mostly used for servos in Radio Controller Cars or plane.
@@RajeshPachaikani it's not the SI unit torque. Torque can have any unit consisting a unit of force multiplied by a unit of length - users convenience determines which one he wants !
@@BrianBrocken Did you take into account the motor's gearbox as well?
I have an experiment if like to conduct that I'd happily share with you. Would you be willing to send the files and parts list to make that contraption to me?
Sure man, all the info and part lists can be found on my hackaday page: hackaday.io/project/173854-3d-printed-high-torque-servogearbox-version-2
The STL-files are free and can be found here: www.thingiverse.com/thing:4547703
The Fusion 360 source files can be found here: www.cgtrader.com/3d-print-models/hobby-diy/robotics/3d-printable-high-torque-servo-gearbox-version-2
All the links above can also be found on my hackaday page.
Gears literally are just spinning levers afterall
Servo quá khoẻ luôn , cách làm rất chính xác và chuyên nghiệp, servo khoẻ này rất cần cho mô hình điều khiển từ xa có trọng tải điều khiển lớn
Very impressive
Great video!
I see you're using PWM for the motor, maybe change the PWM frequency to something like 30-40kHz so that it's outside the audible range? It can get a bit annoying
Yes some people have also recommended this to me, I’ll have a look into it.
next project: Car lifter ;)
very good work
I wish all the gears in my RC Cars were designed like this! 🤯
This is why you don't need torque when you have hp and hearing.
Servos on small rc trainer: 9g servo.
Servos on a full size rc airbus a380:
Very good. Fantastic.
This planet could change it's orbital tilt with just half a dozen of these connected from one pole to the equator, over a period of roughly thirty billion years. Amazing!
We did something like that on Bixzemdis's second moon Prqfwzim over roughly the same period, and Prqfwzim is roughly the same size as earth.
You should try it with the car in gear and see what happens.
A child can push the car on neutral if it is on a horisontal smooth pave.
But children can't be 3d printed.
@@tyramid How would you describe their construction process, then? It's as close to 3D printing as anything else, I'd say!
@@xymist5605 They are FDM indeed
Xymist mitosis
ohh thats good.....
Excellent
Fun fact. These arrow shaped gears dents where first used by Citroen, after buying the license in Poland.
After the commercial success of these new gears, the company adopted the arrows as their logo.
The more you know
What really? Thats nice to know thanks for sharing mate 😉👍
Bizar hoe sterk dat plastic is.
What um English
@@rollercoasterkid1237 what is he saying
Also
Hi coaster enthusiast
He says: Crazy how strong plastic can be.
@@BrianBrocken ok
@@BrianBrocken Sorry, next time I will comment in english.
Waw, unbelievable ! Awesome video, great ingenuity, but.... why that stupid music in the background. Defenately you could do better with background music !
Hello phillip, I’m trying but it’s hard to find some good non copyrighted music and also not everyone has the same taste in music
#mute
Music was ok, it had an ironic undertone, since it contrasted to the video-content.
@@BrianBrocken That's why I prefer no music in a video like this. It can usually only detract, it seldom enhances.
@@BrianBrocken Je bent dus van België/Vous-êtes de la Belgique. Nl of Fr ?
Very good machine.
Yo deserve your blue finger never been so proud to give it to somebody
Congrats for ur video
Gears are like an unparched glitch.
311 dislike?!?!? Why???
Some people are convinced this is fake (which I really have to take as a compliment actually), some people don’t like the music, some people prefer videos with a voice over, etc...
@@BrianBrocken I uploaded this video, but sometimes I downvote just because I don't want similar content to be recommended to me. Not that videos are bad, but I don't watch make up videos and if one auto-plays, I just downvote and move to next one
good job
Awesome Brian...
Thanks so much 👍
Reminded me of the great Archimedes!!!
"Give me a place on which to stand, and I will move the earth!!!"👌👌👌
Can u tell us which printer, version and filaments were used ??
This reminds me why I bought that printer. To make real things.
This music is giving me cancer
Keep your opinion to yourself
@@danek_hren That is a statement, not an opinion. I stated that the music was giving me cancer.
Amazing!
Great work mate. Subbed 😁
Thanks Jim 😁
Amazing
Worth mentioning those are usually called herringbone gears in the 3d printing community. Some early extruders used that type.
You’re right but both terms are correct and can be used, it actually doesn’t matter that much. www.sciencedirect.com/topics/engineering/double-helical-gear
brilliant
amazing