120Nm 3D Printed Cycloidal Drive

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  • เผยแพร่เมื่อ 24 ธ.ค. 2024

ความคิดเห็น • 351

  • @FaffyWaffles
    @FaffyWaffles 10 หลายเดือนก่อน +246

    Open Dog is one of the coolest projects on the internet

    • @Alessandro---
      @Alessandro--- 10 หลายเดือนก่อน +15

      James Bruton IS possibly the coolest creator on the Net.

    • @NealFosterHD
      @NealFosterHD 10 หลายเดือนก่อน +1

      Has anyone else made one from his designs?

  • @wktodd
    @wktodd 10 หลายเดือนก่อน +144

    You might have room in the hub for a third disc to give three phase drive . That should prevent the cyclic load that you're hearing. You might have to split the cam to get the bearings on.

  • @Fabian3331234333
    @Fabian3331234333 10 หลายเดือนก่อน +51

    The belt is actually quiet genius, as it's limiting the torque and prevents the gearbox from exploding

    • @GaryTheRCcar
      @GaryTheRCcar 10 หลายเดือนก่อน +2

      I think it's better for the motor to just stall, the belt will wear out real quick shipping like that.

    • @ashtonhoward5582
      @ashtonhoward5582 10 หลายเดือนก่อน +9

      ​@@GaryTheRCcar but the belt is cheaper.

    • @Unmannedair
      @Unmannedair 10 หลายเดือนก่อน +18

      Belts are basically mechanical fuses

    • @conorstewart2214
      @conorstewart2214 10 หลายเดือนก่อน +3

      @@ashtonhoward5582 Just current limit the motor, you can limit the torque then too. A motor stalling isn't necessarily bad, its what happens after it stalls that is the problem, like continuing to run current through it and at that point it is just a resistor.

    • @GaryTheRCcar
      @GaryTheRCcar 10 หลายเดือนก่อน

      Just because the motor stalls doesn't mean it will break. as long as it doesn't overheat it will be fine. He can limit either the voltage or current to achive this@@ashtonhoward5582

  • @BlizzyFox
    @BlizzyFox 10 หลายเดือนก่อน +64

    My favorite part of these videos is when James puts his hands in places where the 3d prints can crush him

    • @MattDunlapCO
      @MattDunlapCO 10 หลายเดือนก่อน +16

      Holy crap. I was whole-body cringing and holding my breath when he was trying to stop the drive with his hands.

    • @AJ-Palermo
      @AJ-Palermo 10 หลายเดือนก่อน +14

      I was thinking the same thing! With the 20:1 gearbox that's over 4500kg/cm!! A finger probably wouldn't even slow the motor down! It'd be a slight increase in current draw and a significant decrease in fingers!

    • @MattDunlapCO
      @MattDunlapCO 10 หลายเดือนก่อน +4

      @jamesbruton, please do a follow up where you feed meats and various other objects into the gears or between the belt and idlers! Another demonstration showing how much more dangerous these machines are when wearing gloves would also be fun.

    • @AJ-Palermo
      @AJ-Palermo 10 หลายเดือนก่อน +5

      @@MattDunlapCO that's a cool idea! I know firsthand (pun intended) how dangerous gloves are around machines with rotating parts. I work in a warehouse with conveyor belts, I'd never stick my hand in anything, but I was curious and stuck just my glove between the rollers, and even though the rollers lift up so they don't crush your fingers, there was still an impressive pulling force on the glove. If you were to stick your finger in there, it would definitely hurt, but you wouldn't lose it. With a glove on, especially a grippy one, you could easily lose your fingers or hand, maybe even your arm!

    • @MattDunlapCO
      @MattDunlapCO 10 หลายเดือนก่อน +3

      @@AJ-Palermo my daughter may have lost fingers to a drill press if she'd had on gloves tougher than cheap cotton knit. Thankfully the material failed before her hand.

  • @noahwomack9929
    @noahwomack9929 10 หลายเดือนก่อน +76

    Great video as always James! For once I might be able to help you out with a design. I've been working with a university rover team to design and build cycloidal reduction drives for use in our 5 axis rover arm. The idea you tried at the beginning of the video is actually what we're currently using, with the output of the gearbox being the housing of the cycloidal itself. If you'd like to take a look at our cad or ask any questions about it's performance I'd love to have a chat with you about the subject.

    • @kimtae858
      @kimtae858 10 หลายเดือนก่อน +10

      He doesn't read comments after the first few hours of a video going live. Twitter or Instagram are better places to get his attention, but be succinct about it. He doesn't read long messages, lol.

    • @Hawk7886
      @Hawk7886 10 หลายเดือนก่อน +6

      ​@@kimtae858pretty sad really, the comments are great in videos like this

  • @davidcatanach2620
    @davidcatanach2620 10 หลายเดือนก่อน +130

    Feel like he’s just phoning it in

    • @WarwickAllison
      @WarwickAllison 10 หลายเดือนก่อน +9

      His joke is getting very old. But he'll keep doing it to generate all this pointless "engagement" as his channel goes down the toilet with all the other meme-chasers.

    • @WolfmanDude
      @WolfmanDude 10 หลายเดือนก่อน +24

      @@WarwickAllison Why are you so mad about a minor visual joke in the intro? Not even normal mad, your comment reads like you are about to strangle someone :D

    • @ionbg7
      @ionbg7 10 หลายเดือนก่อน +5

      @@WarwickAllison It's his microphone

    • @FrodeAltink
      @FrodeAltink 10 หลายเดือนก่อน +2

      No, it is not his microphone! His microphone is on the neck of his t-shirt. The phone is just a prop. And I am loosing my focus half way through the video because of that stupid phone. Please, just stop using it.

    • @WarwickAllison
      @WarwickAllison 10 หลายเดือนก่อน +1

      @@WolfmanDude Bored of it rather than "mad". Every TH-camr doing the same joke gets boring fast. I actually like that he's doubled-down - helps the meme run its course quicker.

  • @ManlyJack
    @ManlyJack 10 หลายเดือนก่อน +10

    What's with all the recent videos being phoned in?

    • @SCU3A_S7EVE
      @SCU3A_S7EVE 10 หลายเดือนก่อน

      @@MaariSuave- r/woooosh

    • @UptownBoogieDown
      @UptownBoogieDown 10 หลายเดือนก่อน

      Boom boom tsck

  • @excitedbox5705
    @excitedbox5705 10 หลายเดือนก่อน +23

    To put the motor inside the gearbox you need to "cup" the motor with mounting points around the lip of the cup and the shaft through a hole in the bottom of the cup. Then you can put the bearings for the cam shaft around the cup. Or look for a motor with mounting points in the base. The size of this drive makes it kinda impractical, but it did lift 2 tons at 1 cm. Maybe going with 100% infill you can shrink the size a bit.

    • @erictheepic5019
      @erictheepic5019 10 หลายเดือนก่อน

      >Or look for a motor with mounting points in the base.
      Or he could *make* mounting points. I'm thinking either a battery spot welder or a (reversible) adhesive.

  • @Xailow
    @Xailow 10 หลายเดือนก่อน +16

    Giant open dog/AT-AT? Brilliant design!

  • @HelenaOfDetroit
    @HelenaOfDetroit 10 หลายเดือนก่อน +5

    Having been watching you for almost a decade it makes me smile to see you learning and using mechanical principles. You've always been an amazingly talented electrical engineer with computer programming and maths skills beyond my abilities, but as I'm more inclined towards mechanical engineering then some of the earlier designs were sometimes difficult to watch. Nowadays though? Nothing but smiles! You've grown so much and you're getting so good at mixing the two specialties together to design and make incredible objects. Keep up the amazing work James! Thank you for sharing so much of your hard work, progression, information, knowledge, and passion.

    • @jamesbruton
      @jamesbruton  10 หลายเดือนก่อน +2

      lovely thanks!

  • @tHaH4x0r
    @tHaH4x0r 10 หลายเดือนก่อน +6

    For your first design, the problem with your wobbeling is indeed with the motor itself, but not necessarily with gripping it. Essentially you have an overconstrained problem here. On one hand, the discs (through the frame and bearings) want to determine the center of rotation, and on the other, the motor wants to fix it as well. So what you would want to do, is release certain degrees of freedom keeping the motor in place, and only constraining the DOFs that you need.
    In this case, you would want to constrain rotation around the motor axis (otherwise the housing would turn as well), as well as translation along that same axis. You probably want to somewhat release the other two rotational degrees of freedom, although they are of lesser importance here. What is most important, is that you release the two translational degrees of freedom. That would allow the motor to 'self allign', and to 'track' the center of rotation. This would prevent the thing from wobbeling loose due to excessive forces, and likely also fix that flexing issue of the outer case.
    That second design, the belt essentially fixes this overconstrained issue. It is pretty compliant in those translational DOFs (and rotation as well).

  • @pruthvimeka3259
    @pruthvimeka3259 6 หลายเดือนก่อน +1

    to stop the wobble and the mis alignment once in motion, you can screw the 2 cycloidal gear parts together while maintaining the offset. that restricts the wobble while achieving motion that the cycloidal gear system is supposed to achieve.

  • @lukedoesnotlie
    @lukedoesnotlie 10 หลายเดือนก่อน +6

    The first cam which incorporated the motor was beautiful.

  • @aserta
    @aserta 10 หลายเดือนก่อน +6

    You can still have it in the center, just go to a larger bearing and make a casement that brings mounting points to the back of the gearbox (of the motor).

    • @TheGeniusSavant1
      @TheGeniusSavant1 10 หลายเดือนก่อน +2

      That's exactly what I was thinking. At 3:48, it looks like it would be no problem to extend the sleeve and add mounting points at the back of the motor near the leads.

    • @leptok3736
      @leptok3736 10 หลายเดือนก่อน

      ​@@TheGeniusSavant1third along the lines of: Was thinking, could he increase the diameter of the collar he puts around the motor to run some tubes along the motor back to a solid foundation? Then everything else is the same just with the center diameter enlarged to accommodate it?

  • @ethrilswifthawk3769
    @ethrilswifthawk3769 8 หลายเดือนก่อน +1

    i think in the first version one of the inner cams was a tooth off or something causing the output bolts to press them further out then the diameter of the housing, thus the flex

  • @Wizarth
    @Wizarth 10 หลายเดือนก่อน +1

    I think a simple thing that would make these projects easier is a big switch for turning on & reversing the battery power. You could even make it comically large, so you can throw it forward/reverse with lots of visibility on the camera.

  • @technologyhobby
    @technologyhobby 10 หลายเดือนก่อน +1

    I recently rebuilt a 4 tonne excavators final drive which is a very similar design to yours, but with a planetary gear set at the end, and three cam shafts spread out around the cycloid gears rather than a central cam to create that walking motion. The strength and reliability of these cycloid gear designs is incredible!

  • @vell0cet517
    @vell0cet517 10 หลายเดือนก่อน +2

    3d printed cycloidal drives always get me excited. I think they're going to play a major role in affordable robotics. One thing I will say about your design is that large bearings are expensive and heavy. I also get that sometimes you have no choice. Great video and I'm looking forward to what you're working on next.

  • @mrwoodandmrtin
    @mrwoodandmrtin 10 หลายเดือนก่อน +187

    Brother, you are getting pretty blase' about putting your hands around highly geared moving parts. You really need to check yourself. This stuff is now getting finger mangling strong. You need new safety protocols.

    • @Hawk7886
      @Hawk7886 10 หลายเดือนก่อน +8

      Yeah those pinch points would blow up fingers like hot dogs hit with a hammer

    • @The12gaged
      @The12gaged 10 หลายเดือนก่อน +9

      Ya. Ngl, even though I knew this was posted and nothing likely happened, I clenched when I saw that. It not being bolted down, with the self collision issue, while all the sketchy finger work was going on was a recipe if i ever saw one. Glad it went like it did.

    • @BouncingBallGames
      @BouncingBallGames 10 หลายเดือนก่อน

      Ooof that was painful to watch.

    • @Fanny-Fanny
      @Fanny-Fanny 10 หลายเดือนก่อน

      I disagree. I think it made it more exciting

    • @mrwoodandmrtin
      @mrwoodandmrtin 10 หลายเดือนก่อน +2

      Good point.. It's just a bad ROI in my honest opinion. Entertaining you briefly in exchange for the premiant loss of a very useful fingertip. @@Fanny-Fanny

  • @BloodyMobile
    @BloodyMobile 10 หลายเดือนก่อน +2

    I'm genuinely impressed it managed to do 200 NM for a moment and the only thing that "broke" was the belt no longer being tight enough.

  • @111elf1
    @111elf1 10 หลายเดือนก่อน +4

    is it possible that on version 1 one of the excentric 21gears was rotated 60° and thus the excenters are out of sync? (this sentence makes sense in my mind)

    • @furmek
      @furmek 10 หลายเดือนก่อน +2

      seems like it!
      The internal 20 lobed - 6 holed parts have only one axis (plane?) os symmetry. If you rotate them by 60 degrees of what the supposed to be you will start pushing outer "race" out of shape.

  • @davidhannan2672
    @davidhannan2672 10 หลายเดือนก่อน +10

    A fun thing you might try with the phone is to swap the earpiece and microphone leads in the jack, and then speak into earpiece. It will sound more like what you would expect a phone to sound like. Its not the microphone that gives old phones that characteristic tone, its the speaker

    • @killingtimeitself
      @killingtimeitself 10 หลายเดือนก่อน +3

      its also the phone network, as well.

  • @DanJanTube
    @DanJanTube 10 หลายเดือนก่อน +1

    mind your wall thickness when you're designing those 3d parts. and use a inside radius whenever possible, carries the strain better than a sharp corner

  • @jeremyniemiec9252
    @jeremyniemiec9252 10 หลายเดือนก่อน +1

    hello, you helped to inspire my senior design project in which I developed a 13:1 cycloidal. To reduce weight SLA printed bushings where used and they worked great!

  • @Gregulations
    @Gregulations 9 หลายเดือนก่อน

    Wow this may well come in use for one of my next projects! Thanks!

  • @jac2206
    @jac2206 10 หลายเดือนก่อน +2

    So Impressive, for a 3D printed cycloidal. Everyone who still thinks 3D printing Is useless, should Watch a James Bruton video

  • @faeranne
    @faeranne 10 หลายเดือนก่อน +5

    A very nice build that's well explained, but I gotta ask... wasn't the intent to keep the motor inside the hub? I feel like about half-way through the video, the goal was kinda lost there. Might be worth re-tackling the original concept again, cause I'd still love to see a successful through-motor build.

  • @Psyconinja1532
    @Psyconinja1532 10 หลายเดือนก่อน +1

    So are we safe to assume that the "much bigger project" is gonna be a ride-able open-dog?

  • @_DML_
    @_DML_ 7 หลายเดือนก่อน

    I love how everyone uses the time-tested "can't stop that with my hands" method to show that something is awesome and will be useful.

  • @Eddesignful
    @Eddesignful 10 หลายเดือนก่อน +1

    That is a monster drive. Keen to see the project that needs it.

  • @odinata
    @odinata 10 หลายเดือนก่อน +5

    What's with the old timey phone?

  • @eski5195
    @eski5195 10 หลายเดือนก่อน +1

    For 3d printing your big parts, i'd suggest a 3d infill like cubic or gyroid. It doesnt add much time and make parts somewhat isotropic and more tough

  • @patrickjdarrow
    @patrickjdarrow 10 หลายเดือนก่อน

    Really love this kind of video that focuses on practical and fundamental elements James!

  • @rikschaaf
    @rikschaaf 10 หลายเดือนก่อน +3

    Increasing the belt reduction (if only a little bit) would also make the belt more tight.

  • @TradeWorks_Construction
    @TradeWorks_Construction 10 หลายเดือนก่อน

    I liked the circumferential bearing solution, using multiple smaller bearing held into a grove rather than using a single massive bearing or bushing. I’ll remember that trick going forward.

  • @lucasrogers8021
    @lucasrogers8021 10 หลายเดือนก่อน +5

    I'm building one of the Open-dogs right now.

  • @nevernether3368
    @nevernether3368 10 หลายเดือนก่อน +3

    "Assign a point of failure or it will assign one for you" -engineer somewhere

  • @RiderRickMaker
    @RiderRickMaker 10 หลายเดือนก่อน

    Made my first cycloidal about 3 years ago... milled and 3d printed with servos... that thing was savage. But..... metal is metal! :) Excelent project tough!

  • @RinksRides
    @RinksRides 10 หลายเดือนก่อน +1

    120Nm?! From Plastic bits?! Are U MAD?! Cool gearbox, like the smaller bearings round the perimeter, I might S.T.E.A.L. that part of the gearbox in my own design. Not sure if that's more eco or just machining 5mm ball grooves between inside and outside housings.

  • @ProximitySound
    @ProximitySound 10 หลายเดือนก่อน +3

    Love your content, but please ditch the phone if you're not going to actually use the audio from it. That or process/mix your audio to sound like it's actually coming from the phone.

  • @t1000android
    @t1000android 6 หลายเดือนก่อน

    I love the way you say "BEARING"

  • @sydnerd
    @sydnerd 10 หลายเดือนก่อน +5

    I really love that something as simple as the belt tension can be utilized as the max lift safety-limiter to avoid breakage of other parts that would break otherwise.
    Go Open Dog!

  • @mastasolo
    @mastasolo 10 หลายเดือนก่อน +1

    How often do 3D printed parts get scrapped with your projects? if it's a lot, I think a fun project would be to try and reclaim some of it and make your own filament spools.

  • @CollectiveSoftware
    @CollectiveSoftware 10 หลายเดือนก่อน

    I love that solution for making an effective huge bearing out of plastic and small bearings

  • @Advil1024
    @Advil1024 10 หลายเดือนก่อน

    The most powerful 3D printed servo on the planet. Time to make BIG robots.

  • @Acamperfull
    @Acamperfull 10 หลายเดือนก่อน +1

    Could you reduce the wobbling if you had three discs where disc 1 and 3 are in sync (same cam angle) with half the with of the middle disc which is running on cam opposite to the other cams. I think the cams wobble forces on the ring could balance each other this way?
    Very nice solution with the poor mans big bearing btw!

  • @Z0M8I3D
    @Z0M8I3D 10 หลายเดือนก่อน +1

    That poor-man's big-bearing seems like a good solution for the flexing. Too bad the back end of the motor isn't keyed for a better inlayed holder for that center drive idea to work but with the second version (including thinner profile & the guide bearings [poor-man's big bearing]).

  • @nekobyoneko444
    @nekobyoneko444 10 หลายเดือนก่อน

    I'm curious if this could be a feasible option for something like a (relatively) slim high load elbow joint for a mechanical arm alternative to hydraulics. Seems like if it was made of sturdier material then it could move a heck of a lot for such a small setup. Either way looking forward to see what you do with it in the future.

  • @quacker8230
    @quacker8230 10 หลายเดือนก่อน +1

    hey james, i noticed how cleanly some of your parts fitted together and I was wondering what offset you would use for say fitting a circle within another circle? thanks tyson:)

  • @corwin.macleod
    @corwin.macleod 10 หลายเดือนก่อน +1

    So you have an rv gearbox, a planetary gearbox already mounted on a motor and a belt transmittion on top of it. I think there is some room for optimisation here.

  • @DariusAlexanderMusic
    @DariusAlexanderMusic 10 หลายเดือนก่อน +1

    (maybe bad) idea for improving belt skipping;- can you have the belt go around the pulley entirely? if you imagine that normally the belt is in contact with around half of the pulley, instead could you have a pulley that guides the belt to wrap around 1.5 times. Obviously, you'd need a corkscrew-shaped pulley so the belt doesn't clip through itself, and a belt that can flex that much.

    • @dekutree64
      @dekutree64 10 หลายเดือนก่อน +1

      Corkscrew pulley would cause the belt to travel sideways as it turns, so it would have limited range of motion similar to capstan drive.

    • @DariusAlexanderMusic
      @DariusAlexanderMusic 10 หลายเดือนก่อน

      @@dekutree64 excellent point, didn’t consider that.

  • @ed.puckett
    @ed.puckett 10 หลายเดือนก่อน

    I first found your channel during the "Iron Man" period, and you never stop impressing me with what you are able to accomplish!

  • @steffen1182
    @steffen1182 10 หลายเดือนก่อน +8

    wats up with this red phone? I dont get it! 🤔

    • @AnonymousAnarchist2
      @AnonymousAnarchist2 10 หลายเดือนก่อน

      Cant say why hes using a microphone inside a bright red phone, however I can say bright red phones have an association with important direct lines for a kind of neato oddball humor.. ish. I fail to find the humor myself but he seems to be enjoying it so.. meh.

  • @andrewslater6846
    @andrewslater6846 10 หลายเดือนก่อน

    If you have a method of measuring the concentricity of the motor housing to the shaft, you might be able to find why it was warping the outer ring. I think if you could constrain the cam shaft radially and just have a torque arm to prevent the motor from rotating, you would eliminate some tolerance stack up. But a torque arm would only work well if the motor was securely attached to the cam shaft (taper shaft or bushing) more than just a key and screw. Which isn’t really common for a 10mm shaft.
    But basically you reduced the number of axis you need to have tight concentric alignment by having a belt drive.

  • @TheMeditron
    @TheMeditron 10 หลายเดือนก่อน +1

    Wow, that drive is so impressive! I keep thinking it would be sweet to see you build a scale version of an AT-ST, that drive might work in the joints?

  • @crystaldragon141
    @crystaldragon141 10 หลายเดือนก่อน

    you could probably put the belt side in double shear with one more plate. It would be nice if the motor had a longer shaft so that could be supported as well.

  • @sharkyshark1
    @sharkyshark1 10 หลายเดือนก่อน

    You could always brace the motor mount to stop that flexing to allow you to take it higher before it flexes again.

  • @emertonom
    @emertonom 10 หลายเดือนก่อน

    Something weird happens when you show the cad model on screen at about 8:50. In the 1080p version of the video, there's a weird green discoloration right near the center of the screen. It was distracting enough that I got up to clean my TV screen, but it wouldn't come off; then I thought to check it on my phone, and it wasn't there, but then I thought "it's probably not using the same resolution," and when I changed it to 1080p, sure enough, the discolored spot reappeared. Maybe something from your capture software?

  • @Pillazo
    @Pillazo 10 หลายเดือนก่อน

    I'd be very interested to know how you design the belt sprockets! I have belts but no idea how to design the sprockets for them to run on.

  • @Maltese82790
    @Maltese82790 10 หลายเดือนก่อน

    I know so little about any of this, but I look forward to one day seeing you post a video about how you have made your very own Mech Suit.

  • @CrudelyMade
    @CrudelyMade 10 หลายเดือนก่อน

    if you put a support bar between the motor on the shaft side and the center of the gear, it should keep the plastic from bending and moving the motor toward the gear, keeping the belt as tight as it is initially. it's really jsut a space that you might be able to put on/off, I don't think it'd have to be super duper sturdy to work, with the way it'd be arranged.

  • @preferredimage
    @preferredimage 10 หลายเดือนก่อน +4

    Really committed to that phone gag..... :)

    • @filemorf
      @filemorf 10 หลายเดือนก่อน

      More like :( getting old fast, find it distracting, I will be skipping ahead here and there to reduce my view time. Too bad I usually enjoy and look forward to his content. Hopefully just a quick fad of a meme and over with it soon. I don't want to keep talking about it either due to the Striesand effect.

    • @GooopGoooop
      @GooopGoooop 10 หลายเดือนก่อน +1

      @@filemorf imagine being this emotional over an insignificant prop

  • @cyberstar251
    @cyberstar251 10 หลายเดือนก่อน +2

    why are you using a phone for the microphone?

    • @bobskingle5762
      @bobskingle5762 10 หลายเดือนก่อน

      He isn't. His mic is clipped to his t-shirt neckline.

  • @muttons8802
    @muttons8802 10 หลายเดือนก่อน

    I wonder how long before the telephone mic has a machine vision controlled arm. To enhance the hands free experience

  • @matthewrennie1110
    @matthewrennie1110 10 หลายเดือนก่อน +3

    Bro I swear you have the bast ratio of skill, dedication and talent. Doing a couple of my own projects right now but definitely planning on making an open dog at some point. Keep it up man love your videos

    • @AJ-Palermo
      @AJ-Palermo 10 หลายเดือนก่อน

      And creativity! He comes up with really intriguing ideas!

  • @QIKUGAMES-QIKU
    @QIKUGAMES-QIKU 10 หลายเดือนก่อน +6

    You seem to be still stuck on Hold every video 😁

  • @WraithlingRavenchild
    @WraithlingRavenchild 10 หลายเดือนก่อน +2

    What's up with the phone, you the one that calls Sabine Hossenfelder?

  • @weirdsciencetv4999
    @weirdsciencetv4999 10 หลายเดือนก่อน

    Could you please do an episode on dynamically balancing things? Like a setup that measures amplitude and phase of vibrations and then computes what amount of mass to remove and where.

  • @RevUnstableBoy
    @RevUnstableBoy 10 หลายเดือนก่อน

    I think what was happening with the first design was the gear was out of proper timing between the holes for the output bearing and the gear teeth. much like having to put the gear halves together so that the holes and the gear teeth line up, they have to be timed inside the outer gear so that they mesh properly with the holes lining up properly.

  • @colonelbubble
    @colonelbubble 10 หลายเดือนก่อน

    I think you misaligned the disks in the first version, causing the wobble. Given 20 teeth and 6 holes, there should be 3 distinct positions for the disc relative to the other when mounted on the 6 studs. Look at the overlapping circles, they seem to be asymmetrical (as seen in 6:07)

  • @piotrnod6489
    @piotrnod6489 10 หลายเดือนก่อน

    That belt slip could be a safety feature, so your new entrance barrier (to the parking spot at your house maybe) wont kill anybody xd

  • @eelcohoogendoorn8044
    @eelcohoogendoorn8044 10 หลายเดือนก่อน

    Seems the first version may have been assembled at an offset? I think there is multiple almost-aligned ways of getting the discs in there; looks like that to me.

  • @KodakYarr
    @KodakYarr 10 หลายเดือนก่อน

    The first iteration might have had one of the gear wheels off by one tooth from assembly, causing the weird wobble

  • @theinterwebs4443
    @theinterwebs4443 10 หลายเดือนก่อน +8

    I'm surprised that James hasn't tried to build an RV Gearbox (rotate vector), which would be more powerful then just the cyclodial gearbox.
    I believe Nabtesco from Japan has the patents and is credited with the design. There are CAD models available from the Nabtesco website too.
    There are some very impressive capabilities of the RV gearbox.

    • @dennisdecoene
      @dennisdecoene 10 หลายเดือนก่อน +1

      If it's patented, then there is the answer, he does only open source.

    • @roseroserose588
      @roseroserose588 10 หลายเดือนก่อน

      @@dennisdecoene patents only apply if you're trying to make money, if you're just doing it for fun you can do what you want (:

    • @tasa4904
      @tasa4904 10 หลายเดือนก่อน +3

      @@roseroserose588 Yes, but then he can't publish it for the public to reproduce without seeking permission first. Because he uses an incompatible licensing scheme.

  • @cbs1556
    @cbs1556 6 หลายเดือนก่อน

    So much work being put into something that will last 3 months of continued use maybe. I wish you would implement more aluminum T slot frames to negate some of the slop in your material of choice. just plan your 3d prints around the T slot frames and you would run into less issues.

  • @NiksSofa
    @NiksSofa 10 หลายเดือนก่อน +2

    you need to drop the phone joke. it's through.

  • @rikes7855
    @rikes7855 10 หลายเดือนก่อน +1

    Are we still in the 80's, why he using a POTS phone?

  • @JessWLStuart
    @JessWLStuart 10 หลายเดือนก่อน +1

    If James Bruton was on Gilligan's Island the castaways would have been home by the end of the first episode!

  • @Zarundo
    @Zarundo 4 หลายเดือนก่อน

    Have you considered printing the cycloidal disks, or any other part, in any TPE to make them more quiet running?

  • @brucecarothers441
    @brucecarothers441 10 หลายเดือนก่อน +1

    I greatly enjoy your channel and the cool things you do with 3D printed parts. That being said, please stop using the red telephone handset as a microphone. It is quite distracting and really serves no purpose. A wireless mic designed (in black) to be minimally present would be more appreciated. Thanks.

  • @CaptainXJ
    @CaptainXJ 10 หลายเดือนก่อน +5

    What's with the phone?

  • @anonymous5405
    @anonymous5405 10 หลายเดือนก่อน +1

    Who are you talking on the phone with

  • @0r3nw4750n
    @0r3nw4750n 10 หลายเดือนก่อน

    What about cooling for the motor?

  • @dekutree64
    @dekutree64 10 หลายเดือนก่อน

    I can't believe how well that second one worked while still having the skinny ring. I've always proportioned them with OD = 1.5x disc diameter, whereas yours looks like 1.2x.Taking some rough measurements from a screenshot, I think that would make the solid ring (excluding the teeth) about 3x thicker, so 27x stiffer. Maybe I've been overdoing it...

  • @Eddy_AREA99
    @Eddy_AREA99 10 หลายเดือนก่อน +1

    Hi James, huge fan here. Your content is always a source of inspiration, blending creativity with technical insight. It's clear the role sponsorships play in facilitating your projects, and while support is essential, the recent increase in sponsored segments seems to detract from the fluidity and engagement of your videos.
    Perhaps there's a middle ground where sponsorships can be integrated more naturally, without overshadowing the fantastic work you do. Maybe shorter sponsor messages or a dedicated spot that doesn't interrupt the project flow could help maintain the integrity of your content.
    Thanks for all the hard work you put into your channel. Your projects have been incredibly inspiring, and I look forward to seeing how you'll navigate this challenge. Keep up the great work!

  • @GrayGames1542
    @GrayGames1542 10 หลายเดือนก่อน

    nice to see your still doin stuff

  • @ethanmiller5487
    @ethanmiller5487 10 หลายเดือนก่อน

    You could make that a hands-free phone with a rubber band or sweatband like all the cool kids lol

  • @AlexanderBurgers
    @AlexanderBurgers 10 หลายเดือนก่อน

    I think it matters to align the cycloidal wheels, because 20 doesn't divide by 6.
    Pretty sure that's why the first one was flexing and unhappy the moment you bolted the output on, the holes for the output 'pins' weren't aligned right.

  • @rommelfcc
    @rommelfcc 10 หลายเดือนก่อน +2

    😊 very satisfying to watch cycloid gearbox drives 😊 💖⚙️💖

  • @Koooo4
    @Koooo4 10 หลายเดือนก่อน +2

    I think we can drop the phone gag at this point..

  • @Pgr-pt5ep
    @Pgr-pt5ep 10 หลายเดือนก่อน

    The size of the 3D printed parts he makes scares my like a kid would when getting close to a steam locomotive.

  • @906MediaProductions
    @906MediaProductions 10 หลายเดือนก่อน

    What if you made an eccentric motor mount, locked the motor output shaft to the main structure and powered the motor with a slip ring, letting the motors body spin install of the body being stationary.

  • @rolar321
    @rolar321 10 หลายเดือนก่อน

    Interesting. Is there any use of this?

  • @makerslife
    @makerslife 10 หลายเดือนก่อน

    Can you make one using a hoverboard motor? They are cheap 2nd hand and have plenty of tourque!

  • @nlingrel
    @nlingrel 10 หลายเดือนก่อน

    Seeing it back-drive with the long lever arm made me think about a water wheel for generating power.

  • @MrEthereal
    @MrEthereal 10 หลายเดือนก่อน

    I always wonder if it's a struggle for you to get the tolerances correct between all the press-fitted parts, or if you usually get it first try nowadays.

  • @terencem9962
    @terencem9962 10 หลายเดือนก่อน

    I really appreciate folks that contribute significantly to open source technology development. So many smart and talented people do, and the world is way better because of it. I think the mentality people have to developing technology openly and collectively is a superior way of existing than the purely capital and greed driven alternative. Sure capital and greed driven projects have given us a lot, but had these been open source developments i think the world would have advanced much quicker. Look at 3d printers. It was only the expiration of patents that saw the technology really take off, and even though prior to that systems were available to those willing to pay, they were so few and far between and too prohibitively expensive that they really weren't the great contributors to productivity that modern 3d printers have become. Maybe i am wrong about this. I only know the pub science facts, but that is my take on the whole 3d printer patents thing.

  • @ihydf
    @ihydf 10 หลายเดือนก่อน

    Sweet! Now make a harmonic drive with a spline that isn't made of jello and a wave generator that doesn't just support the spline where the teeth engage!

  • @Blue-bf8lv
    @Blue-bf8lv 10 หลายเดือนก่อน

    allowing the public to create their own customizable robo dogs is amazing.

  • @42maneatingplants14
    @42maneatingplants14 10 หลายเดือนก่อน

    I love that it's a compact gear reduction the size of a basketball.😂