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  @jgraham824814 күн бұрын

  Thank you for the clear demonstration of the harmonic drive!

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  @agrutter872 ай бұрын

  I'll bet hoverboard bldc motors would make a good servo

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  @senadgalijasevic85682 ай бұрын

  I dont get why it needs flex spline? Why not just two gears instead of bearings at 6:50?

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  @garvincottle36242 ай бұрын

  Fantastic, thank you!

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  @nightlight0x07cc4 ай бұрын

  so uh Why not use two gears freewheeling where the lobes would be on the internal cam instead of a flexspine? you would still have the wedge-driving action, but it wouldn't require whatever process is needed to make a flex spline. I bet you could even install the inner gear bearings into slots axial to the "lobes" of the "cam" and spring load the gears to push away from the center so that you compensate for wear overtime and don't develop backlash. It'd be kind of like a planetary gear set, so I'm calling this a binary sun gear set until someone tells me it already exists xD

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  @prashantpatel35584 ай бұрын

  This is the most amazing and useful video i have seen in a long time. Thank you for explaining this. I was really struggling to understand exactly how it works. You are an awesome teacher.

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  @1414141x7 ай бұрын

  Fantastic explanation and the hardware was really good. I now know 'Harmonic Drive' has nothing, at all, to do with music.

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  @ChillGuy5117 ай бұрын

  Great video! Thanks!

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  @robotcobit64398 ай бұрын

  Easist tutoial that I 've ever got.

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  @baiyuwang6298 ай бұрын

  this explanation is wrong. just check the direction of the rotor and stator on a real harmonic drive, their direction is reversed.

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  @rmsv8 ай бұрын

  Having read wikipedia article first, I had a hard time understanding this video, as you use 3 gears instead of just 2.

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  @user-tm8ir3po5h9 ай бұрын

  Best explanation I've ever seen!

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  @alanlam85729 ай бұрын

  It's so excellently explained! God Job!

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  @weemingkoh10 ай бұрын

  Great teaching! I have learnt a lot. Thank you.

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  @VolklgirlKat10 ай бұрын

  Need volume, can't hear you

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  @tobywan12 Жыл бұрын

  Is there really no backlash at all?? Surely youd get some between the mesh teeth?

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  @vidhyasagar1990 Жыл бұрын

  Hello Sir, I hope you are doing well. Please let me know if you are using FOC and PVM for control? Of it is a different control technique? Are you using back emf for sensing?

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  @saravanampatti1 Жыл бұрын

  Sir, you are a life saver.

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  @sputnik4216 Жыл бұрын

  Wow, you're a great teacher, your video is terrific and I now know something completely new about gear drives. Years ago I got a fanuc welding robot arm and was amazed at the zero backlash on the joints but never knew why it was possible until now. As for how to get 2 more teeth with the same pitch, it's hits me now that the outer ring is naturally LONGER than the inner one, hence can have 2 more teeth in its' path. However, sizing up the tooth depth to accomodate the mating, etc is a challenge.Thanks for this explanation and I'll look at more of your videos in the future.

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  @sputnik4216 Жыл бұрын

  At the 1 minute mark , lunar rover, notice the pilot doesn't move, at all, he is utterly frozen in position, head does not swivel to look left into the turn, arms and hand positions utterly frozen in place over all bumps, rooster tail dust from wheels in a vacuum seems very out of place, rate of wheel dust collapse to the ground seems incredibly fast for 1/6 gravity conditions and rover cart seems to have no suspension give at any wheel - maybe a tad but not much if at all, and the antenna doesn't wiggle except at the end of the clip at the strongest bump ... just my observations ... anyway eager here to learn about harmonic drives!

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  @backho12 Жыл бұрын

  Super great explanation. One would think that the flex spline gear would fatigue over a short time, but they're so widely used in so many applications that it must not be an issue. Thanks for the great video demonstration!

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  @whenpigsflyobservatory Жыл бұрын

  Thanks for the concise explanation. I can see that these drives have multiple applications beyond the world of robotics. As an astrophotographer who deals with backlash on a seasonal basis (ambient temperature variations) this technology would be exceptionally well suited to telescope drives. My impression is that this type of mechanism would be less prone to backlash due to temperature variation. Chhers!

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  @joneslu1377 Жыл бұрын

  I must subscribe to the channel. Immediately and deeply attracted by the awesome demonstration and teaching. Thank you!

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  @StereoSpace Жыл бұрын

  Fascinating. Great explanation. Harmonic drives are showing up in telescope mounts and I wanted to see how they worked.

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  @tmhudg Жыл бұрын

  Really well done!

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  @leixinchang606 Жыл бұрын

  Thank you! Wonderful demostration!

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  @jeffreymorris1752 Жыл бұрын

  I finally understand harmonic drives. In 12 minutes. Man that's stellar.

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  @bpark10001 Жыл бұрын

  This is not a harmonic drive; It is a differential gear system, related to the split-ring planetary drive. In a true harmonic drive, the 2 high-torque members are the outer internal gear, & the flexspline, which is coupled to a cylinder terminated at its far end with a "bottom", forming a cup structure. There is no second internal gear. The bottom of the cup is the output & the outer gear is the stationary frame. The input is the wave driver. The outer gear & flexspline can be interchanged (output & stationary parts switched).

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  @nakfoor1846 Жыл бұрын

  Great video, man.

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  @laurencerilling5873 Жыл бұрын

  “Harmonic Drives” piqued my interest, but the differential drive ( e.g; windlass, boat hoist… ) is at least centuries old. I have one for heavy moving, mostly engine swapping, and probably older than me. The only confusing parts are your use of “complicated”, the new name, and the addition of poor engineering to this time-proven device.

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  @perspectivex Жыл бұрын

  Best harmonic drive mechanical explanation I've seen (out of at least a dozen I've come across)

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  @massimo541 Жыл бұрын

  Awesome lesson, many thanks 👏👏👏

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  @melody3741 Жыл бұрын

  I do wish you had explained how all three models you demonstrated were not the same concept and functioned differently

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  @larrypatterson3957 Жыл бұрын

  Great demo!

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  @rocketfuel- Жыл бұрын

  Clear explaination and great video. Thank you

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  @TheHirade Жыл бұрын

  Now I got it, thank you

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  @1stGenHomestead Жыл бұрын

  I 3d printed a barn door tracker for astrophotography and has huge limitations, I’ve been looking into a different way to make one that has less wobble and more load capabilities, I think I’ll give this a shot!

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  @kdenyer1 Жыл бұрын

  Had one fail on Cincinnati centre-less grinder in feed never got it fixed to expensive😮

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  @rogerbotting3459 Жыл бұрын

  I have heard of this but had never had an explanation. You provided a very good explanation.

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  @atheerna_app Жыл бұрын

  Could you please provide me your WhatsApp number

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  @MercyandTruthBibleChurch1611 Жыл бұрын

  Outstanding it is Crystal clear now

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  @dokepravin2916 Жыл бұрын

  Thank you for sharing

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  @henryfam58 Жыл бұрын

  You Sir defogged my mind in 12 minutes on harmonic drives, THANK YOU.

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  @N0B0DY_SP3C14L Жыл бұрын

  So here's a quick question: does the harmonic drive create an increase in torque, as what one would expect through a standard gear drive? More efficient? Less efficient? What are the benefits of a harmonic drive over a standard geared drive/transmission system?

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  @Noise-Bomb Жыл бұрын

  I work for Harmonic Drive and it really doesn't surprise me that these things last. Much care an precision goes into making these.

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  @mickmuzzmkmz1628 Жыл бұрын

  Nice video! Looking at these drives I thought that instead of having the flexible gear to wedge the stator and output gears, why not have a plantetary/harmonic hybrid? It would be like a normal planetary setup, but instead of the drive going through the planet gears, the planet gears would only do the job of the flexible gear in a harmonic drive setup, becoming the wedging force to do the reduction, while transmitting the force/torque. There would no longer be a need for the traditional sun gear as in a plantetary setup, so it could be omitted. The difference in gear teeth needed for this to work as a harmonic drive could be achieved by making the outer part of the planetary drive (is it called the ring gear?), in two pieces with a different number of teeth. These two ring gears would act as the stator and the output respectively, connected by the aforementioned planet gears (which may need to be slightly elongated to allow for adequate meshing contact between the two ring gears). By using planet gears to do the job of the flexible gear, it negates the need for it to be flexible, removing the weak link. Also, if you adjust the teeth size to outer ring gear diameter ratio, you could have more than two spots where the teeth "harmonize" allowing for greater force transfer, while dispersing the load for better longevity. Just a thought...🤔

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  @matttimmermans9583 Жыл бұрын

  You can make a harmonic drive without the flex spline, which is nice for 3d printing them: kzread.info/dash/bejne/aoKYwbSlitTJmc4.html

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  @l0I0I0I0 Жыл бұрын

  Is there a more reliable gear reduction device that can last decades? Anyone?

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  @l0I0I0I0 Жыл бұрын

  Love it!!! I need to make some of these but specialized use.

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  @alvesjnr Жыл бұрын

  This guy is a great explainer. Thanks for the video.