Your setup was so clear that it was immediately easy to comprehend. Good teacher.

That's the best explanation I've seen so far. Took a good deal of effort to setup.

For years I have wondered how robots with compact reduction gear assemblies were able to work without backlash. I had always assumed there was a sun gear assembly inside, so it never occurred to me it was a "harmonic drive", which I heard of but didn't grasp the meaning. I learned so much today and it was awesome. Thank you very much, I needed that! :)

A possibly belated, but no less heartfelt and sincere thanks for taking the time and effort of making this absolutely EXCELLENT video. Explaining a complex subject matter in a VERY clear concise and approachable manner. It is in my opinion "pearls" like this video that makes Y.T. worth while. Best regards.

I subscribed because you talk slow enough for someone to follow what you are saying and you leave the video on what you are showing long enough for the viewer to follow it.

Shared this video to my robotics class. Far and away the best video explaining how these drives work from the 5 I watched before this.

Great explanation. Now I understand the mechanics behind my new telescope mount drive. Very impressive!

goes from stories and anecdotes about harmonic drives to explaining them at 2:00

Easist tutoial that I 've ever got.

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!

Man i wish i had a teacher like this guy, school woulda been great

I have never even heard of these mechanisms before but I'm super glad I stumbled on this video. That was fascinating!

WOW What an amazing explanation. Thank you so much.

Thank you for the clear demonstration of the harmonic drive!

This is the clearest demonstration and explanation I've seen in a long time. Thank-you.

I had a great “Ah Ha” moment about 6 or 7 minutes into the video. I’m a now retired electronics technician who used to work in the production of printed newspapers. Equipment from a company called Ferag used harmonic drives and when we were trained on it the instructor told us what it did but couldn’t explain how it did it. To him it was a magical engineering marvel. In the years that followed we repaired them quite frequently. Usually the Flex Ring would crack and we disassemble the unit and replace it. I had a fair understanding of how it worked after working on them but you, my friend, brought it all together. I’m going to forward your video to my former coworkers who still have to deal with it. I’m sure they’ll appreciate it. Thank you.

Hands down ...the best video I have seen on harmonic drive.

Brilliant explanation, thank you for the clarity! This concept is really flexible (pun intended!)

I've read how this drive works multiple times but never were able to visualize how it works. It was a mystery to me up to now. Great teacher!

Excellent demonstration! Thank you so much!

This is a great explanation - well done!

I understand it immediately after your demo with those straight gear. Very clear explaination.

We use these drives in our surgical robots. Love the clear explanation and linear props to illustrate the basic physics. Thank you.

man this was a perfect explination, very good job! amazing drive motor design... the minds that come up with these things

In the '70s, as a 12 year old, I had a Visible Wankel Rotary Engine model which was driven by a planetary gear harmonic drive. I always assumed that this was how it worked, I was never sure until I saw this.

This was fascinating. I've seen it explained a dozen or so times but this is the first time I've actually understood it. Thank you!

Terrific illustration. Thanks for posting the video.

You explain extremely well! And your pronunciation is so clear. Cheers mate!

It looks like a perfect job for a wire EDM machine. Great explanation. Thank you.

I appreciate the clear explanation and effort of building the demo rigs.

Thank you! Wonderful demostration!

I appreciate the effort you put on to explain. Well done!

This is the best explanation of this mechanism I've ever seen. Thank you!

Excellent, thanks for taking the time to make this!

Zero backlash & fixed timing... 2 great attributes for a gearbox... 🤨 a lot of people don't realise just how important backlash , or rather lack of it , is.. anyone with a milling machine who trys climb-cutting better have NO backlash in their table feed... 😰 Great description, the use of the straight racks initially helped greatly to understand the theory behind these rather exotic & quite expensive units... 🤗 😎👍☘🍺

The best explanation of this drive. Point! Greetings from Munich, Tom.

Amazing gears. Thank you very much for the clear explanation.

Such an amazing demonstration!

Best explanation ever, thank you !

Considering buying a telescope mount that works on this principle and wanted to understand it. Your video helped a lot. The advantage of very low backlash in astronomical mounts is significant, as well as the reduced need for counterweights on the mount. Thanks very much.

The explanation is so clear and fantastic, thank you!

Beautiful simple explanation.

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

Great explanation. Thank you for the video.

This is an excellent video . I was having serious difficulty understanding this drive and your explanation brought it all together for me. I commend this instructor profusely.

Excellent explanation, thank you very much!

Many thanks for the demo and nice explanation.

Awesome Demonstration, you wrapped up the idea in a beautiful simple was with many tools

Thank you for an awesome explanation.

Clear explaination and great video. Thank you

Thank you! Wonderful explanation

Excellent explanations !!!

Very nicely explained. Great presentation!

Great model and explanation.

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

Great demo!

This is an amazing explanation. Thanks.

Thanks for the explanation. When I took aircraft maintenance our instructor had us make our own vernier scale using two pieces of paper with marks on their edges. It opened our eyes to the concept of a vernier scale. Later we had to manipulate a vernier coupling to change timing which was very simple for us. This differential of gear teeth I instantly understood from that course I took over fifty years ago.

Awesome lesson, many thanks 👏👏👏

Thank you so much for this video, very well done!

Great video! Thanks!

Thank you very much for the clear explanation! Love your videos

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

They are starting to be used in astrophotography-mounts, that’s how I got interested in the topic. No backlash is the magic that‘s so important in this area. Great explanation, that’s why they are so,expensive

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

This video is incredibly well presented.

Brilliant teaching, well done!

thank you for this awesome explanation and demonstration

Great explanation! Thank you!

Fantastic, thank you!

Really well done!

I can't thank enough to the person explaining very beautifully the concept of harmonic drive so good video ❤️❤️ love it it just instantly clicked in my mind how the mechanism works after seeing the demonstration

Thanks for the informative video! I didn't know I was curious about Harmonic Drives until I started watching your video. 8)

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

Very well demonstrated. Thank you

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

Outstanding it is Crystal clear now

Thank you for sharing

Such a beautiful explanation..

Been wondering how that works for a while. Thanks for making the video and explaining it

Great video, man.

Fabulous demo and lecture. Liked and Subscribed.

Amazing explanation!!!!

Fantastic dude !

Awesome explanation. Nothing to say other than many thanks !

Thank you. I learned something new today.

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

Excellent explanation.

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

Glad to see you up and running again. Be well.

Best explanation and drive model ever!

OMG THANK YOU… this actuator type has been _wrecking_ my brain for the last two weeks!

thx for this very brief explanation. it gives me clear direction where i hv to go for my arm. thx alot :)

Excelente explicación

Best explanation I've ever seen!

Amazingly educational, I 100% get it now

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.

It's so excellently explained! God Job!

Sir, you are a life saver.

Very, very good lesson!