Відео

perfect

great design great job. thank you

Not sure why so few views. Definitely needs a bump up

5:22 the taking with hands segments is weird bro

Dyneema...

17:07 and this is how, ladies and gentlemen, detroit become human

This content is a pure gold. Holy damn this man is talanted!

Good

Genius content! Thank you! I'm subbed

I think miscalculation is due to not considering thickness of wire

Very interesting, am looking at a cable/tendon driven arm. I was going to use a tension block with pulley to maintain a set tension on the cord using a mechanical advantage. With a sensor this can also trigger a maintenance or replacement alarm and have hopes of providing some cushioning if a large force is suddenly applied unexpectedly on the arm. This could also move like a cam to compensate for different loads. Maybe I'll check out the stretch less chord first!

Amazing project! I want to build a robot in the future and is nice to have options specially when they can have a nice performance and reduce cost.

8:1 if the cable is thin as a hair. The turns are the radius of the drum + radius of the wire to its center. (Just guessing quickly. 1/3 into watching). Very cool btw.

Aaed I realy like your stuffs', you are talented!. Why dont you try to update your platform like this.....ua-cam.com/users/shortsPfjV1vAq0rU

If you did more turns on the small drum, could you get the same friction with lower tension on the rope/cable thus mitigating creep?

¿como se llama tu tableta?

A logical development would be to now have balls of variable mass (or other physical properties?) It would be nice to see plots of the error with time. I think you could make the algorithm tune itself. Fuzzy control might also be possible. Great work!

You did an amazing work man! Keep going!

Really excellent project and presentation.😃 I rarely watch these to the end. A seamless flow of logic and reason. Of course there are loads of applications for these mechanisms but should we expect a robot that jumps and writes on walls?-)

That was some of the best 20 minutes I've spent

What's wrong with your hands?

this cord reduction system looks very promising. i once had a similar idea. the advantage of this one is that, as with living creatures, the cord can be seen and used like muscle, tendons and bones in humans.

What about chain drive?

15:30 You can call this robot "The OCD Tormentor Bot" :D Loved the video, really well explained and interesting!

It was a really interesting video. I make a similar project when I was at the university. It was really hard because we only had one month. With My team we improvised most of the project, we used PVC tubes for the container but it was really interesting. I was shocked of how much this project cost, 400 bucks! I was wondering how much time does it take to build this actuator. I mean from the time of this idea came up until this finally product. Please keep uploading videos like this It is really helpfull for new engineers!

Really interesting, The other day I realized a similar test with some new filament

Nice, I was wondering what was the display for

try using a chain

This seems good from an engineering standpoint, but it seems like it would be a lot less durable than a standard gear. Rope would stretch and fray with time, and age+heat would speed this process significantly. Steel cable may do better, but if the strands in that cable start to break overtime from being bent over a small grip-cylindar... same issue. Im sure it works for lots of stuff and maybe im overestimating the wear and tear (though the video shows the problem with steel cable). Gears are jusy pretty hard to replace because they are 1 solid molded substance and as a result are incredibly durable. Okay halfway through the video and realizing he runs into these problems. Still dont think his solutions solve long term durability problems, especially when heat from an enclosed motor is involved, not to mention friction when the motor is set to a higher speed with any sort of weight applied.

That's really interesting. Years ago I took apart an old hard drive from the 1980s and it used what I have now learned is a capstan drive to move the head across the platter, back when they used stepper motors instead of magnetic voice coils. Thanks to this video I also learned why they used a thin metal band (where the rope is used here) and that they probably chose the capstan drive due to the minimal backlash. Thanks for explaining everything so well in this video!

Do you have a video of the same testing with gears?

Try kevlar rope.

TIL that .9 inches is more than enough!

i havent heard d:d in such along time im almost offended. was is Gabreil Iglasias that use to say that ?

Is the 8 vs 8.5 discrepancy because the real ratio ought to be measured at the Center of the cord? Ah, the groove…. Hmm surprising that didn’t work….

😂 Thats amazing !! Your highly skilled.. Just a suggestion for future testing...maybe try Archery/ Bow string.. surely would hold up to what your intentions for use are.. Ive had compound bows sit for yrs and yrs with no stretch to the draw strings. idk, just a thought Keep up the good work my frien!👊

Just amazing video! Thanks

Hi (: Can you also test the efficiency and repeatability of the system? About the ratio, maybe adding a string radius to each diameter can help🤞

Ive been trying to design my own floght sim motion chair, and this is perfect for the drive motors!

This could be used as an actuator on a 3d printer. This would be especially useful on large 3d printers

I've used Vectran cordage on safety tethers on ISS. They are pretty inelastic but you need to 'soak' them underload for a day or so to get any possible stretch out of them. For 3/16" cord, I think we put 1000 lbs on a pallet and left the cord hanging overnight. Also use Brummel locking splices to make knots to develop the maximum strength of the cord.

what makes gears noisy is not that you 3d print them. It's when they're not angle/hypoid cut. I'm sure you could figure out how to do that on your printer. They still would have the backlash tho.

prob a javascript rounding issue mate

hahhah yo mama joke was perfect

Really interesting, and very well presented. Bravo. Subbed.

Cool video

damn I luv your vids

3:50 Yo mama so fat, she breaks newtonian physics

Would using stepper motors be helpful?

Both drums should be mounted on spring loaded brackets so that the tension is always the same between them no matter what happens to the rope