Impressive explanation! I love how you created the apparatus in a simple way and yet, very effective to demonstrate the phenomena. Impressive!
@قبل14سنة-ع4و Жыл бұрын
Best explanation so far in youtube. I was so confused before watching the video. Thanks alot ❤
@YeanyScience4 жыл бұрын
Nice demonstrations pieces, I haven't tried them but your video makes it clear enough that I can imagine holding them in my hands and feeling the results. Well done. In the future if you think one of videos enhances a comment that you are making about something that I've posted, include the URL so that others may more easily find it, always interested in other's opinions
@antalz4 жыл бұрын
Thank you! I will do so in the future, I thought putting links in comments makes it very likely KZbin discards the comment as spam.
@tonyray42034 жыл бұрын
That's the best demonstration of balance I have seen very clear and easy to understand. many thanks.
@antalz4 жыл бұрын
Thanks, I'm glad it was helpful
@eranlevin2260 Жыл бұрын
Very clear explanation of the subject. Well done
@kozayagi4 жыл бұрын
Excellent video, the visuals allow for intuitive and rapid understanding. Thanks!
@antalz4 жыл бұрын
Thank you, I'm glad you enjoyed it!
@chuckgrigsby96643 ай бұрын
Nice explanation. Now to my problem: my washing machine goes out of balance on the low speed spin (at the end of the wash and rinse cycles), but not on the high speed spin (occurs twice on the spin cycle). I observe that as the machine spins up the high speed spin (spin cycle), there is an intermediate speed where the machine starts to go out of balance, but the rate of increase in angular velocity fairly rapidly damps that out. On the low speed spin (wash and rinse cycles), the angular velocity seems to terminate right at the point where the out-of-balance condition is at a maximum. It seems to me that, under the imbalance condition, the machine moves from side-to-side rather than at random, and I suspect that this is because the base is narrower in the side-to-side direction than it is in the front-to-back direction. Thus, I believe that the oscillation of the spinning unbalanced wash basket hits a vibrational frequency of the washing machine base causing the machine to make unpleasant noises and to walk around. The machine is designed with a "balance" ring at the top of the clothes basket that is filled with fluid. I presume that this fluid-filled ring is supposed to dynamically counter any oscillations that result from an imbalanced load in the basket. Inspection of the basket shows that there is fluid in the balance ring and there does not appear to be any damage to the ring that would cause a leak in the balance ring. I am having a hard time visualizing how a relatively small fluid-filled ring at the top of the wash basket can adequately stabilize an unbalanced load of wet clothing in the bottom of the basket. Alas, for my model, the balance ring cannot be replaced and the cost of a new basket is nearly the same as the price of a new washer. I should point out that the wash basket, the outer container and the motor and gearing are supported on suspension rods with springs to damp out vibrations. I am thinking that, in addition to springs, the suspension rods should include dashpots to overdamp the motions. Any thoughts about this practical application of the points made in your video? BTW, your video was the best I have seen about the subject of instability of rotating systems! Thanks.
@SankalpaRaymondal3 жыл бұрын
I thank you so much for this video. It has greatly helped me understand this concept!
@antalz3 жыл бұрын
That's great to hear, thanks!
@seshachary55802 жыл бұрын
very educative. Thank you great simulations
@suniljugale24683 жыл бұрын
Excellent .... these demo pieces clears the concept effectively. thank you.make more video on balancing.
@antalz3 жыл бұрын
Thanks! Do you have any specific topics in mind? I don't really have further videos on balancing planned at the moment. Creating a balancing machine seems like quite a lot of work, and I'm not sure how many people care that deeply.
@michaelmolter88282 жыл бұрын
The other thing to notice is the omega squared term. Things get bad fast at high speeds. You equation would imply that doubling the speed quadruples the magnitude of the vibration. Or going from 100 to 1000 rpm would increase the force 100x!
@akashganjoo87492 жыл бұрын
Really awesome, sir, is there any video in which u have showed dynamic balancing also?
@antalz2 жыл бұрын
I don't have anything showing how to achieve dynamic balance, I think you need a pretty specific measuring machine for that.
@zeerocool Жыл бұрын
Thank you! Awesome presentation.
@frankensteincreations4740 Жыл бұрын
Best example on the internet! 👍🤘👏
@TheMadMagician873 жыл бұрын
Good info, thanks for explaining this clearly and concisely.
@antalz3 жыл бұрын
No worries, thanks for watching
@gravityalchemist65992 жыл бұрын
Hello Antalz, I enjoyed your video a lot, did you create the animation?
@antalz2 жыл бұрын
Thanks! I'm not sure what you mean, everything shown in the video is my own work, and the files for the 3D printed bits are also my own.
@venkir14082 жыл бұрын
Very nice demo. Thanks a lot.
@rotorblade95082 жыл бұрын
nice demonstration. I didn’t know that was called dynamic balance I thought it’s just a way to balance the weel better, but it makes sense since it only occurs when you rotate it. I have a flywheel and it has a counter weight to balance the crankshaft and that means it can’t be balanced dynamically but that’s maybe one reason why the redline is 5500rpm .
@antalz2 жыл бұрын
That could be, though the flywheel itself should be statically and dynamically balanced. But balancing the crankshaft is very hard. You can look into primary and secondary imbalance, though I'm not very familiar with it myself.
@rajkishorebehera41714 жыл бұрын
Nice explanation sir.
@qwerty10116 Жыл бұрын
amazingly explained ! Thankyou
@marcusjuniusbrutus91383 жыл бұрын
great video. concisely explained
@antalz3 жыл бұрын
Thank you, thanks for watching
@Dan-qp1el2 жыл бұрын
This helped me, thank you.
@Yoyo-ug7wt3 жыл бұрын
Great video that really explains it. If one has dynamic imbalance how does one know the weight and distance from the center one needs to place it in order to counteract the dynamic imbalance?
@antalz3 жыл бұрын
That's actually quite tricky. What you can do is put the shaft in a pair of bearing, and then have the bearing housings supported by load cells. In this way you can measure how much force is exerted on the bearings, and by checking whether the force is in the same or opposite direction you can find whether you have static or dynamic imbalance. You can then run the math backwards to figure out where to place weights, but I haven't studied that math. You will have multiple solutions, you can use lighter weights if you can place them further out.
@Yoyo-ug7wt3 жыл бұрын
@@antalz Thanks for that explanation. I am going to try to figure it out.
@Yoyo-ug7wt3 жыл бұрын
@@antalz One more question if you don't mind. I am creating a wheel balancer as I need to balance many thousands of wheels. The wheel is 2" wide, 7" in diameter. If I have static imbalance that means I will have to place a weight on each side of the wheel at some distance from the center of rotation, correct? If I also have dynamic imbalance I will have to also place a weight on just one side of the wheel also distance from the center correct?
@antalz3 жыл бұрын
@@Yoyo-ug7wt Kinda, but you got it backwards. Static imbalance can be fixed with a single weight, dynamic imbalance needs to be fixed with 2 weights. If you try to fix static imbalance with just 1 weight, you und up creating static imbalance which needs a second weight to be fixed.
@Yoyo-ug7wt3 жыл бұрын
@@antalz But I am not sticking a weight right through the wheel to the other side like in your video. I can only stick it on one side, the other or both. If the wheel is 2" wide and has static imbalance and my weights do not extend right through the wheel to the other side then I will be creating dynamic imbalance by placing the weight only on one side won't I? My wheels are solid plastic.
@pkilo28113 жыл бұрын
Again, thank you very much. What is couple imbalance?
@antalz3 жыл бұрын
Dynamic imbalance = static imbalance + couple imbalance, so if you have a shaft that vibrates when it's rotating, one part of the vibration is caused by static imbalance, one part is caused by dynamic imbalance, and the total imbalance is dynamic imbalance. I'm not sure if those terms are universal. My analytical mechanics textbook makes no mention of the term "couple imbalance".
@pkilo28113 жыл бұрын
@@antalz Thank you. Reading a book written by Ricky Smith and Keith Mobley and it states..."There are four types of imbalance: 1. Static 2. Dynamic 3. Couple and 4. Dynamic imbalance combinations of static and couple. I appreciate your answer because the differences where not at all clear to me.
@antalz3 жыл бұрын
@@pkilo2811 Ow that's an engineering book. I find engineers like to define lots of catagories and situations. I was using a physics textbook, they like to define as few things as possible, it's more elegant like that or something. So my textbook only has static and dynamic.
@masyantokates14272 жыл бұрын
Great....love it Thanks
@TheMudfly80 Жыл бұрын
Looks like dynamic is just 2 plane balance, and that if the wheel rotated on a point instead of an axis you could determine dynamic imbalance using static methods?
@antalz Жыл бұрын
Well that's a weird way to think about it honestly. Rotation is usually regarded as being around an axis. Perpendicular to that axis is a plane. Maybe by "rotated on a point", you mean having the object spinning in free space. In that case the object will always rotate around its center of mass. Another way of looking at dynamic imbalance is that the axis of rotation is not one of the principal axes of the object. I'm not sure if you can measure dynamic imbalance using static methods, I believe not, but honestly this piece of classical mechanics has been ages ago for me.
@TheMudfly80 Жыл бұрын
Actually you are correct, even about a point you couldn't measure dynamic imbalance. For some reason I imagined the bolts sticking out in different axial directions creating a couple in a static scenario, but they only do this in a dynamic scenario where the forces are radially outwards. In a static scenario in a gravitational field they're both 'down' and cancel each others turning effect.
@lwazizulu82924 жыл бұрын
Great video..... Thanks a lot... 🙏🙏🙏🙏🙏
@antalz4 жыл бұрын
Thank you!
@klazzera4 жыл бұрын
you taught me something today, thanks
@antalz4 жыл бұрын
Glad to hear you found it useful, thanks!
@ashishhandique43912 жыл бұрын
Thanks a lot sir ✨It helped me a lot
@sayantanghosh67003 жыл бұрын
Great explanation.....
@antalz3 жыл бұрын
Thanks mate!
@joymech20063 жыл бұрын
How grooved pulley having keyway balancing done in balancing machine?
@antalz3 жыл бұрын
Not sure about that honestly, I think people just ignore it. The keyway is close to the axis of rotation, so it generally doesn't create too much imbalance. I don't think people do it for gears either. For when it is done, I don't know exactly how.
@shedmyshadows3 жыл бұрын
We make a half key
@tomthompson74003 жыл бұрын
great video.
@antalz3 жыл бұрын
Thanks mate, thanks for watching
@bulentalkan46864 жыл бұрын
Thanks from Turkey
@antalz4 жыл бұрын
No problem at all, warmest regards from Dutchman in Austria!
@pkilo28113 жыл бұрын
Thank you very much
@antalz3 жыл бұрын
Thank you for watching
@CaptainSwoop4 жыл бұрын
Well done ... Thanks.
@antalz4 жыл бұрын
Thanks, and you're most welcome!
@xr500t3 жыл бұрын
I've achieve static balance on my tires, but I'm experiencing Dynamic imbalance, and it's driving me nuts!
@antalz3 жыл бұрын
I think you should ask a mechanic shop about that, that's very difficult to solve without a tire balancing machine. I guess you should add zink weights to the inboard and outboard part of the rim, to create a dynamic imbalance to offset the existing dynaminc imbalance, but how much weight to place where is nearly impossible to figure out without a balancer.
@TheBingo19513 жыл бұрын
GRAZIE
@danielch66623 жыл бұрын
I don't need to 3D print these. I don't have a drill press. I've been bugged by these problems for decades. But not enough to go get a drill press.
@antalz3 жыл бұрын
A drillpress and 3D printer both aren't too expensive I would say. I think for many the real issue is where to put one.
@backwoods6050 Жыл бұрын
Imbalance is in your checkbook, unbalance is in your rotor.
@antalz Жыл бұрын
Thanks mate, I updated title and description but I'm afraid I can't update the video itself.