ฝัง
- เผยแพร่เมื่อ 10 พ.ย. 2020
- adash.com/
In this video we will introduce and describe the new Adash Advanced Balancing module and explain the basic balancing methods.
All of you know the standard balancing procedures. It is one plane balancing with one measurement point, it is two plane balancing with two measurement points. And generally speaking it is all balancing jobs where the number of planes is equal to the number of measurement points.
Now we should discuss a little about balancing procedures. If the rotor is unbalanced, then the heavy spot exists. The real balancing is the procedure when we find the position and weight of that heavy spot and then we remove it. Or we mount the same mass to the opposite position.
Let's begin with example. I want to balance the wide rotor. The rotor and two measurement points. Correctly I should do two plane balancing with two points. But I have an access to the plane 1 only. The plane 2 is for example under some cover and I have not access there. What to do now? I use the advanced balancing procedure. I need to enter two numbers. The number of planes - it is one. Next is the number of points - it is two.
Next steps are the same as for standard balancing. I use two sensors for point A and B. The first run is the initial run. I get the amplitude and phase for each point. Next is the trial run. Again two measured values. Now the result is displayed. It is the final mass weight and angle. But what does it mean?
If I have access to both planes, then I do two trial runs Then I get the two masses for plane 1 and plane 2. The vibrations should decrease theoretically to zero when I mount them. But if I can mount mass just to plane 1, then I get residual vibrations in both points. And this is the key point. I want get the residual vibrations as low as possible. And this is actually what advanced balancing can do.
You can define up to eight planes and up to eight points. For example 1 plane and 4 points. Or one plane and 8 points. Or 4 planes and 8 points, et cetera. The basic reason remains usually the same. I don’t have access to all required planes.
The advanced balancing gives two solutions. It means two sets of final balancing masses. The first is made by L2 norm. By other words it is the least squares method. It means that the sum of residual squares is the lowest possible value.
The second result is made by L infinity norm. The maximum of residual vibrations is the lowest possible value.
Let's show the example. / "example 1 plane and 4 points"/ If I have 1 plane and 4 points, then I have 4 residual vibration values. Now I will overact two results, which I get. The L2 result is 5, 0, 0, 0. The L infinity result is 3, 2, 2, 2. Now it is on me, what result I prefer.
The possible result is also no result. It means, that adding of any masses in any positions will increase the vibrations. But in real life you probably will not get this result. But with special theoretical values it is possible.
For example, I have one plane and two points. The initial run values are: 10 mm per second amplitude and zero degrees angle for both points. The trial run values are 14 mm per second and 45 degrees in point A and 14 mm per second and 315 degrees in point B. In this situation no mass will help you. Try to find out what is the reason. If you want to decrease amplitude in point A, you must turn the mass of plus 90 degrees. Then you get zero vibration on point A but two times higher vibration in point B. When you turn of minus 90 degrees, then you decrease vibration on point B, but you increase vibration in point A.
The advanced balancing gives also the sensitivity information of results. What is it? It means what would be the residual values, when I mount the masses with some error in position or weight.
I use the example again. I have one plane and two points. The result is 100 grams mass weight and 90 degrees angle position. The residual amplitudes are 2 and 3. But I mount the mass with some error. In weight or angle or both. The percentage residual values informs me, what would be the residual amplitudes if I mount the mass with 5%, 10% and 20% error.
For example I get 2,1 and 3,2 for 5%. 2,2 and 3,3 for 10% and 2,3 and 3,4 for 20% error. This is low sensitivity. I can mount the mass with error and residual amplitudes does not increase too much. But I can get 5 and 6 for 5%, 10 and 12 for 10% and 20 and 25 for 20% error. It is high sensitivity. I must use accurate weight and accurate angel to achieve the low near amplitudes 2 and 3.
I hope, that Adash advanced balancing will help you in many practice situations. - วิทยาศาสตร์และเทคโนโลยี
Good explanation. Thanks Adash.
Good explaination. Keep it up.
for dual plane & with all four sensor, Also which category vibration [level 1/level2/level3]
Please upload some tutorial for VA5 Pro Balancing Procedure on website/youtube.
Hello, I follow you from Iraq Is it possible for you to explain to us the analysis of the device readings and find out which mechanical part is damaged ... but in Arabic because I searched all the sites and I did not find anyone providing this excellent explanation other than your channel ... If you provide an explanation in Arabic I know that you will do a good deed for all Arabs ... Thank you
Hello Sir. We are creating some educational videos from time to time but we are mainly manufacturer of vibration analysis tools and related software. We recommend you to reach some company who offers vibration analysis training. We are sorry, but being a company based in Czech Republic we are not able to make videos in Arabic language. Contact our sales department which can guide you to your local Arabic speaking distributor. Email: revaj@adash.cz
nce 1..
I had one question.
You are drawn a cone what is the height of the cone. Or how to find out the angle.
If angle is negotiable then the meeting height is different...
Please clarify...
The cones do not have a final height, they are unbounded.Their steepness corresponds to the sensitivity of the increase in vibration to changes in weight or position of weights.
in vertical shaft, how to find the heavy spot potition?
Method mentioned in first minutes of the video won't work of course.
Why is not available for VA4? When is gonna be available?
We want VA5 Pro to have some advantage againts our VA4 Pro. Anyway, you can download our Virtual Unit and use Advanced balancer: adash.com/downloads/adash-firmware
@@AdashCompany As a person who bought the VA4 a month ago I feel a little bit saddened and kind of dissapointed that the VA4 starts to be the older and limited version of analyzer which will not be supported by new features (continous software developing was one of the main factors why i have choosen Adash). I understand that developing new features is costly and you have to earn money by convincing people to buy your newer stuff etc. Your policy "Buy once pay once" seems to be a disadvantage in that case where you stop to support VA4 with new features because for example my company would like to consider to pay additional $ for an usefull feature (MCSA, advanced balancing) and would defenitely not consider buying VA5 (especially considering that it is basically almost the same analyzer when it comes to hardware, only more fancy).
@@mieszkomarkiewicz3948 Dear Sir. We are unhappy that you are disappointed. But we never said that VA4 Pro device will have the same features as VA5 Pro. VA5 Pro has new user interface with touchscreen and some features are not even possible to implement into VA4 Pro. Making choice between VA4 Pro device vs VA5 Pro device is similar to make decision between Mercedes E Class or S Class. They are not the same devices. Software and firmware updates as well as support is still free of charge for all our devices. If your device is one month old we are open to offer you great deal. Please contact our sales department for more information: revaj@adash.cz
Info ?
3/12/2021
Are u assuming that half diameter is 1 ? and what is .25 meaning ? ,Is it in mm or what ?
It is just the geometry of vectors. You can use any scale (mm, inch,…). But the simplest way is use the radius = 1. The 0.25 is the length of second vector. In video it is 4 times smaller then radius, that is why it is equal 0.25. If you use the mm, then you must measure both vectors in mm. It is your choice.
@@AdashCompany OK I see this point.
I have another question, is there any manual method to make a 2 plane balance without using a vibration instrument , like the method in this video, this will mean a lot for me
@@SS-uf4uq Theoretically you can do this method on 1st plane and then on 2nd plane. But it won't be precies because planes always influences each other. Ideally is to measure amplitude, phase and speed on both planes. Baiscally use 2 plane balancing program like for example in our VA3Pro: adash.com/portable-vibration-devices/a4300-va3-vibration-analyzer
Ok
And if you add Arabic translation to your videos, this will mean a lot for us here in the middle East
Could not find the Revolutionary Method
My brain is spinning…