Balancing a rotor with an oscilloscope

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This rotor balancing machine is easy to make and not expensive. It is very accurate and you can cusomize to any rotor you need. It cost only 12 usd in parts if you already have the osciloscope and the spin motor.
I`m using two accelerometer and a reflection sensor. They are very cheap can be found on ebay.
Based on the amplitude and the timing between the refference point I can determine how many degree I need to add extra weight to balance it.

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14 окт 2024

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Комментарии : 62

@olegiakovlev2757 3 года назад

Thanks a lot for sharing this. I used same principal to balance fans on 2.5 MW generators (Leroy Somer), and tried to find this principle explanation, your video is great source!

@TqSNv9R0iG5Ckxew 2 года назад

Matthias Wendell has similar examples on both of his RU-vid channels but this novel approach using a speaker as a transducer is my favorite ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hGGJYXjE5s0.html

@lj516 3 года назад

Amazing little project that is simple yet incredibly effective!

@Electric-Motor 3 года назад

Great video, I think it's great that you show here that you can also achieve a lot with simple tools.

@alessandroandrenacci2372 Год назад

Thank you very much for your video, also your english is for me very clear ( i'm not English or from States, i'm from Italy ... ) I do appreciate the start line ( and it's trigger to the oscilloscope ) which is to be considered the zero angle of a 360 degrees revolution ... and the following position of the eccentric weight ...

@DS_92 2 года назад

i wish you would return to making content. your work is fun to watch and i like that you explain things very well!

@gadgetwob 3 года назад

Very neat, nice job! I think that scope supports averaging which would take all that high frequency noise out.

@iulian207 3 года назад

The low pas filter can can only be 20Mhz. Way to much than needed.

@gadgetwob 3 года назад

@@iulian207 No I didn't mean the lpf. If I recall correctly you can set the acquisition mode to average over 32, 64 or 128 samples. The results can be amazing!

@iulian207 3 года назад

@@gadgetwob Sounds very nice, i will check if i have that setting.

@ryanrobinson130 3 года назад

Great info. I love this kind of project!

@ovalwingnut 3 года назад

Fantastic job! Really well explained "and" I WANT ONE !!!! Thanks so much for your efforts. Cheers from SoCA.USA

@FrankReif 3 года назад

I'd be interested to know about how other mounting design for this setup would compare. My understanding is that suspended carriages allow for more sensitive plane motions to be detected. However, the suspended systems seem unnecessarily complicated - instead you could stiffen the stands and allow the bearing mounting brackets to slide laterally on top of them within a limited range of motion and move the accelerometers onto the moving plane.

@DuncanAitken 3 года назад

Very elegant solution! I love it.

@thomass7877 2 дня назад

Hello. Great video.. I know I'm 3 years late but can you demonstrate how you connected the accelerometer to the oscilloscope? Provided that the device still exists, of course... 😊 Thanks...

@Ryan-dz3jo 3 года назад

Very cool, nice demonstration.

@davemac222 2 года назад

Nice setup. Can you provide a few more details on it? 1. What accelerometer off ebay did you use? I see alot of the GY-61 ADXL335 analog output ones that have a theoretical max BW of 1600Hz, but that is with the smallest filter capacitor on the output, and I doubt a lot of those boards come like that? I think my particular motor maxes out below 1K RPM, so what sensor BW would I need for that? How do you figure that out exactly? 2. What IR sensor board did you use? 3. Is there anything special with your motor mount design to provide for vibration sensitivity and how the accelerometers are mounted? Are you attempting to float the axle mounts somewhat or something else? thanks!

@DynoRC 3 года назад

Nice solution

@DiyEcoProjects 3 года назад

*Dear iulian207* Custom rotor balancing machine. hmm... interesting. Thats clever, well done

@iulian207 3 года назад

Thanks, it was 2AM in the morning

@DiyEcoProjects 3 года назад

@@iulian207 lol... i know what you mean :)

@yachelcrofts9609 3 года назад

Thank you, I am enjoyinhg your research. What material did you use for your rotor laminations, it looks like aluminium, is this correct?

@ahmadkamseda2025 6 месяцев назад

If possible explain more about acceleration sensors you have used

@johnglsmith 5 месяцев назад

This is great information. Thanks for sharing.

@capcloud 4 месяца назад

this is great setup but the motor cannot engage with the rotor in the center as that influences the forces, which prevents you from balancing correctly. you want to rotate through the axel (shaft)

@DavidBuzz 3 года назад

Nice work... can u tell us what the specs of the accelerometers are? Eg, how many G's are they rated to? 1g? 16g?

@iulian207 3 года назад

1g, 1600hz

@efanutz 5 месяцев назад

Please , can ypu help us with some links for those tinny devices, accelometer for arduino and the other from the axel? Thanks you in advance

@D.Dimitrov 10 месяцев назад

Can you tell me please, what is the exact type of reflection sensor that you use? If you have a link it will be great! Thank you in advance!

@PeteBrubaker 10 месяцев назад

This is awesome, thanks!

@victoryfirst2878 Год назад

Can you tell me how accurately you can balance the motor to within how many grams Sir ? Would be nice you make a video on the setup you have here for us all to learn on RU-vid Sir. Have a great day too.

@Doctorbasss 3 года назад

Brilliant!

@miloudlemlem1520 Год назад

a really great idea thanks ..thanks !

@arielignacioacosta1111 3 года назад

Awesome! I will make it. I was looking for this machine. Do you mind help me with some details?

@VITAKENNY 3 года назад

Very interesting. Do you have a way to build a low tech dynamic balancer? meaning no electronic parts ? but use gage only?

@melovescotch 3 года назад

Which on on ebay for the accelerometer and reflection sensors?

@GyratingtheTAL 3 года назад

Great video, thank you!

@LeRaphael2600 Год назад

that is very Smart ! i searching solution cheap to balancing a Hub wheel i will reuse that idea, thx

@Arjen190170 3 года назад

Hello Julian , the accelerosensors have + / - and signal , how are they connected to the scope , where do you conect the signal ? I want do the same test with piezo sensors to see if they are more sensitive

@octapc Год назад

Doesn't the driving motor under the motor being tested create noise or additional oscillations?

@A2Stanton 3 года назад

I think maybe the oscilloscope pink and blue traces are at different V/Div settings? 🤔

@Hossein_m_pour 3 года назад

How can I make this test myself? What sensors and boards did you use?

@osvandremolinari 2 года назад

Amazing.

@Och_29 2 месяца назад

interesting. but securing washers with tape is not safe and dangerous.

@bosshoggett 6 месяцев назад

Smart man

@Hossein_m_pour 3 года назад

Hello What board did you use to connect the sensor?

@svio1 3 года назад

Really smart !

@limburgtower7563 Год назад

Who is the manufactor of this motor? An in which car ist it used ?

@iulian207 Год назад

Joule Motors Netherlands, it can be used in Any car

@bobdalah8374 3 года назад

Great !!!!!

@pafnucytv5337 2 года назад

Great

@cassette4964 Год назад

can i use a computer instead of an oscilloscope?

@aidannolan6656 7 месяцев назад

Check out USB oscilloscopes - essentially these devices are black boxes which take the inputs and connect to your laptop/PC via USB cable. These devices come with software and typically cost $60 - $80 - they are not as full featured as a proper bench oscilloscope 😢 but easily good enough to handle the outputs of the type suggested in the video🙂.

@jako8101 2 года назад

Adxl335 probably anolog acc, sensor infrared reflektive switch ebay

@NoviSavvy 3 года назад

Is it suitable for 150k RPM turbines?

@iulian207 3 года назад

The accelerometer has 1600hz range so it can detect speeds up to 96k RPM. For higher speeds you need something 2500hz range.

@FirstLast-tx3yj 3 года назад

@@iulian207 i was theoretically thinking about having DC motors that have very close anatomy to BLDC where the magnets move but still operate on DC battery power directly So i came up with a very realistically idea which is putting the brushes on the rotor wher they spin with it(the magnets or magnetic coils become the moving part) As for the comutator it will be sliced in half cross sectionally in order to split every commutator bar in half. The first half is always on the + and the second half only gets electricity when the brush passes over this specific commutator bar and closes the circuit Commutators and brushes are the carburators of electric motors and this method gets rid of the need of a complicated controllers, decreases the weight of the rotor because only the coils or magnets are turning and allows a dc motor with out runner and inrunner config Let me know if you would like me to share some details maybe images about the concept