Vortex dynamic balancer

dynexhobby

dynexhobby

Good vibrations
Hi SRbell,

1. Negative value is normal. It just means you measure in the opposite direction from zero. So if 0 to 360 is counter clockwise then you measure 112 degrees clockwise.
2. The 4 point warning message is telling you that your vibration during the trial unbalance at 0,120 and 240 degrees is way higher than the original vibration level. This is quite rare to get a message like this. Yes using a smaller trail weight will remove the warning. Did you try the "Trail Weight" estimator tool? It should give you an idea of the approx trial weight you need. Please send a photo of your setup and a screen shot of the 4 point method results. Seems odd you are getting this warning message. By the way where are you applying the trial weight?

cheers

DH
 


dynexhobby

dynexhobby

Good vibrations
Ahhh...it makes sense to me now. The problem is with the setup. Having the sensor way out changes the dynamics of your test rig. With the current setup, you are getting secondary harmonics due to the flexing of the beam/motor/motor mount configuration. See attached pdf document. Basically you want the motor to be suspended at the end of a plank. This should give you something close to a pure sine wave.

In summary Vortex is reporting exactly whats happening with your system (mechanically), that will explain why the sine wave bounces. In reality what is happening is that you are getting two sine waves superimposed on top of each other. That is, one at RPM frequency and another at the beam resonance frequency. Hope this makes sense. Also, try the "band pass" filter it works better than "low pass".

cheers

DH
 

Attachments

  • Multirotor_forum_setup.pdf
    384.1 KB · Views: 422

srbell

srbell

Member
Ok, I used the weight estimator but got a strange result for sure. My waveform fluctuates so much I don't thing the 4 point software can cope. My mv will fluctuate a goo 20 to 25 percent and going with the peaks doesn't work. The last weight solution showed about the same vibration as I initially started out, but you could see and feel the final balance was way worse than the original. BTW, I got rid of the extension but with no change in the wave form.
http://www.youtube.com/watch?v=SIYFgpOyYj0
http://www.youtube.com/watch?v=_ORM_LOyEkc
 

dynexhobby

dynexhobby

Good vibrations
I have created a video to answer your questions.

https://www.youtube.com/watch?v=fS5n3Qoue1c

You might also want to check out these two videos as well,

https://www.youtube.com/watch?v=Onn0NhW7BOU
https://www.youtube.com/watch?v=AjZ23L6aUQ4

Basically, use the peaks in the frequency tab to input into the 4 point method. It should give you the balance location. For the final weight, you'll most likely need to add/subtract weight until your vibration drops to the lowest you can achieve. Also, when recording measurements click on the "peak hold" check box under the frequency tab. This will help stabilize your measurement.

Another tip, if you use software filtering in the "scope" program turn off the filter on the Vortex unit. Should give you a better result.

cheers

DH
 
Last edited by a moderator:



srbell

srbell

Member
Needing a key for the new software. It's Sunday and I've got a rig that needs balancing so I was hoping you may see this. I sent an email as well, but I assume you won't be checking in until Monday : )

dynexhobby said:
This thread is for user support. Thanks.
Click to expand...
 

dynexhobby

dynexhobby

Good vibrations
Yep no problem, just sent PM with key.

srbell said:
Needing a key for the new software. It's Sunday and I've got a rig that needs balancing so I was hoping you may see this. I sent an email as well, but I assume you won't be checking in until Monday : )
Click to expand...
 








P

phalcon51

New Member
Yeah, it's working for me now. The first several times I tried it the computer just sat there for a long time with a blank screen. The last couple of times I tried I got a "502 Bad Gateway" error, whatever that is.

Glad to hear they're still around.
 

dynexhobby

dynexhobby

Good vibrations
Hey guys we're still around :)

In fact we just released a new balancer called "Impulse" which is a plug and play device.

Check it out!
 

You must log in or register to reply here.
Top