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# Tire balancing calculation

## Tire balancing calculation

(OP)
Hello.

I'm looking for information about how to calculate the dynamic unbalance of a wheel/tire. My idea is to develop a DIY balancing machine. I'm a electronics engineer and software developer but don't have any clue about the theory of this kind of measurement.

Thank you all

### RE: Tire balancing calculation

UBplane1=TF1A*vibA+TF1B*vibB
UBplane2=TF2B*vibB+TF2A*vibA

All operations are complex math, TF is a measured transfer function between unbalance in one plane and vibration in another, UB is the unbalance, vib is the vibration measured at two places A and B, usually but not necessarily close to the unbalance planes 1 and 2

Cheers

Greg Locock

### RE: Tire balancing calculation

(OP)
Dear Greg Locock

Thanks for your explanation but it's still obscure to me. Can you give me a pratical example or point me to documentation specificaly on this subject? I've read about rotor unbalance and vibrations of shaft bearing systems but as I don't have a background on mechanics, I couldn't follow the theory.

### RE: Tire balancing calculation

(OP)
I forgot to say that I'm not developing a comercial balancer. My ideia is to create a home-made balancer and publish the plans on the internet. I already made a 1 plane balancer for motorcycle wheels but the 2 planes (dynamic) necessary to car wheels/tire eludes me.
Thanks for any help.

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