Electronic homemade Drive shaft balancer

[Denis Julien]

Well after some iterations i finally do my electronic drive balancer ;-)

It cost lest than 10$cnd .

It works on a electric motor, i did not try it on my Quattro yet.

I putted a small micro on the electric motor to mesure the vibration. When the overweight is turning is passing by the micro and it tell me there is vibration there. To locate where is the vibration i use a reference point spot on the shaft and a optical emetter and  receiver.
So i know now where is located the overweight on a shaft. 

BUT i still dont nkow how much weight i need to correct it. It ll be iterations (as Bob said) to get the vibration as smal as possible.

I know there are more than 1 source of vibration, it ll be difficult to find where on the axis the overweight is or vibr source are ;-(.

Drive shaft on my Quattro ll follow.

Denis J