Unbalance is the most common problem and it has found out in all-over rotating equipment. It takes a dominant amplitude at 1x rpm of machine speed to be indicated as an unbalance problem. It may turn into excessive vibration then ruined out the bearings or others machine components.
The cause of unbalance itself, occurs when rotating equipment has heterogeneous mass distribution which affects the machine to have partial heavy area that created massive vibration. It can be revealed when trigger has scanned by tachometer.
This will be done so with In-situ Balancing in complicated machine to damp the dominant vibration by putting the correction weight in unbalance area, then make the vibration to be head back into normal vibration amplitude value with no rotor dismantle, and definitely with no more cost needed.