What Is The Significance Of The Orbit Shape ?

A more circular ellipse (i.e. when you move the transducer a certain angular amount, the mark shifts an equal amount) usually indicates: More of an 'unbalance' type vibration force (centrifugal force that is fairly equal all the way around) A flatter ellipse (i.e. when you move the transducer a certain angular amount, the mark either does not shift or shifts 180°) usually indicates: Flatter, more 'linear' motion indicates problems that affect a specific direction such as looseness, resonance, and (on belt or chain drives) bent shafts or eccentricity. These are Rules of Thumb and a number of variables such as structural strength (which can influence amplitude values in one direction versus another) much be considered. Phase analysis, however, can provide some important information related to how the components are moving.