We have facilities & expertise to carry out ORBIT Analysis using Portable vibration analysers for large sized equipments like Turbines &Compressors mounted on Journal bearings.
Orbits are lissajous diagrams corresponding a trace of the relative movement of the shaft within the clearance of the journal bearings.
Example: In ideal condition the Lissajous Orbit takes a shape of is a perfect circle for Unbalance. Commonly, machines are stiff in Vertical direction (due to bolting to foundation/base and effect of gravity).
Hence the Horizontal & Vertical stiffness of bearings is not identical. This causes the orbit to be somewhat elliptical.
Similarly for other defects in Journal bearings, ORBIT helps in identifying & pin-pointing the inaccuracies......