The Orbit display uses two data channels in the time domain. The signals from two channels are drawn on an X and Y plane to display the shaft position change versus the angle of rotation. Orbit displays give a two dimensional visual picture of the motion of a rotating shaft.
A well balanced shaft with no movement in any direction and would produce a dot in the middle of the plot. The shaft movement can give an indication of the vibration source e.g. if there is a lot of up/down movement it may be that the machine feet are not bolted down tightly enough.
To create an orbit plot you need to take a dual channel simultaneous measurement to capture data at the horizontal and vertical axes at the same time. The displacement or acceleration sensors must be placed 90° apart from each other.
The Orbit display uses a pair of measurements in the time domain. It does not require the technique of order tracking.
The Orbit display format is similar to Polar display, but it is constructed from 2 signals perpendicular to each other. Typically, it is associated with the current rotating speed of the shaft.