A Rotary Stage is a mechanical component of a motion system used to rotate an object in a single axis or plane of rotation. The terms rotary stage or rotary table are often used interchangeably with rotary stage. All rotary stages consist of a platform and a base, joined by some form of bearing or guide in such a way that the platform is restricted to rotation about a single axis or plane with respect to the base. In common usage, the term rotary stage may or may not also include the mechanism by which the angular position of the platform is controlled relative to the base.
Rotary Stages use a precision machined worm gear assembly and either ball, cross roller, or angular contact bearings to support the table top load. The selection of different gear ratios allow for either high resolution or high speed in a low profile package. The use of any step motor or servo motor system to drive rotary tables is a key advantage since it allows the use of a preferred motion control system.
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