Method of real-time control and data processing of the laser roundness instrument

In this paper, the methods of real-time control and data processing are presented, which is used to measure the roundness error (RE) of rotating parts on production spot. The non-contact measurement of RE for different section can be realized by using the rotational and axial feed servo control system. It has many features such as high speed, high precision and non-contact automatic measurement, etc. Its main specifications are follows: measuring range is supper to (Phi) 500mm, resolution is 1 micrometers , repeatability is +/- 0.5micrometers . The working principle and overall structure are briefly described, the methods of the separation of eccentric error caused by installing the part and the computer real-time control and data processing are discussed in detail.