The influence of spindle rotational speed and radial speed on the accumulative pitch error was analyzed and its result was experimentally verified.

Research on Measuring Technology of Ultraprecision Gear Total Cumulative Pitch Error;

This paper introduces a principle of how to measure individual circular pitch error and total cumulative pitch error,at the same time comparative method is put forward.

Accumulated error control technique applied in small mass production of piece;

This paper introduces the principle of the 3D Optix laser scanner briefly,discusses the method of improving the data accuracy in single piece measurement and reducing the accumulated error of spliced joint in multi-pieces measurement with an applied example.

Firstly,the nonlinear problem and the cause of accumulated error for inertial strapdown attitude solution were analyzed.

With the purpose to reduce influence of accumulative error from the recurrence formula of residual stress measured with magnetic stress meter on the calculation result,based on the consideration that the stress at a same measuring point has no relation to the measuring order,the author proposed an improved calculation method for the work piece with free boundaries on both ends.