Geometric Error Measurement and Compensation of Machines

A general methodology for increasing the accuracy of machine tools by compensating for the inherent systematic errors is described. This methodology in

A general methodology for machine tool accuracy enhancement by error compensation

Improving CNC machine tool accuracy has received significant attention recently. This paper intends to provide an introduction of the real-time error compensation methods as applied to reduce both geometric and thermally induced quasistatic machine tool errors. An illustrative example is used to demonstrate the use of error compensation systems for a horizontal machining center. Although several industrial applications of these error compensation systems have achieved significant results, a few major barriers have prevented this promising technology from being applied widely in manufacturing. Several ongoing research activities aimed at overcoming the barriers are also presented.

CNC Machine Accuracy Enhancement Through Real-Time Error Compensation

Real-time compensation of time-variant volumetric error on a machining center.

A Displacement Method for Machine Geometry Calibration

An analysis is made of the displacement, planar and volumetric errors of multi-axis machines by determining the combined effects of errors in the measuring system and errors in geometric features such as linearity of motions and orthogonality of axes of movement.

A. J. Scarr

Papers

The Determination of the Volumetric Accuracy of Multi Axis Machines