Author(s)

T. Schlicksbier & J. Braasch

Abstract

Besides making it possible to machine a workpiece from more than one side without changing setups, rotary tables on machine tools enable the use of shorter and therefore stiffer tools and a more well-directed influence on tool action. Concomitant with these benefits is the geometric and thermal error caused by the rotary table in the production process. This paper describes the first results of examinations with a 6-axis measuring method of the static and thermal errors of rotary tables. This method makes it possible to measure two pitch movements and three translational displacements in addition to the usual positioning accuracy of the rotary axes. 1 Introduction Rotary tables are used in machine tools as a fourth axis. In the majority of cases - about 85% - NC-rotary tables with worm gear are used. Such high accuracy worm gears have a degree of effectiven

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