Calibration of geometric error of 5-axis machine considering thermal deformation by the spindle rotation   Hiroki Inui, Soichi Ibaraki, Cefu Hong, Masahiro Shimoike, Shizuo Nishikawa       Abstract   Position and orientation errors of rotary axis average lines are often the most critical error contributors in the five-axis machining, and numerous schemes have been proposed for their on-the-machine identification, e.g. the ball bar tests and the R-test. However, in the conventional methods, it is difficult to consider the influence of thermal deformation caused by the heat generated by spindle rotation, because the spindle must be stopped during the measurement. This paper presents a method to identify position and orientation errors of rotary axis average lines using a laser tool measurement system. It is possible to measure the geometric errors while the spindle is rotating. The rotary axis geometric errors identified by the proposed scheme are compared with those estimated from the geometric errors of the machined test piece.         >> Back to Home