A novel method for calibration of tool run-out in micro end-milling

In the process of micro end-milling, the axis of the micro end-mill does not coincide with the spindle axis on account of the inherent assembly errors, which is named as tool run-out. Tool run-out has a significant effect on the cutting force and surface topography predictions, and thus, accurate calibration of tool run-out is of vital importance. In this paper, a novel method was proposed to calibrate the tool run-out in micro end-milling operation, in which both axes offset and tilt were taken into consideration. The suggested method is easy to perform, and the calibration process is based on the analysis of the measured contour variations and phase shifts at different axial sections. Further, the verification tests were conducted to confirm the effectiveness of the proposed method, and the verification results show that the calibration accuracy is sufficient to capture the tool deviation.