Modelling Machine Tools using Structure Integrated Sensors for Fast Calibration

Abstract

Abstract:Monitoring of the relative deviation between commanded and actual tool tip position, which limits the volumetric performance of the machine tool, enables the use of contemporary methods of compensation to reduce tolerance mismatch and the uncertainties of on-machine measurements. The development of a primarily optical sensor setup capable of being integrated into the machine structure without limiting its operating range is presented. The use of a frequencymodulating interferometer and photosensitive arrays in combination with a Gaussian laser beam allows for fast and automated online measurements of the axes' motion errors and thermal conditions with comparable accuracy, lower cost, and smaller dimensions as compared to state-of-the-art optical measuring instruments for offline machine tool calibration. The development is tested through simulation of the sensor setup based on raytracing and Monte-Carlo techniques.

The Use of 3-DOF Laser Interferometer for Rapid Estimation of CNC Drives Settings

“…These solutions are usually based on short-range distance detectors [4] or beam position detectors [5]. The instruments can be used in various cases [6][7][8][9] providing a set of geometric data as described, for example, in [10,11]. Still, one of the most versatile ______________ instruments for checking CNC geometry are systems based on laser interferometers [12].…”