Change point-based segmentation of machining cycles in electrical load curves of machine tools for data pre-processing

Motivated by growing awareness of sustainability and rising costs, a detailed allocation of energy consumption attracts increasing attention. Nevertheless, the potential offered by the inherent information in electrical load profiles of production machines has not yet been fully utilised. This paper introduces an approach for segmenting the load profiles of machine tools for individual machining cycles, aiming to reduce the manual effort in data pre-processing of the time series, e.g. for clustering applications. The approach’s applicability is examined on several machine tools. The performance of the approach is discussed using examples of load curves from machine tools.