In machining production, it has not yet been possible to systematically record tool wear during ongoing milling processes. However, since faulty tools lead to quality losses, increasing rejects and high costs for rework, the Fraunhofer Institute for Production Technology IPT has taken on this task: Together with partners, the researchers from Aachen, Germany developed a system of cameras and image processing using artificial intelligence, which is already in use the machine tool can record and evaluate tool wear.