Current of the Linear Motor-based Condition Monitoring in Milling

摘要

In recently years, a number of machine tools have been built using linear motors. These machine tools have great potentials for precision and high speed machining. Nevertheless, a number of problems remain unsolved, such as monitoring and control. This paper presents a new tool breakage monitoring method for this type of machine tools by using the current of the linear motor. From a mathematical point of view, the new method uses a nonlinear energy operator to capture the abrupt changes of the motor current signal, which is directly related to the tool breakage. The experiment validation is included.