The paper presents preliminary results of the research of tool condition monitoring based on both original and demodulated signals measurements of an vibration generated by a cutting process in milling. The experiments have been performed on the milling center (CNC). Because the dynamic characteristics of tool vibration in machining process will change with tool wear development, which is one of the important dynamic characteristics of tool vibration. The signals were analyzed through FFT analyzer and computer (realised in the environment of NI LabVIEW). Work supported by the Grant 3 P06L 025 24 from Committee of Scientific Research of Poland.
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