Integrated low-power RFID-S-system for online temperature and high-resolution displacement monitoring on high speed spindle rotors

This paper presents a low-power RFID-S-system for condition monitoring in high-speed motor spindles. In modern metal cutting machine tools the machining result strongly depends on the motor spindles accuracy. Latest developments on high-speed cutting (hsc) and high-performance cutting (hpc) are leading to substantial increasing temperatures and mechanical elongations of the machine parts, which are resulting in decreasing machining precision. Beside wired sensors on stationary parts, temperature- and displacement-measuring systems on fast rotational dynamic shafts like the spindles rotor are very important, since this is the direct interface between the machine tool and the work piece. Different approaches for laboratory setups are known from literature. In this work, a fully spindle-integrated and tested solution suitable for mass production is presented.