Quality Assurance for Rotors and Shafts

Since the rotor’s magnetic field can affect results by deflecting the stylus or the inside of the probe, it is essential to use long and heavy stylus systems for measuring dimensional features with the tightest tolerances. ZEISS CMMs with active scanning technology are ideal for these requirements. Long stylus extensions enable measurement at each position of the rotor, keeping the probe far enough away from the strong magnetic field to ensure stable and accurate results.

Increasing speeds in e-motors mean that rotors must now offer significantly higher strength and stability. To prevent the rotor from breaking during operation, a certain porosity level must not be exceeded. Computed tomography from ZEISS is used to determine the size and number of pores in the rotor’s short-circuit ring. ZEISS software then analyzes and classifies the recorded 3D data by means of porosity analysis.