Measurement of spindle error motions by an improved multi-probe method

摘要

This paper proposes an improved multi-probe method for measurement of spindle error motions. Four degree of freedoms (DOFs) of error motions of a spindle are measured in a dedicated setup using capacitive sensors. Three sets of probe angle set are carefully selected in order to overcome the harmonic suppression problems commonly encountered in the multi-probe measurement approach. The error contribution of each set of angles is analysed and then the measurement results are modified in frequency domain so as to minimise the effect of harmonic suppression. The evaluation of measurement results shows that this method is effective and possesses good agreement with repeated measurements.