A Rapid Separation Method of Spindle Radial Error Motion Under Cutting Conditions

Measuring the radial error motion of a spindle during the cutting process is important for monitoring the machining quality of the workpiece and spindle running condition. The problem of long separation time encountered in the application of traditional methods is analyzed under cutting conditions. A rapid separation strategy based on step separation is studied. Combining the advantages of the bidirectional measurement and multi-probe methods, a rapid separation method for spindle radial error motion is proposed. Based on the characteristics of the first harmonic components at high and low spindle speeds, an extraction method for the installation eccentricity is developed. The spindle built-in encoder acquisition technology and angle position resampling method are used to reduce the influence of cutting conditions on error separation. Finally, an actual cutting experiment is conducted to verify the effectiveness of the proposed method, and it is shown that the proposed method cannot only achieve rapid separation but also obtain better separation accuracy under cutting conditions.