Reduction of Run-out and Vibration of High Speed Spindle for Machining Centers (2nd Report)

—Problem of a Three-plane Balancing Method and Effectiveness of a Four-plane Balancing Method—

Abstract

It is important to reduce the run-out and vibration, at the same time, of the spindle for high speed machining centers due to the unbalance mass in order to get high machining performance. We have confirmed the effectiveness and the problem of a three-plane balancing method for flexible rotor in the previous report. In this paper, we have discussed the effectiveness of a four-plane balancing method. In the experiment, the run-out and vibration of spindle are measured with two displacement sensors and two accelerometers at the spindle nose and end. We have confirmed that after reducing the vibration of the spindle by means of a field balancer at high speed the run-out can be reduced by calculating the force balance.