a Measuring Method for Spindle Runout-Error using Magneto-Resistance Device

Abstract

A newly measuring instrument for spindle Runout–Error is presented in this report. This instrument consists of magneto–resistance device, a ridge–circuit and an amplifier. This measuring method is non–contact type. The magneto–resistance device is very sensitive; it is able to detect a magnetism object accurately. The sensitivity of the direction in a parallel to the sensor is better than the vertical direction. According to the experimental results, this newly instrument can measure the rotation accuracy of the spindle easily and inexpensively. And the resolution of the instrument is approximately 0.05µm.