A study on the Influence of Spindle Rotation Speed of Digimatic Outside Micrometer

Digimatic outside micrometer is the highly accurate measuring tool. However, the rotation speed of the spindle is one of the main factors to produce a measurement result with high quality. This paper presents the influence of spindle rotation speed on the measurement results. Therefore, a simple apparatus was constructed. DC-motor with encoder was connected to digimatic outside micrometer and used for controlling the rotation speed of spindle from 80 to 200 rpm. The experiment results revealed that the correction values produced by digimatic outside micrometer increased with the rotation speed of the spindle. However, we also found that the rotation speed of the spindle at 100 rpm produced the correction values are zero. These results indicated the proper rotation speed of the spindle during use for measuring a workpiece.