GRINDER AND ITS CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a grinder and its control method with which a machining state of a work surface of a workpiece is highly accurately determined. SOLUTION: A control unit (control section) 5 obtains a detection value of grinding power by an electric motor 22 which drives to rotate a whetstone 1 when a predetermined time has elapsed since a reference time point as a rising level of the grinding power. The control unit 5 compares the detection value with a threshold, thereby determining the machining state of the work surface 3a of an inner ring material (workpiece) 3. COPYRIGHT: (C)2004,JPO&NCIPI