| 摘要 |
PROBLEM TO BE SOLVED: To perform machining efficiently and achieve high precision machining. SOLUTION: An upper face of a workpiece W on a table 20 is ground by a rotary grinding wheel 17. A vice 44 for installing a dummy workpiece is provided on the table 20. A main spindle head 15 is provided with measuring equipment 30 to measure an upper face position of the dummy workpiece. The upper face position of the dummy workpiece is measured, and a grinding amount for the dummy workpiece is set using a height of the dummy workpiece as a reference. Grinding of the dummy workpiece is performed to obtain the set cut-in amount. Upon completion of grinding, an upper face of the dummy workpiece is measured, and a grinding amount is calculated. A change rate of actual grinding amount for the set grinding amount is obtained. A grinding amount of the workpiece W is determined using the change rate to perform grinding.
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