Patent ID: 11858090
Assignee: DISCO CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. The method of driving the grinding apparatus according to claim 6, the grinding apparatus further including:
a second measuring unit for measuring a value of the thickness of the workpiece unit held on the chuck table or a value to be used to calculate the value of the thickness of the workpiece unit held on the chuck table,
the method further comprising:
a second measuring step in which the second measuring unit measures a value of the thickness of the workpiece unit before the workpiece unit delivered to the chuck table in the loading step is ground or a value to be used to calculate the value of the thickness of the workpiece unit before the workpiece unit delivered to the chuck table in the loading step is ground; and
a second deciding step in which the control unit decides whether the second measuring unit is operating normally or not by comparing the value of the thickness of the workpiece unit that is obtained from a result of the measurement performed in the second measuring step and the value of the thickness of the workpiece unit that is obtained from a result of the measurement performed in the first measuring step with each other.