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

Claim 6:
7. 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 grinding step in which the grinding unit grinds the workpiece unit delivered to the chuck table in the loading step;
a second measuring step in which the second measuring unit measures a value of the thickness of the workpiece unit ground in the grinding step or a value to be used to calculate the value of the thickness of the workpiece unit ground in the grinding step;
a second unloading step in which the delivery mechanism delivers the workpiece unit whose value of the thickness has been measured in the second measuring step from the chuck table;
a third measuring step in which the first measuring unit measures a value of the thickness of the workpiece unit delivered from the chuck table in the second unloading step or a value to be used to calculate the value of the thickness of the workpiece unit delivered from the chuck table in the second unloading step; 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 third measuring step with each other.