Patent ID: 8200362

Claim:
A numerically controlling apparatus for controlling automatic operation of a machine tool, which comprises means for storing NC programs for controlling the operation of the machine tool, a programmable logic controller for controlling the maintenance operation of the machine tool and the operation of the machine tool and a control circuit for controlling the operation of the servomotor in the machine tool, and in which plurality of blocks constituting the NC programs are read out sequentially to be analyzed and then the action due to the command of the blocks is carried out, whereby the automatic operation of the machine tool is controlled, characterized in that: said numerically controlling apparatus is equipped with a program content display area for displaying the selected one of said NC programs in an image, stop point setting means for setting stop points and displaying determined marks indicating the stop points in the desired blocks of the NC program displayed in said program content display area, and stop point removing means for removing the stop points in the blocks for which the stop points are set; and further characterized in that, in automatic operation of the machine tool, the NC program, for which setting of the stop point has been completed, is read out so that the automatic operation of the machine tool is performed and the automatic operation of the machine tool is stopped when the action due to the command of the block, for which the stop points are set, has been completed.