Patent ID: 8069756

Claim:
An apparatus for automatically detecting a position of a cutting tool in a computerized numerically controlled lathe, the apparatus comprising: a touch sensor for sensing the position of the cutting tool in the computerized numerically controlled lathe; an arm for moving the touch sensor to a predetermined position for sensing the position of the cutting tool, the arm being provided with a sensing dog, which protrudes from one side surface of the arm at a predetermined length; a gear assembly for pivoting the arm in a range of predetermined rotational angles, the gear assembly being combined to the arm; a driving motor for supplying the gear assembly with a driving force; and a housing for accommodating the gear assembly and the driving motor, in which a bearing housing is fixedly mounted to one side of a main body of the housing, a stopper is fixedly mounted to an exposed surface of the bearing housing for restraining pivoting and defining a predetermined sensing position of the arm, and first and second sensors are installed at one surface of the housing for sensing, by means of said sensing dog, the access state of the arm during rotation of the arm.