| 摘要 |
The measuring device (1) incorporated to the side opposite the chuck (13) of the workpiece (3) to be machined, uses an optical length measurement apparatus (4, 5) whose scale (4) is supported by a movable member (6, 9) which includes a shaft (6) to thrust the workpiece (3) itself impelled by a shank (10') of a piston-rod (10). The shaft (6) impelling the workpiece (3) with its feeler head (11), makes controlled pressure contact with the end (3a) of the workpiece and the signal emitted by the feeder head (5) of the apparatus represents the workpiece reference position (2), and is transmitted to the lathe controller (7) to define the positioning of the tool-holder turret (8) for the the start of machining. <IMAGE>
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