| 摘要 |
<p>A numerical control unit for automatically machining a workpiece on the basis of a machining program, comprises a memory unit (32) for storing data input/output to the NC unit (1), and an editing unit (40) for editing data stored in the memory unit (32) adapted to edit data pertaining to a future machining job while the unit is performing a present machining job. There is provided a storage area storing history data relating to a plurality of previously made corrections, the history data being correctable.</p> |
