摘要:
Among machining commands, symbols denoting moving directions, and movement data held in correspondence with data numbers are separately stored in a command area (101) and a data area (102), so that when a predetermined machining command, including a data number, has been read out from the command area, the movement data is read out of a memory location corresponding to the data number of this machining command, so as to successively perform predetermined numerical control processing.
摘要:
A method and apparatus for controlling the return of a movable element of a machine tool to a predetermined grid point by controlling a movable element drive device in accordance with feedback pulses generated while the drive device is being driven to transport the movable element between grid points. The method includes the steps of specifying a position remote from the predetermined grid point by a distance which is less than the spacing between grid points, computing the deviation between the specified position and the current position of the movable element, positioning the movable element at the specified position by driving the drive device on the basis of the computed deviation and the feedback pulses, and driving the drive device at reduced speed to stop the movable element at the first grid point encountered following the initiation of reduced-speed drive.