| 摘要 |
PURPOSE:To improve operation, working efficiency, and processing accuracy of the captioned core drill by changing a zero-position so as to make any drilling operation possible on the basis of a single data. CONSTITUTION:For a core drill for shape steel to automatically drilling specified tack holes, a left side zero-return, a right side zero-return, center zero-return, automatic start, and the data from the data-key board 11b' of a data key switch 11b are input into a microcomputer 10, and the required data are, by each operation, commanded and transmitted to a display 11c and an external apparatus 20 (an operating mechanism of drill unit). Also, a sensing device 21 detecting the position of drill unit and an encoder 22 detecting the movements of drill unit are engaged with a microcomputer 10. And various controlling operations are performed through engagement of a control device 10'. Thus, improvement of working efficiency and processing accuracy can be achieved. |
