| 摘要 |
PURPOSE:To improve drilling operation, working efficiency, and processing accuracy by making up the conditions allowing drilling holes in all positions on the basis of single data by performing a zero-return exactly and in a short time, and by alternating zero position in accordance with the drilling positions. CONSTITUTION:In a position-control method for a shape steel-core drill automatically drilling the specified tack holes, when a left side zero-return button is depressed to actuate START, a target value wherein drill units 7, 8 travel to the specified first hole-position, is determined by a positioning loop, and automatic positioning is achieved to perform, specified drilling. Next, after depressing the right side zero-return button, the right side drilling is performed by automatically positioning units 7, 8 to the right side zero-position. And the data read out from the microcomputer 10 is allowed to be single and the travelling directions of units 7, 8 are merely different from each other. Thus, the improvement of drilling operation, working efficiency, and processing accuracy can be achieved. |
