| 摘要 |
<p>An arrangement for controlling the feed motion of the feed beam (1) of a rock drill, said arrangement comprising sensing elements for detecting the position of the front and the rear end of the rock drill (2) and for controlling the feed and the return motion. In the arrangement of the invention, inductive sensors are mounted in the middle of the feed beam (1), and indicators (12, 13) are secured to the cylinder sleeve (5) of the feed cylinder (3) so that the position of the cylinder sleeve (5) indicates the position of the front and the rear end of the drill (2) and thus controls the feed motion of the drill (2).</p> |
