| 摘要 |
PCT No. PCT/FI94/00404 Sec. 371 Date Mar. 18, 1996 Sec. 102(e) Date Mar. 18, 1996 PCT Filed Sep. 14, 1994 PCT Pub. No. WO95/08693 PCT Pub. Date Mar. 30, 1995An arrangement for controlling the feed motion of the feed beam of a rock drill, the arrangement including sensing elements for detecting the position of the front and for rear end of the rock drill 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, and indicators are secured to the cylinder sleeve of the feed cylinder so that the position of the cylinder sleeve indicates the position of the front and the rear end of the drill and thus controls the feed motion of the drill.
|
