| 摘要 |
A core-drilling device ( 10 ) comprising a drilling machine ( 3 ) with a core drill ( 4 ), a drill stand ( 2 ), a feeding housing suspending the drilling machine and which is movable along the stand, an electric drilling motor for rotation of the core drill in the drilling machine and a feeding unit ( 19 ) with an electric feeding motor ( 17 ) for the feeding of the feeding housing along the stand. A control unit ( 30 ), which is electrically connected to the feeding unit, comprises at least a first control ( 33 ) for manual influence of the feeding motor's ( 17 ) feeding force. |
