APPARATUS, ROCK DRILLING RIG AND METHOD FOR ROCK DRILLING

摘要

Abstract of the disclosure The invention relates to an apparatus, rock drilling rig and method for rock drilling. The apparatus comprises a turn ing device (TD) for moving a drilling tool (8) around longi tudinal axis of the tool. The turning movement (T) is con trolled by means of an alternating turning system (ATS) so that direction of turning movement is continuously re versed to first and second turning directions. Turning an gle of the tool is restricted and a safety system (SS) is configured to monitor the operation and to ensure that a predetermined turning angle is not exceeded. (Figure 3)