GRADE MECHANISM FOR TILTABLE LASER OPTICAL SYSTEMS

摘要

Rotating construction laser device (28) with a grade mechanism (1), comprising a lens barrel (21) with a laser optical system (20), a grade arm (2), which is tiltably supported on a frame structure (8) in an XZ-plane, a tilt 5 sensor (10) which is provided at the grade arm (2) and is configured to detect a level position of the grade arm (2), a tilting mechanism (22), which is provided on the frame structure (8) and is designed to tilt the grade arm (2) relative to the XZ-plane, a code element (12', 12'') and a 10 position detection device for providing and detecting a feedback position information, and a levelling mechanism (23), which supports the lens barrel (21) tiltably and is designed to tilt the lens barrel (21) in order to have the level position detected by the tilt 15 sensor (10) and therewith to level the grade arm (2), characterised in that the code element (12', 12'') or the position detection device is arranged directly on the grade arm (2), and the feedback position information directly depends on the position of a reference point on the grade 20 arm (2), the reference point being defined by the code element (12', 12'') or the position detection device, respectively, thus allowing to deduce a position of the grade arm (2) directly from the feedback position information, and/or to calculate a tilting angle (ß, ß1) of 25 the grade arm (2) with respect to the lens barrel (21) directly from the feedback position information.