Abstract: The invention relates to a ground surface cutting device comprising: a cutting motor for rotationally driving a cutting tool; an advancing device for displacing the cutting tool with an advancing speed relative to the ground surface, and; a rotationally speed measuring device for measuring an actual value for the rotational speed of the cutting tool or of the cutting motor. The actual value is evaluated by a control device and is compared with a predetermined set value. The control device controls the advancing device and changes the advancing speed based on a variation of the actual value from the set value.

Abstract: The invention relates to a cutting device that is provided with a traveling mechanism and a cutting disc that can be rotatably driven by a drive unit. The drive unit and the cutting disc are arranged on a support frame. An undercarriage is movably fixed to the support frame. A relative position can be adjusted between the undercarriage and the support frame by means of an adjustment device. The adjustment device is provided with a coarse adjustment device for adjusting at least two discrete relative positions and a fine adjustment device, which overlaps the effect of the coarse adjustment device in at least one of the discrete relative positions. The fine adjustment device is used for adjusting any relative position in a determined area.