MOBILE MACHINE TOOL WITH SUCTION UNIT AND CONTROL METHOD

The invention relates to a mobile machine tool for machining a workpiece or a space (RA), having a work device (50) which is mobile with respect to a surface (FL, FR, FF, FD) of the workpiece or space(RA) and which has a tool holder (58), which is or can be driven by a drive motor (53), for a work tool (90A, 90F), more particularly for the abrasive machining of the surface (FL, FR, FF, FD), and/or a coating unit (980) having a coating tool (981) for coating the surface (FL, FR, FF, FD), wherein the work device (50) has a suction unit (70) for suctioning the work device (50) onto the surface with at least one force component oriented in a normal direction (N) of the surface, wherein the suction unit (70) has at least one valve (85) for controlling a suction air flow and/or a vacuum in a suction region of the work device (50) for suctioning onto the surface, and wherein the at least one valve (85) has a valve member (86), which can be moved between at least two valve positions in whicha flow cross-section of th