The present invention relates to a machining device for machining workpieces. These workpieces can, purely by way of example, be workpieces made of wood, wood materials, plastic or the like. The machine tool comprises a machine bed (10) and a machining unit (20) which is movable along the machine bed (10) and in the housing (21) of which a machining assembly (25) is provided, and at least one sensor (30a, 30b, 30c, 30d; 40) attached to the housing (21) of the machining unit, said sensor being intended to monitor a travel movement of the machining unit (20), wherein an operating element (50a, 50b, 50c) is provided on the housing (21) of the movable machining unit in order to input an operating command, in particular a start or stop command, for the machining unit (20).