A stabilised machine that comprises; - a self-propelled base frame movably supported by a motorised ground support arrangement and provided with an upper support plane; - a motorised turntable supported on top of the support plane of the base frame and rotatable with respect to an axis of rotation orthogonal to the support plane; - an elevating arm, one first end of which is articulated to the turntable and one second opposed free end of which is adapted to be fixed to an operating arrangement; - a plurality of stabilisers each of which is rotatably associated with the base frame about an axis of oscillation lying on a plane orthogonal to the axis of rotation of the turntable, alternatively between a working position, in which it is supported on the ground in addition to or as an alternative to the group support arrangement, and a rest position, in which it is raised off the ground; - a control system comprising a plurality of sensors, one for each of the stabilisers, wherein each sensor is configured to detect a first parameter indicative of an inclination of the respective stabiliser about its axis of rotation, and an electronic control unit operatively coupled to the plurality of sensors; characterized in that the electronic control unit is configured to: - measure a value of said first parameter indicative of each stabiliser, when the relative stabiliser is stationary in a working position; and - control at least one operational parameter chosen from the set among: elevating arm extension stroke, elevating arm articulation arc, elevating arm rotation arc and combinations thereof, based on the measured values of the first indicative parameter. - a self-propelled base frame movably supported by a motorised ground support arrangement and provided with an upper support plane; - a motorised turntable supported on top of the support plane of the base frame and rotatable with respect to an axis of rotation orthogonal to the support plane; - an elevating arm, one first end of which is articulated to the turntable and one second opposed free end of which is adapted to be fixed to an operating arrangement; - a plurality of stabilisers each of which is rotatably associated with the base frame about an axis of oscillation lying on a plane orthogonal to the axis of rotation of the turntable, alternatively between a working position, in which it is supported on the ground in addition to or as an alternative to the group support arrangement, and a rest position, in which it is raised off the ground; - a control system comprising a plurality of sensors, one for each of the stabilisers, wherein each sensor is configured to detect a first parameter indicative of an inclination of the respective stabiliser about its axis of rotation, and an electronic control unit operatively coupled to the plurality of sensors; - measure a value of said first parameter indicative of each stabiliser, when the relative stabiliser is stationary in a working position; and - control at least one operational parameter chosen from the set among: elevating arm extension stroke, elevating arm articulation arc, elevating arm rotation arc and combinations thereof, based on the measured values of the first indicative parameter.