Road finishing machine and method for levelling a screed

A method for levelling a screed of a road finishing machine, the method comprising:

• calculating, using a controlling system of the road finishing machine, a correction value in response to at least one distance measurement of a measuring means performed with respect to a subsoil and/or to a reference, wherein the at least one distance measurement is performed at a measuring point located in front of a front edge of the screed in a laying direction;
• at least temporarily storing the correction value;
• calculating a desired levelling value for the measuring point with a continued laying operation, taking into consideration the stored correction value;
• and
• controlling at least one levelling cylinder of the screed, based on the desired levelling value, when the front edge of the screed reaches the measuring point.

A road finishing machine, comprising:

• a screed for producing a paving layer on a subsoil on which the road finishing machine is movable in a laying direction, wherein the screed is height-adjustable and has a pulling arm;
• a leveling cylinder that connects the pulling arm to a portion of the road finishing machine;
• at least one measuring sensor for performing at least one distance measurement, with respect to the subsoil and/or to a reference, at a measuring point located in front of a front edge of the screed in the laying direction;
• and
• a controlling system that is embodied to calculate a correction value based on the at least one distance measurement, at least temporarily store the correction value in a storage means and calculate a desired levelling value for the measuring point, taking into consideration the stored correction value, and wherein the levelling cylinder of the screed is controllable based on the desired levelling value when the front edge of the screed reaches the measuring point.