Apparatus for cutting grass

An apparatus for cutting grass comprising: a lawn mower equipped with movement means (20) and one or more blades (30) for cutting grass; a perimeter cable (2), delimiting a cutting area (S); a management device (3) for generating an electrical signal (ES) in the cable (2); a recharging base (80). The lawn mower (1) further comprises a control unit (60) equipped with: sensor means (40) to detect the electrical signal (ES); a memory (61) to store a maximum value (Vmax) and a minimum value (Vmin); a calculation module (62) to determine, for said intensity of detection, a target value (Tv) that is non-null and comprised between the maximum (Vmax) and minimum value (Vmin), the target value (Tv) being different from a preceding target value; an operative module (63) to command the movement means (20) so as to move the lawn mower (1) in such a manner that the sensor means (40) detects the electrical signal (ES) at an intensity equal to the target value (Tv).