1. A hay harvesting machine, in particular a swather for laying mowed grass in rolls, comprising a supporting structure including a main beam (1), to which at least one side bar (2) is pivotally connected with at least at least one rotor-swather (5), while the rotor (5) is connected to a supporting device (12), forming a means of interaction with the holder (9) mounted on the specified side rod (2), while the supporting device (12) allows rotor (5) to move to follow the irregularities of the earth, to where the machine operates and is in the working position, characterized in that the supporting device (12) comprises a control system configured to limit the movements of the rotor (5) in the working position and lock them in other positions, while the control system is configured to limit the movement of the rotor (5), includes a drive means containing at least one hydraulic actuator (13, 13a, 13b), and a connecting device moved by the specified at least one hydraulic power cylinder (13, 13a, 13b) .2. A hay harvesting machine according to claim 1, characterized in that said at least one hydraulic ram (13, 13a, 13b) is connected on one side to the rotor (5) by means of a connecting device and on the other side to a holder (9). 3. A haymaking machine according to claim 1, characterized in that the supporting device (12) comprises a first axis (10) oriented in the direction of travel (A). A haymaking machine according to claim 1, characterized in that the supporting device (12) comprises a second axis (11) perpendicular to the direction of travel (A). Sep�1. Сеноуборочная машина, в частности валкоукладчик для укладки скошенных трав в валки, содержащая несущую конструкцию, включающую в себя главную балку (1), с которой шарнирно соединена, по меньшей мере, одна боковая штанга (2) с установленным на ней, по меньшей мере, одним ротором-валкоукладчиком (5), при этом ротор (5) соединен с несущим устройством (12), образующим средство взаимодействия с держателем (9), установлен
