Method for controlling a device for changing the spreading ring sector of a disc spreader including a controllable metering device, a distributor disc arranged underneath the metering device and provided with thrower blades, and the device for changing the spreading ring sector of the granular material on the ground. Functional dependencies of a setting parameter of the device for changing the spreading ring sector on a throwing parameter are stored in a database of a control unit assigned to the device for adjusting the spreading ring sector, and a set point value of the throwing parameter or of the setting parameter corresponding thereto is input in the control unit. An actual value of the throwing parameter is determined using a sensor, arranged near to the circumference of the distributor disc, and the actual value of the throwing parameter is compared with the set point value thereof in the control unit.
