Feed level control system and method

A method for determining and controlling the level of milling material in a storage container for milling material of a grinding machine, preferably a roller mill, the storage container comprising at least one milling material inlet, at least one milling material outlet and at least one metering device for metering milling material into a milling gap of the grinding machine, preferably roller mill, through the milling material outlet, the method comprising the following steps:

• determining a first parameter, preferably a weight force, exerted by the milling material with a main sensor, preferably force sensor, provided at the storage container at a level;
• determining a milling material level in the storage container with an additional sensor, preferably level sensor, provided at the storage container such that the additional sensor extends into the storage container to a level that corresponds to the level where the main sensor is provided;
• optionally processing signals generated by the main sensor and the additional sensor;
• providing a setpoint value, preferably by an operator;
• and,
• generating, from the values derived from the main sensor and the additional sensor and from the setpoint value, an output signal to control the flow of the milling material out of the storage container.