Control program for the dosing system of dry bulk feed components

The development of intensive farming technologies is impossible without the introduction of modern technologies. The problem of compound feed production in the voiced aspect can be solved not only through the development of new machines and equipment, but also the introduction of modern control systems. The article presents an analysis of existing dispenser control systems. Based on the analysis of programs and control systems, it was revealed that almost all programs are designed to work in limited conditions, some of them do not take into account a number of factors affecting the accuracy of the material supply. Therefore, a control program for a twin-screw dispenser is proposed. When developing the management program, we started from the technological process of dosing. The possibility of controlling two augers was taken into account: first, a large auger (driven by an asynchronous electric motor) turns on and feeds the main part, then it turns off and the second small auger (driven by an asynchronous or stepper motor) turns on, which carries out the filling of the remaining part. In this case, signals about the amount of material supplied are transmitted from weighing sensors (strain gauges). The proposed control program for the twin-screw dispenser is developed for the TM241C24R PLC in the Structured Text (ST) programming language, one of the languages of the IEC61131-3 standard, in the EcoStruxure Machine Expert programming environment. The control is displayed on a liquid crystal display. The main screen displays basic information: the parameters of the electric motor, the recipe and the readings of the weighing sensors. The program allows you to control the operation of dispensers in several modes. In automatic mode, each dispenser supplies only one component. In manual control mode, the dispensers are started and stopped by the operator from the control panel. In this case, it is possible to set the rotation speed of the dispenser shaft. In the dosing mode with two augers, one component is dispensed with two augers. The proposed program will improve the accuracy of dosing in automatic mode.