On the Operating Regulations of Weightless Scale and Its Solving Function
Throughout the application process, the weightlessness scale mainly conducts continuous and accurate measurement and verification of raw materials based on the changes in the net weight of the raw materials on the scale. Its appearance will gradually replace the original electronic belt scale, spiral scale and even accumulation scale. As a measurement verification method, it has been widely used in the fields of metallurgy, mining, chemical plants and chemical fiber energy. Operations and solutions in mechanical equipment are executed by it. The control instrument will calculate the net weight elastic coefficient per unit time of the scale according to its data signal as the specific instantaneous total flow, and then compare it with the set total target total flow. After PID calculation, a 4-50mA current data signal will be output to change the output frequency of the feed motor soft starter. In this way, the speed ratio of the motor can be changed to make the specific load as close as possible to the set overall target total flow, so as to achieve the purpose of accurate loading. If the weightless scale performs PID control based on the data signal from its sensor, the net weight change sensed by the sensor will be reduced within this time range, and then the data signal frame dropping operation is prohibited. Therefore, the replenishment is also set in the control instrument The timing time is recorded when the gate valve is closed. During the period when the expected feed time of the feed motor is completed, that is, the weightless scale runs at a fixed frequency during the whole process, and the static data manipulation will keep the frequency before the feed unchanged. There are many key reasons that endanger the accuracy of mechanical equipment during operation, such as gas fluidity, such as cooling fans in the production workshop, central air conditioning, and breeze blowing. , It will endanger the accuracy of the automatic weighing instrument, and the road surface will vibrate, because the production workshop is noisy and the equipment often runs, and even the uneven road surface in some production workshops will also endanger the accuracy of the automatic weighing instrument.