How to improve the reliability and accuracy of weightlessness scale1
Weightlessness scale is a high-precision quantitative batching device, often used in small flow production workshops, generally used in batching systems less than 500kg/h, and the appearance of constant scales has slowly replaced belt scales, spiral scales, etc. In comparison, the weightlessness scale has the characteristics of high control accuracy, fully sealed design, simple verification, and good stability. But to make the weightlessness scale better serve production, it needs to be improved in details, that is, how the weightlessness scale can improve the reliability of measurement and the accuracy of control. The weightlessness scale improves the reliability of measurement and the accuracy of control mainly from the following aspects. The weightlessness scale appropriately selects the range of the load cell. In some cases, the feeding amount of the weightlessness scale is very small, such as 50kg/h. At this time, the sensor needs to have a higher sensitivity. If the sensor range is too large, the sensor is not sensitive to changes in weight. It is inevitable that there will be errors or even the display of zero flow. Try to stay away from the place where there is a vibration source. The impact of the vibration weight is self-evident, especially the irregular vibration source, so if possible, install the weightlessness scale away from the vibration source. In the feeding process, it is often necessary to adjust the feeding amount and the adjustment is relatively large. Two-way PID control should be adopted. One PID is used for coarse adjustment to make the feeding amount quickly reach the set value, and then the other PID is fine-tuned to make The feed rate is stable near the set value. The scale body should be cleaned frequently to prevent dust accumulation from causing changes in the zero point of the weightless scale. The company's self-developed automatic checkweigher machine, sorting scale, checkweigher machine, automatic sorting scale, and weight sorting scale have solved the thorny problems of product production and packaging for a large number of enterprises in our country, and improved product quality assurance. The brand image of the company.
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