Quantitative packaging machine is an automated machinery used for precise weighing, filling, and sealing of bulk materials. With the development of electronic technology, the methods of measurement and feeding are also constantly evolving, and the accuracy is also constantly improving. For example, the earliest models were still measured by volume or mechanical scales, while current measurements are controlled and displayed by electronic weighing sensors and electronic weighing control instruments.

The principle of a quantitative packaging machine is to use an electronic weighing control instrument as the "brain" to set the target weight, and then control the feeding device to perform fast, medium, and slow feeding to achieve precise quantitative feeding. To achieve precise quantification, it is necessary to have a good "brain", a good weighing sensor, and a reasonable mechanism. Without a reasonable structure, good sensors and brain cannot play a role. 

Finally, it is necessary to select the appropriate feeder based on the material and determine the size and speed of the feeder. In summary, precise weighing requires a combination of electronics, machinery, and correct operation, and involves many aspects. Improving accuracy requires optimizing and improving from multiple aspects.