The weighing range of the computer combination scale is larger than that of the automatic quantitative packaging scale.

The quantitative automatic packaging scale weighs while feeding, and continues to feed before reaching the target weight data. When there is a slight difference from the target weight, an object to be weighed must be added, that is, the rough measurement is performed before the fine measurement is performed. When it is large or heavy, there is a large error, which affects the accuracy of its weighing. The computer combination scale is composed of multiple weighing units with independent feeding and discharging structures. Generally, the computer combination scale is composed of 8 to 32 weighing units. The computer uses the principle of permutation and combination to automatically optimize the combination calculation of the load of each weighing unit, and obtain the best combination that is close to the quantitative value for packaging.

For example, a computer combination scale with ten weighing units, each weighing unit is weighed during weighing, and the weight data of each weighing bucket is read into the computer, and the computer performs the optimal combination, according to the combination mathematics , the ten weighing units can achieve a total of 1023 combinations, and the computer selects the combination that is close to the target weight value from the 1023 combinations. In this way, the single weight of the object to be weighed during the above-mentioned precise measurement weighing is large, and the work that is difficult to achieve quantitative value is easily solved. Computerized combination scales result in combinations that are close to the target weight.

This kind of error is a very obvious error for quantitative automatic packaging scales. When the weight value in the weighing hopper reaches the set value, although the electromagnetic vibrating feeder has stopped, the moment it stops, the distance between the weighing hopper and the vibrator The existence of a section of the object to be weighed will fall into the bucket to produce the so-called drop error. Although some quantitative automatic packaging scales reduce the drop error by shortening the feeding time, due to the influence of system uncertainties such as flow rate and feeding uniformity , there are still different degrees of error. The computer combination scale is fed from the buffer hopper to the weighing hopper. After the weighing hopper is completely stable, an instruction is issued to request for weighing, so there is no drop error.

In the case of the same degree of accuracy, the weighing range of the computer combination scale is larger than that of the quantitative automatic packaging scale. Generally, the weighing range of the quantitative automatic packaging scale is controlled within 4 times under the same degree of accuracy, while the computer combination scale has a small weighing range. The weighing range of the segment can reach ten times. It can also be seen from a large number of test results that there is a difference in the weighing range between the two.

For example, within the weighing range of more than ten grams to 1 kilogram, the computer combination scale can meet the requirements of the X (1) level of accuracy, especially in the small weighing section. If you want to keep the accuracy level unchanged, the quantitative automatic packaging scale can only reduce the weighing range and form a multi-stage weighing. General manufacturers will hardly accept this phenomenon. This brings limitations in practical applications, and cannot meet the requirements of different packaging specifications (10-1000g) in some production fields but require similar accuracy.