How to improve the accuracy and stability of quantitative packaging scales

In order to improve the accuracy and stability of the quantitative packaging scale, many automatic control theories are added to the automatic weighing controller, which has automatic functions such as zero abnormal automatic alarm, out-of-tolerance automatic alarm, zero tracking and automatic zero drop correction.

The above functions have one thing in common, that is, the weight-related data is used as the measurement basis. There are mainly two monitoring data, one is the empty range value detected after unloading, and the other is the full range value detected after charging.

On the basis of this dynamic work, it is difficult for the staff to accurately measure the values of these two points. To this end, the traditional method is to first detect the zero value before the feeding operation, and then detect the full scale value after the feeding operation is completed, and then use it as the data basis for automatic control in turn. However, the scale of quantitative packaging is different.

This is a dynamic operation process. Relatively speaking, some weight-related data information changes from dynamic to static. Therefore, the detection work needs to be carried out in a relatively stable time. If the weight related data is found every time, the scale must be in a steady state, and then the static weight data is detected, which will prolong the work cycle time and reduce the work efficiency, so it is impossible to ensure accuracy and improve efficiency at the same time. It is worth noting that the value to be measured must be set correctly to ensure that the small material gate can meet the required weight after one time closing. Otherwise, after the small material door is closed once, if the weight is lower than the requirement, the small material door must be re-opened to replenish the material, resulting in an over-tolerance.

In addition, if the parameter changes are inappropriate and unreasonable, the feeding of small material gates will also occur. Therefore, its parameters must be adjusted before operation to ensure the accuracy of weighing and avoid out-of-tolerance. Only when the accuracy is guaranteed, can we talk about ways to improve the speed of work.