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Automatic quantitative packaging scale applied to industrial and agricultural automated production of automatic quantitative packaging, the entire weighing process controlled by the computer, automatically completed. It has the advantages of high weighing speed, high weighing accuracy, labor saving, provincial people, simple operation and convenient maintenance.
Weighing debugging method After checking the sensor wiring is correct, open the control cabinet power and warm up for 15 minutes before debugging. In this paper, the technical requirements for the maximum capacity of 100kg, the division value of 0.2kg, the quantitative value of 90kg, and the accuracy level of satisfying X(0.2) are taken as examples.
(1) Partial load adjustment The 10kg weight is placed on the two weighing points of the weighing bucket. When the weighing display shows "positive difference", the sensor output should be adjusted to reduce direction; when the weighing display shows "negative difference," the sensor output should be adjusted to increase direction. For example: When the output of the L/C-1 sensor decreases, a set of trimming resistors (original 10 ohms) associated with L/C-1 will be rotated to the left with the same amount of rotation.
Turn right (clockwise) to decrease the resistance and increase the displayed value (marked as "plus");
Rotation to the left (counterclockwise) increases the resistance value and the displayed value decreases (denoted as "minus").
Note: When rotating the trimmer resistor, if the rotation of each group is inconsistent, the adjustment becomes difficult. Therefore, the rotation amount of each set of trimming resistors of the sensor during adjustment should be as uniform as possible. The absolute value of each bearing error is not more than 10g as qualified.
(2) Weighing adjustment Weighing adjustments are performed in accordance with the procedures for the calibration of the weighing display controller manual. From the zero point to the maximum point, the weight is incremented in the order of 0kg, 40kg, 70kg, 90kg, and 100kg. The error is not greater than 10g, 20g, 35g, 45g, 50g, respectively; Weights are reduced in the order of 100kg, 90kg, 70kg, 40kg, and 0kg. The error is not greater than their respective tolerances. Repeatability tests are performed at 40kg and 100kg points. Each weighing point is performed 3 times. Each error is not greater than Tolerance.
(3) Parameter setting There are many parameters to be set in the quantitative packing scale. The following uses common key parameters as an example to introduce the following:
a, Weighing display controller quantitative value can be set to quantitative target value, such as 90kg.
b, quickly increase the amount of advance, slow increase in advance.
When the weight> (set value)-(fast increase in advance), stop fast increase, turn slow increase;
When the weight> (set value) - (slow increase advance), stop feeding.