How to ensure the accuracy of automatic checkweigher, what are the basic methods and requirements?
The checkweigher machine manufacturer will introduce to you the basic methods and requirements of how to ensure the accuracy of automatic checkweighers: (1) Ensure the accuracy by ensuring the passing state of the tested products. Due to the wide variety of detection products, the state of the measured object through the automatic weighing part has a great influence on the accuracy of the weighing instrument. Before a batch of detected objects passes through the weighing scale, there must be an equidistant separation procedure, and the interval must be large enough to a certain value. It is necessary to ensure that after the previous product leaves the weighing table, the next product can touch the weighing table, that is, to ensure that only one measured object enters the weighing table at a time. This method can increase the conveying speed of the checkweigher, make the forwarding equipment produce a speed difference, increase the distance between the products to a certain extent, and ensure the weighing requirements of the checkweigher. The stability of the product to be tested on the weight table is also an important factor affecting the accuracy. When the inspected product enters the weighing section through the introduction conveyor, a smooth transition should be ensured. First, the speed of the lead-in conveyor and the speed of the weighing conveyor are adjusted to the same level, and the speed difference is minimized to ensure a smooth transition of the product under inspection as it passes through the engagement position. In addition, due to the diversity of the shape of the detected object, if the height of the heavy table is too high or the area of u200bu200bthe bottom contact table is too small, when passing through the joint position, there will be tilting, jumping, etc., causing the table to vibrate. In this case, transition devices, such as transition slides, ball transition plates, etc., can be added at the junction of the conveyor belts. At the same time, another important factor that affects the accuracy of the checkweigher is the conveying speed of the product being tested. In terms of production operations, in order to improve production efficiency, it is always desirable to increase the speed of the production line as much as possible. However, checkweigher machine manufacturers believe that for automatic checkweighers, the contradiction between speed and accuracy always exists, and the faster the speed, the harder it is to guarantee the accuracy. The residence time (weighing time) of the inspection product in the checkweigher machine should reach a certain length, and this time should meet the requirements of the instrument control system for the number of sampling points of the load cell signal. Because the sampling time is too short and the sampling points are too few, the arithmetic mean cannot be calculated by the instrument control system, and the weighing result cannot be obtained.
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