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What factors affect the accuracy of checkweighers

(1) Internal factors of the tested items

1. The characteristics of the tested items are liquid, solid and powder. When the liquid articles enter the weighing platform, because the weighing platform conveyor belt is moving, the shaking of the liquid inside will cause the center of gravity of the article to change;

When solid objects enter the weighing platform of an automatic checkweigher , the object generates large vibrations and lasts a long time. The system must enable secondary filtering to resist vibration; when powder items enter the weighing platform, the powder inside the package may also move. Will cause changes in the center of gravity of the item.

2. The packaging of the tested items is bagged, canned, and bottled. The size of the official service between the same packaging, the bottom of cans and bottles is uneven, and the diameter of the bottom is

And the size of the height will affect the vibration generated when the measured item enters the weighing platform.

3. The raw materials of the tested items, transparent items and reflective items will affect the photoelectric switch's induction; however, we can use the non-optical weight recognition mode to check the weight to prevent this trouble.

4, the weight of the item to be measured, the heavier the item, the lower the accuracy.

5. The speed of the item to be tested, the faster the belt speed, the shorter the system read time, the greater the impact on accuracy; the number of items detected per minute will also affect the accuracy.

6. The shape of the tested object, the bottom surface of the irregular-shaped object is uneven, and the vibration entering the weighing platform has a large impact on the accuracy.

(B) the use of environmental factors

1. Temperature and humidity of the use environment;

2. The ground vibration and airflow, the proximity of the machine with large vibration, and the fan airflow and air conditioning airflow should not be equipped with automatic checkweighers;

3. Static and electromagnetic disturbance, the equipment should be grounded, and it should be separated from high-power equipment and power supply system;

4. Protective measures should be taken in places with large dust and corrosive liquid.

(Three) human factors

1. Improper parameter setting during use;

2. The space between the speed increasing section, the weighing section and the removing section is too large or too small;

3. The weighing platform is not level;

4. The conveyor belt is too loose or too tight;

5. The motor and sensor wires are not tied well;

6, sensor overload damage;

7. The reflector of the photoelectric switch was not cleaned in time.


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