Dry Goods! Causes and Countermeasures of Common Faults in Components of Electronic Belt Scales

With the development and progress of science and technology, electronic technology is constantly being updated, and industrial automation is also continuously advancing. As an electronic dynamic scale, electronic belt scales are widely used in the bulk material handling processes of numerous industrial fields.

They play a crucial role in dynamic measurement of industrial bulk materials, industrial production process control and optimization, enterprise cost accounting, and settlement trade. Regardless of the application, there are certain requirements for the measurement accuracy and stability of electronic belt scales.

Therefore, various measures must be adopted to maintain the accuracy and stability of belt scales during application. Accurate fault diagnosis and rapid troubleshooting and resolution play a crucial and positive role in maintaining the accuracy and stability of electronic belt scales.

During the practical application of belt scales, understanding some common faults and mastering corresponding handling methods can promptly identify and resolve equipment hazards and faults, thereby improving the measurement accuracy and stability of belt scales.

An electronic belt scale is mainly composed of several components, including a weight sensor, speed sensor, scale frame, and instrument. Each component may experience different faults. The causes and countermeasures for common faults in each component include:

1. Common Faults and Countermeasures of the Scale Frame

   The scale frame of an electronic belt scale often encounters the following three types of faults:

   (1) Unstable flow rate values are frequently displayed during the operation of the electronic belt scale. Generally, when inspecting the scale frame, the fault may be detected. It could be due to the weighing idler stopping or operating intermittently due to the accumulation of a large amount of material or dust around it. In this case, simply clean up the accumulated material and dust near the weighing idler, and then check if the idler is deformed or worn. If replacement is not necessary, ensure its smooth operation.

   (2) Zero position fluctuations of the electronic belt scale when empty. This is caused by the deformation of the support spring plate of the scale frame. Simply replace the deformed spring plate.

   (3) Irregular changes in the flow rate displayed by the instrument. During routine inspection, if a multimeter measurement reveals fluctuations in the output signal of the weight sensor and the scale frame can also shake, simply re-tighten the loose fasteners.

2. Common Faults of the Weight Sensor

   During the operation of an electronic belt scale, if the instantaneous flow rate is excessively high, it may be due to an excessively large AD value set in the instrument data.

Simply readjust the instrument AD value. If the resistance value of the weight sensor exceeds the specified value, it indicates overloading. Adjust the material flow. If the flow rate at the production site cannot be changed, consider replacing the sensor.

If the instantaneous flow rate of the electronic belt scale fluctuates within a certain range during application, check for a broken signal cable of the weight sensor and reconnect it.

3. Instrument Does Not Display Belt Speed Parameters

   This situation may be caused by four factors:

   (1) The shaft connecting the speed sensor is disengaged. Whether it is the external or internal screws of the speed sensor, if they become loose, the belt speed will no longer be displayed.

   (2) There is a soldering issue in the circuit inside the aviation connector of the speed sensor.

   (3) The external connection circuit of the speed sensor has problems due to aging, or the internal circuit has wear and tear due to scratching, resulting in a short circuit fault.

   (4) The grating disc inside the speed sensor is worn out after long-term use.

In response to the above situations, maintenance personnel should handle them according to the actual situation. If it is loose or disengaged, re-tighten it properly. If there is a soldering issue, inspect each soldering point inside the aviation connector of the sensor one by one, find the location of the soldering issue, and resolder it. If the external wire of the sensor is aged, reconnect it with a new wire. If the grating disc is worn out, replace it.