The filler scale measures the weight through an Electronic scale and then feeds the material into the bucket. This is achieved through an electronic scale and weighing instrument, featuring fixed value and ratio functions. It can be directly used for the process control of the production filling operation. Based on the input weight signal, it realizes weighing measurement, automatic control, data statistics and upload. According to the stored or set filling ratio, it conducts automatic weighing control of the materials. Before filling, the position detection device detects the arrival signal of the filling bucket. At this point, the conveyor belt stops, and the motor of the main shaft lifting mechanism takes the bucket to rotate the main shaft to the lower position, then the bucket clamping mechanism clamps the filling bucket and raises it to the upper position. The conveyor belt starts, and the filling bucket rotates the main shaft and is sent to the quality inspection table. When the main shaft lifting mechanism lowers the bucket, the bucket clamping mechanism releases the filling bucket and it is positioned. Then, a quality inspection is conducted and the input signal of the measured actual quality of the filling bucket is output. Next, the bucket clamping mechanism clamps the filling bucket, the main shaft rotating mechanism raises it to the upper position, and then it is sent to the conveyor belt. The device stops the conveyor belt transmission, the main shaft lifting mechanism lowers, the bucket clamping mechanism releases the filling bucket, and it is positioned. Then, the main shaft rotates and the conveyor belt starts, completing one quality inspection action for the filling bucket, and this process repeats. 

The filling scale automatically controls the feeding volume of the filling gun based on the filling ratio output by the PLC. The feeding process follows a sequence of discharging materials in descending order according to the proportion. The over-discharge amount during the automatic filling process is dynamically adjusted based on the difference between the given value and the actual value, ensuring the accuracy of the filling process to the greatest extent. The feeding and weighing technology of the filling gun adopts two-step material control, which means rapid control of 90% followed by slow control of 10%. The entire material control and filling process is controlled by PLC, and the control value for this process is compensated based on the difference between the final value of the previous control and the set value. Based on the characteristics of repeated filling volume of a certain material, this technology can use the past weighing error data to compensate for the estimation of future material volume in space, maintaining the error within the smallest fluctuation range. 

The analog input module in the quantitative weighing online controller receives the measured mass input signals of the barrels before filling and after filling, and converts them into digital signals to input to the PLC. The PLC then compares them with the mass input signals and automatically compensates the model for calculation, generating an output signal for correcting the filling error. It also outputs the real-time detected mass signal and the filling error output signal, which are displayed on the touch screen. At the same time, the online quality controller feeds back the filling error output signal to the Filling system for online quality filling of liquid products.