The automatic filling scale adopts AC servo system, speed and current loop PI proportional control, introduces PD link in each repeat controller channel to adjust the tracking performance of the system, integrates PID control and improves the control system of double repeat control, and the Filling system realizes rapid convergence of repeatability errors and effective suppression of interference signals. The input signal is provided by an optical encoder coaxially mounted with the rotary table of the conveying bottle to be filled, and the signal is processed by multistage filtering. In order to improve the production efficiency and filling quality, the improved double repeat controller and conventional PID control are applied to the horizontal tracking and rapid swing servo system of the automatic Filling machine, using their respective advantages to achieve high precision tracking of periodic signals and reduce repeatability errors effectively.

Automatic filling machine is a special equipment for automatic metering and filling of liquid products. It is mainly composed of automatic transmission system, Weighing system, machine vision addressing system, automatic charging port addressing system, non-drip automatic charging system, filling data query and management system, multi-reexhaust air system and other systems, which can be widely used in petrochemical, dyes, oils, coatings and other industries of liquid products fixed weight measurement and packaging, especially suitable for highly toxic, strong corrosive media fixed weight measurement Fill it. Only need to place the container at the input end of the transmission system, and the rest of the operating procedures (except opening and closing the cover) are automated. It can accurately complete the automatic filling and metering of various liquid media.

When the weighing filling machine is working, empty drums are placed at the input end, and the automatic transmission system inputs them to the metering station. After the automatic addressing of the drum mouth is completed, the charging system is driven by the xy two-axis stepper motor to the mouth of the drum, and then the action of the charging head is completed by the pneumatic execution system. The bottom filling machine fills nitrogen according to the time set by the software, and the drip-free bottom valve device is opened for filling. The automatic filling system completes the measurement filling according to the preset automatic filling program, records the filling data and prompts the filling weight by voice. Then the motor controlled by the inverter transfers the finished product barrel to the next station to stop, and the cover is closed manually, so that a measurement and packaging program is completed.