Automatic filling scale production line set control plastic drum disinfection, bottle delivery, quantitative filling, cap and cap rolling and other functions in one, controlled by the frequency converter continuous rotation operation of the large plate using barrel positioning technology to achieve the feed of the control drum, the whole circumference of the rotating plate is evenly divided into multiple groups, each group has multiple barrels to be filled at the same time, when the filling signal arrives, Multiple filling needles are controlled by the CAM mechanism that operates in coordination with the rotating plate to drop to a certain depth in several drums, and simultaneously run and fill with the rotating plate. After quantitative filling is completed, multiple filling needles are lifted from the CAM mechanism to completely leave the filling bucket and quickly swing back to the initial position, waiting for the next set of empty drums to be filled. The filled barrel is transported to the capping link for processing, so that the Filling system completes a cycle.

The motion controller of digital signal processor DSP of the Filling machine, combined with Yaskawa AC servo unit and servo motor, formed a servo control system with strong adaptability and flexibility to replace the CAM feed and give fast swing function. In order to reduce the drive power requirements of the system, reduce engineering costs and ensure that the system can drive the load for rapid acceleration/deceleration movement, the load transmission link adopts the synchronous gear belt deceleration transmission device through the walking wheel. The synchronous gear belt deceleration device has the elastic and damping characteristics, which not only has the isolation effect on vibration, but also reduces the moment of inertia of the load converted to the motor. But it increases the order of load transmission link and increases the difficulty of control.

The position tracking performance of quantitative filling machine and its ability to suppress periodic interference signal are the prerequisite for vertical filling. Due to the needs of production efficiency and filling quality, the filling system runs faster and faster, the higher the horizontal position tracking accuracy, and the smaller the diameter of the barrel to be canned, the higher the tracking accuracy of the system. Aiming at the actual situation that the horizontal position tracking system of automatic filling machine requires simple control algorithm, good real-time and high precision, a combination of PID control and improved double repeat control is proposed, and a compound control strategy based on double repeat control and PID control is formed by using their respective advantages. PD(proportion, differentiation) is introduced in each repeat controller channel.