Regarding to the filling machine .there are many filling ways and control ways .such as piston pump filling by penumatic .piston pump filling by servo motor .so here i make a brief explanation for the piston pump filling by servo motor .

Because the servo motor itself has the function of sending pulses, every time the servo motor rotates one angle, it will send out a corresponding number of pulses. In this way, it echoes the pulses received by the servo motor, or is called a closed loop. In this way, the system will know How many pulses are sent to the servo motor, and how many pulses are received at the same time, so that the rotation of the motor can be controlled very accurately, so as to achieve precise positioning, which can reach 0.001mm .that way it will filling very precisely .and you can control through the HMI .