Function: It is equivalent to the “brain” of the servo control system, responsible for tasks such as logical operations, command sending, and signal processing of the entire system. Based on the target parameters such as filling volume, speed, and pressure input by the operator through the human - machine interface, as well as the actual operation data fed back by sensors, it conducts analysis and calculation, and then issues corresponding control commands to achieve precise control of actuators such as servo motors.
Example: Common controllers include Programmable Logic Controllers (PLC) and motion controllers. In a filling machine, the PLC can achieve various logical controls and sequential operations during the filling process by writing specific programs. For instance, it can start and stop each component in a set sequence and coordinate the work of different filling heads.
Function: It is mainly used to receive the control signals sent by the controller and convert them into power signals capable of driving the servo motor. At the same time, it monitors and feeds back the operating status of the servo motor. According to the requirements of the control signals, it can precisely control the rotational speed, position, and torque of the servo motor, enabling the servo motor to operate as expected. Thus, it achieves precise driving of the rotor pump, ensuring the filling accuracy and stability of the hand - washing paste.
Example: Servo drives from different brands and models have different performances and characteristics. For example, some high - performance servo drives can achieve rapid response and precise control, which are suitable for occasions with high requirements for filling speed and accuracy. While some economical servo drives are suitable for applications that are cost - sensitive and have relatively lower performance requirements.
Function: As an actuator of the servo control system, it converts electrical energy into mechanical energy to provide power for the rotor pump. It can precisely control the rotational speed and rotation angle according to the signals output by the servo drive, thereby achieving precise control of the filling volume of the hand - washing paste. Compared with ordinary motors, servo motors have higher precision, faster response speed, and better stability, meeting the high - precision filling requirements of the filling machine.
Example: In a hand - washing paste filling machine, a servo motor with an appropriate power and torque is usually selected according to the load characteristics of the rotor pump and the requirements of the filling process. For example, in cases where the filling speed is fast and the material viscosity is high, a servo motor with a larger power and stronger torque output capacity is required to ensure stable driving of the rotor pump and achieve efficient and accurate filling.
Function: It is used to monitor the operating status and relevant parameters of the filling machine in real - time, such as pressure, flow rate, position, etc., and feed this information back to the controller. The controller compares and analyzes the data fed back by the sensor with the set target values and adjusts the control strategy in a timely manner to ensure the accuracy and stability of the filling process. Sensors play the role of “eyes” in the servo control system, providing accurate real - time information for the system so that the system can make correct decisions.
Example: A pressure sensor can monitor the pressure changes of the hand - washing paste in the conveying pipeline. When the pressure is abnormal, it promptly feeds the signal back to the controller. The controller can adjust the rotational speed of the servo motor or other parameters to ensure the pressure returns to normal, avoiding filling quality problems or equipment damage caused by excessive or insufficient pressure. A flow sensor can measure the flow rate of the hand - washing paste in real - time to precisely control the filling volume.
Function: It is used in conjunction with the servo motor to detect information such as the actual position and speed of the servo motor and feed this information back to the servo drive or controller. Through the feedback device, the system can achieve closed - loop control, that is, compare the actual operating status with the set value and make adjustments according to the deviation, thereby improving the control accuracy and stability. Common feedback devices include encoders, resolvers, etc.
Example: An encoder can convert the rotation angle of the servo motor into a digital signal to accurately measure the rotation position and speed of the motor. Based on the signal fed back by the encoder, the controller can understand the operating status of the servo motor in real - time. When it is found that there is a deviation between the actual position or speed of the motor and the set value, it promptly issues adjustment commands to make the motor return to the correct operating state, ensuring the accuracy of the filling process.
Function: It is the interface for interaction between the operator and the servo control system, mainly used for setting and displaying various parameters of the system, monitoring the operating status of the equipment, and conducting fault diagnosis. The operator can directly input target parameters such as filling volume, filling speed, and pressure through the HMI, and can also view the operating data and alarm information of the equipment in real - time. The HMI can also provide a graphical operation interface, enabling the operator to operate and monitor more conveniently and quickly.
Example: On the HMI of the filling machine, there are usually various parameter - setting windows, an operating status display area, operation buttons, etc. The operator can input specific filling parameters such as the filling volume per bottle and the filling speed in the parameter - setting window. In the operating status display area, the working status of the filling head, the flow rate and pressure of the material, etc., can be viewed in real - time. Through the operation buttons, operations such as starting, stopping, and resetting the equipment can be achieved.
