The vacuum suction circuit consists of a vacuum supply valve 2, a vacuum break valve 3, a throttle valve 4, a vacuum switch 5, a vacuum filter 6 and a vacuum generator 1 to form a vacuum suction cup control circuit. When a vacuum needs to be generated, the solenoid valve 2 is energized. When the vacuum needs to be broken, the solenoid valve 2 is powered off, and the solenoid valve 3 is powered on. <br>Figure 3 shows the circuit using this generator assembly. When the solenoid valve 2 is energized, the compressed air passes through the vacuum generator <br>1. Due to the high-speed movement of the airflow, a vacuum is generated, the suction cup 7 sucks up the workpiece, and the vacuum switch 5 detects the degree of vacuum and sends out Signal, when the solenoid valve 2 is powered off and the solenoid valve 3 is powered on, the vacuum generator 1 stops working, the vacuum disappears, and the compressed air enters the vacuum suction cup 7 to blow the workpiece and the suction cup apart.
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