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Huazhong CNC System Knowledge Lecture (Lesson 11)
In order to ensure the normal operation of the equipment, the DC power supply often needs to have a pole grounding, as a reference zero potential, and other poles are compared, such as ±15V, ±5V, ±24V. Signal transmission also often requires a line to ground, as a reference potential, the size of the transmitted signal is compared to the reference potential. This kind of ground wire is called the working ground wire. In the system, we must pay attention to the correct connection of the working ground wire. Otherwise, it may not cause the interference but may cause interference, such as common ground impedance interference, ground loop interference, common mode current radiation. and many more.