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Iv. Inspection method for oil leakage on the surface of four-column press:
1. Physical isolation method increases the distance between the affected circuit or device of the four-column hydraulic press and the interference source.Since the intensity of interference is inversely proportional to the square of the distance, it is recommended to use a stable power source.In order to suppress the noise of the power supply of the four-column hydraulic press and the interference between the power supply and the ground cable, the power supply and the CNC device can be connected and isolated
2. Shielding method.In order to prevent the four - column hydraulic press and components from being affected by external electromagnetic field, isolation shielding measures are usually adopted, electromagnetic shielding or discharge by reflection or absorption.
3. Grounding mode: The four-column oil press connects its enclosure with the earth.For protection grounding, if the system grounding of a four-column hydraulic press is connected to the earth as a system grounding, anti-interference can also be achieved by means of protection grounding or system grounding.
4. The filter can suspend input interference and interference induced by signal transmission line.The low-pass filter and DC filter are commonly used. They are generally installed between the power supply of the four-column hydraulic press and the NUMERICAL control device.