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The power supply for portable CNC plasma cutting machines has different requirements for air pressure. Here we have summarized some common factors that are mainly manifested in high or low air pressure. Here are some reasons and solutions for people to cause the air pressure to be too low or too high:
1, the air pressure is too high; if the input air pressure far exceeds 0.45MPa, after the formation of plasma arc, excessive air flow will blow off the concentrated arc column, so that the arc column energy dispersion, weakening the plasma arc cutting strength. The causes of high air pressure are: improper input air adjustment, excessive air filter pressure regulator or air filter pressure regulator failure. ; Solution: Check if the air compressor pressure is properly adjusted and if the pressure of the air compressor and air filter regulator is out of adjustment. After starting up, if the rotary air filter pressure reducing valve adjusts the switch, there is no change in the gauge pressure, indicating that the air filter pressure reducing valve is out of order and needs to be replaced.
2. When the pressure is too low, the portable CNC plasma cutting machine is working, if the working pressure is far lower than the pressure required by the specification, this means that the discharge speed of the plasma arc is weakened and the input air flow is less than the specified value, and high energy cannot be formed at this time. High-speed plasma arcs result in poor incision, impenetrability, and kerf accumulation. The reasons for the lack of air pressure are: lack of input air from the air compressor, low pressure adjustment of the air conditioner valve of the cutting machine, oil pollution in the solenoid valve, and unobstructed gas path. Solution: Observe the output pressure of the air compressor before use. If it does not meet the requirements, adjust the pressure or overhaul the air compressor. If the input air pressure has reached the requirements, check whether the air filter pressure reducing valve is adjusted correctly and whether the gauge pressure display meets the cutting requirements. Otherwise, perform routine maintenance on the air filter regulator to ensure that the input air is dry and free of oil. If the input air quality is poor, it will cause oil pollution in the solenoid valve, the valve core opening is difficult, and the valve port cannot be fully opened. In addition, torch nozzle gas pressure is too low, but also need to replace the solenoid valve; gas cross-section smaller will cause the air pressure is too low, according to the instructions to replace the trachea.
In the use of portable CNC cutting machine, need to be equipped with air compressor auxiliary cutting, high-pressure air flow will form a smooth cut in the cut section, in general, select the type of air pressure need to be selected according to the input current size, with 100A plasma power supply as an example The equipped air compressor needs to be around 0.5-0.6 square feet. At the same time, in the daily operation, the adjustment of the air pressure is also very important. The stability of the arc of the plasma cutting machine directly affects the quality of the cutting, and the arc of the plasma cutting machine is unstable, which can lead to irregularities in the incision and defects such as accumulation of defects. The life of the relevant components of the control system is reduced, and the nozzles and electrodes are frequently replaced.
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