There are three reasons for the arc instability of the plasma cutting machine.
1.Pressure cause. If the pressure is too high too high, if the input air pressure is far more than 0.45MPa, after the formation of plasma arc, the excess air will blow the concentrated column, so that the arc column energy dispersion, weaken the plasma arc cutting strength. When the plasma cutting machine is working, if the working pressure is much lower than the pressure required by the manual, it means that the jetting speed of the plasma arc is weakened and the input air flow rate is less than the specified value. At this time, a high energy, resulting in poor quality of incision, cut through, the phenomenon of incision tumor.
2.Input AC voltage is too low
The use of plasma cutting machine site with large power facilities, cutting machine main circuit components within the fault, etc., will make the input AC voltage is too low.
3. Ground contact with the workpiece is bad
Grounding is an indispensable preparation for cutting. Do not use a dedicated grounding tool, the workpiece surface with long-term use of aging and serious ground, etc., will make the ground contact with the workpiece bad.
