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Plasma Cutting Machine Cutting Specification One
- Nov 20, 2017 -

1. No-load voltage and arc voltage

Plasma cutting power, you must have a sufficiently high no-load voltage in order to easily arc and plasma arc stable combustion. No-load voltage is generally 120-600V, while the arc voltage is generally half the load voltage. Increasing the arc-column voltage significantly increases the power of the plasma arc, thereby increasing the cutting speed and cutting the sheet metal to a greater thickness. Arc column voltage is often not achieved by adjusting the gas flow and increasing the electrode shrinkage, but the arc column voltage can not exceed 65% of the no-load voltage, otherwise it will make the plasma arc unstable.

2. Cutting current

Increasing the cutting current also increases the power of the plasma arc, but it is limited by the maximum allowable current, otherwise the plasma arc will become thicker, the kerf width will increase, and the life of the electrode will decrease.

3. Gas flow

Increasing the gas flow can not only increase the voltage of the arc column, but also enhance the compression effect on the arc column to make the plasma arc energy more concentrated and the jet force stronger, which can improve the cutting speed and the quality. But the gas flow is too large, but will shorten the arc column, the loss of heat increases, so that cutting ability weakened until the cutting process can not be normal.