The best plasma cutter under 500 are made by passing a gas through a narrow opening. You can choose from shop air, nitrogen or argon. You can also use these gases to make other things. This raises the gas’s temperature to the point where it becomes a fourth state of matter. The first three are well-known to us all: solid, liquid, or gas. This is what scientists call additional state plasma. The metal being cut is part the circuit. Therefore, the electrical conductivity in the plasma causes the arc of the plasma to transfer to the work. CNC units today use limited production computers or personal computers that are adapted for the purpose. Both offer the same quality cut and speed of production. CNC cutting allows you to arrange your shapes on the computer screen, and then cut them automatically without touching the material. You can program pauses to pierce, scale up or decrease in seconds, adjust acceleration and deceleration at corners and other functions that are not possible with an electric eye unit.
ReturnPlasma (or plasma arc cutting) refers to a melting process that uses a jet of ionized gas at temperatures higher than 20,000°C to melt and expel material. An electric arc is created between the electrode (cathode), and the workpiece. The electrode is placed in a water or air-cooled gasnozzle, which constricts and forms the plasma jet. Recombination occurs when the plasma jet hits the workpiece. The gas returns to its normal state and emits intense heat. The heat melts the metal, and the gas flow expels it from the cut. Plasma gases include argon, nitrogen and argon/hydrogen. These inert gase can be replaced with air, but it requires a special electrode made of hafnium and zirconium. This plasma process is highly competitive with the oxy fuel process, which can be used to cut carbon-manganese or stainless steels up 20mm thick. For high-quality cuts in reactive alloys, it is preferable to use inert gases.
Plasma arc is capable of cutting a wide variety of electrically conductive alloys such as plain carbon and stainless steels, aluminum and its alloys. It can also cut nickel alloys and titanium. This method was initially developed for cutting materials that could not be cut satisfactorily by the oxyfuel process. The plasma torch moves while the sheet or component to be cut is still stationary. Because the plasma torch’s cost is so low, it is possible to attach multiple torches to a table. You can also perform plasma arc cutting under water with specialized equipment. Plasma arc technology has seen significant advancements in the area of high-tolerance plasma arc cutting (HTPAC). This process can provide better precision for material less than 12mm thick, and is a cost-effective alternative to laser cutting.