How to Test a Plasma Cutter

Clamp the ends of a piece of scrap metal securely between two solid tables, so that there is nothing below the metal.

Measure the thickness of the metal you are cutting. Consult the cutting speed chart for your plasma cutter. Match the thickness of the metal with the curve in the graph that represents the metal that you are cutting to determine how fast you should move the cutter. For instance, stainless steel that is approximately 3/8 inch thick can be cut at a maximum of 50 to 60 inches per minute.

Place the drag shield flush against the surface of the metal. Angle the arc of the plasma cutter so that it is pointing straight down.

Pull the trigger to immediately begin cutting. Slowly move the plasma cutter along the surface of the metal in an arc.

Observe the space below the metal as you cut. The sparks from the plasma cutter should be released underneath the metal to guarantee that you are cutting through it. If you do not see sparks below the metal, move the plasma cutter more slowly until you see the sparks. If you still do not see sparks, switch off the trigger and adjust the angle of the arc and the drag shield so it is flush against the metal.

Repeat this process for various types and thicknesses of metal. Once you have tested the plasma cutter on different types and thicknesses of metal, apply the settings and speed to the metal you are cutting to complete projects.