Plasma cutting is a practice that all welders should master. It involves using a jet of hot plasma to cut through conductive materials. Whether you're new to a welding hobby or are a professional trying to improve your technique, the following tips can help you succeed.

A Guide to Plasma Cutting

1. Start With the Right Tools

There are various plasma cutters designed for different needs. If you are a professional working on large-scale projects, look for a high cutting speed and a strong duty cycle. You should also consider the cutter's weight and portability if you're planning to use it in multiple locations. For hobbyists or mobile welders, a hand-portable unit that can switch from 120 volts to 240 volts is ideal. 

2. Trace & Test First

Before you pull the trigger for any cuts, conduct a practice tracing. This exercise will give your arm some muscle memory. You'll also be confident you have the freedom of movement to complete the full cut. If you're working with new material, try a sample cut on a spare piece to ensure you're using the right settings.

3. Use the Right Speed

Hold the nozzle just above the surface of the material as you work. Many beginners tend to move too slowly, which creates an unclean cut and the formation of slag. When moving the cutter, the arc should pull off the material at an angle between 15 and 20 degrees. If it moves straight down, you're going too slowly. 

4. Inspect the Equipment

Machine consumables will need replacement as they're used. This maintenance will keep your torch in excellent condition. Check the nozzle for oxide residue, the electrode for deeper pitting, the gas channels for dirt or cracks, and the conductive joints for looseness. 

If you're ready to try plasma cutting, pick up your welding supplies at Wayne Oxygen & Welding Supply Co. in Charlottesville, Harrisonburg, and Waynesboro, VA. This company carries quality products from Lincoln Electric Company and Miller Electric Manufacturing. Their expansive inventory includes masks, compressed gas, and torches. Visit their website to learn more about their available equipment, or call (540) 942-4145 to ask any questions.