Plasma cutting arc voltage
Plasma cutting arc voltage is the electrical potential difference between the plasma torch and the workpiece during cutting. It determines the torch standoff and affects cut quality.
How it works (physical-chemical)
The plasma cutting arc voltage sets the distance between the torch and the workpiece. High voltage means a bigger torch standoff and lower temperature at the workpiece. Low voltage brings the torch closer and raises the temperature.
Metallurgy and welding risks
Arc voltage too high can give you a weak, sloppy cut because the torch isn't working the workpiece effectively. Too low voltage heats things up and can lead to overheating and distortion of the workpiece. This can cause cracking or uneven cuts.
Shop practice and instructions
Optimum plasma cutting arc voltage is usually between 100 and 200 volts. You can tweak it a bit for different materials and cutting styles. Always keep an eye on the workpiece temperature and adjust the voltage to keep cut quality high.