Plasma arc cutting is an amazing process that harnesses the ability of electricity and air (or other gasses) to cut almost anything that conducts electricity. This is a very fast and easy process to use that makes it extremely advantageous to production and very versatile for CNC tables and other mechanized operations. There are drawbacks in portability and start up cost. Once you get past the initial start up cost PAC is extremely easy to maintain a low cost to run. There are also minimal safety concerns when working with PAC. Throughout your welding career you will want to have a firm understanding of PAC as you will see it often.