When stick and work piece get short, its response will be quicker. It means that it is easier to design welding machine with different dynamic characteristics, and it can even be adjusted specially to make arc softer and also harder? TIG welding machine is easy for arc initiation and has the functions of arc initiation current, arc stop current, welding current, basic value current, current ascending time, current descending time, gas delay time, continuous adjustment What's more, pulse frequency and pulse duty can also be adjusted independently It has the characteristics of automatic control of arc initiation, arc stop and stable arc.