A full facemask may be required for arc welding.
Welding was increasingly used in sculpture from the 1930s as new industrial processes such as arc welding were adapted to aesthetic purposes.
In arc welding, the length of the arc is directly related to the voltage, and the amount of heat input is related to the current.
In open-air applications, such as construction and outdoors repair, shielded metal arc welding is the most common process.
A related process, plasma arc welding, also uses a tungsten electrode but uses plasma gas to make the arc.
It is designed for programming an arc welding robot in small batch production and is expected to provide low-skill users with a means to use industrial robots with ease.
The use of sensors implied deviation from some nominal condition and in robotised arc welding a change of path could lead to several malfunctions that had to be detected.
The survey also indicated that arc welding was the main application of robots installed in 1996 accounting for 81, some 32%, of the 250 robots installed.
