There are various arc types in MIG/MAG welding. They differ in terms of the level of the amperage. In the low power range the arc is susceptible to short circuits; in the higher power range it is free of short circuits.
The arc is ignited by brief contact between the wire electrode and the component. This produces a quickly increasing short circuit current, which liquefies the wire electrode and a droplet detaches. After the short circuit, the arc reignites. The dip transfer arc is used in the lower power range for thinner sheets and allows for welding to be carried out in almost any position. The dip transfer arc is also predominantly used in the root pass.
The pulsed arc is made up of a base current phase with a low power and a pulsing current phase with high power without short circuits. This means that almost no spatter is produced. In the pulsing current phase, the welding droplets are detached in a targeted manner via a precisely dosed current pulse.
This arc consists of a dip transfer arc and a pulsed arc. The necessary penetration and the heat input are generated in the phase of the pulsed arc, while the phase of the dip transfer arc provides for the cooling of the weld pool and makes it easier to manage.