MIG/MAG processes

Synergic MIG/MAG welding

Synergic adjustment, or 1-knob adjustment, means that the wire feed speed is connected to the voltage and possibly other parameters. This makes it easier to find the welding values, as only one knob is needed for power adjustment.

The ease of adjustment is based on preset synergy curves, which are stored in the control panel of the welding machine. A guideline material thickness can also be connected to the synergy curves, which makes it even easier to adjust the welding parameters.

Pulse welding

In pulse welding, the power source pulses the welding current so as to move the filler to the groove one drop at a time. The peak current of the pulse is great enough to spurt the material into the groove, while the lower basic current keeps the molten weld and the end of the welding wire molten. The pulse feature requires that several inter-dependent welding parameters be used.

Pulse welding is primarily used in welding aluminium and stainless steels. Additionally, nickel and copper alloys are often welded with the pulse feature.

The greatest benefit of pulse welding is the lack of spatters in the weld and its good appearance. With aluminium and stainless steels, pulse welding reduces the porousness. With nickel alloys and other difficult-to-weld materials, the pulse method makes welding easier.

Double-pulse welding

In double-pulse welding you can pulse also the wire feed speed in addition to the regular pulsing features. It means that the wire feed speed varies during the welding, and the user can adjust the amplitude and frequency of the variation. It allows for adjusting the desired penetration and creating clean welds. It also helps control the weld pool in various welding positions.

The frequency of a double pulse refers to the number of times a double pulse is repeated in one second, and the amplitude refers to the magnitude of the change. This affects the appearance and heat input of the weld.