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Welding techniques: MIG/MAG continuous wire welding

We are back with our monthly column about welding, which describes the main techniques, accessories and materials that you need to know in order to choose the best welding machine suited to your needs.

Today we are talking about MIG/MAG continuous wire welding.

This technique is based on the fusion of a welding wire, generally solid metal, through heat generated by the electric arc.

The wire is automatically fed into the fusion bath under gaseous protection, by means of a torch connected to the positive pole of the welding machine. The wire feeder then conducts the wire from the torch to the workpiece.

Throughout this process, the gas plays the same role as the electrode coating, i.e. it protects against oxidation and allows slag-free working.

What is the difference between MIG (Metal Inert Gas) and MAG (Metal Active Gas) welding?

Depending on the gas protection, we distinguish between two types of continuous wire welding:

MIG (Metal Inert Gas) welding is achieved by using an inert gas that does not participate in fusion, such as Argon or Helium.

MAG (Metal Active Gas) welding, on the other hand, is based on the use of an active gas, such as CO2 or ArCO2 mixtures in different percentages, depending on the material that is being welded. In this case, the gas takes part in the fusion.

How and what may be welded with a continuous wire welding machine?

Continuous wire welding is ideal for carrying out a large number of welds with high filler volumes. It may be used on engine driven welders with electronic welding control.

It is a very versatile technique and rather easy to handle. It is, however, preferable to weld indoors to prevent weathering to take place, stripping it from the gaseous protection.

It is usually used for welding steel, light metal alloys, copper, nickel and titanium.

The equipment is rather bulky and therefore difficult to transport, as the gas cylinder must also be carried.

Want to know more? Click here to find out more about our engine driven welders or write to us for a tailor-made consultation.

The Briggs & Stratton powered Genset range has been extended with a new engine driven welder

The MPM 5/200 IELBN engine driven welder is the new addition to the Briggs & Stratton powered range.

The features

• Lightweight, safe and easily transportable, it is also available with a trolley for effortless handling.

200 Ampere DC coated electrode welding, which may be used as both a generator and welder simultaneously (within the power limits of the machine).  

• It has a 4,5 kVA three-phase and 3,6 kVA single-phase AC generator.

6,6 litre fuel tank which results in two hours’ working autonomy.

• Set up for remote control operation, allowing one to comfortably adjust the welding current from the workstation. Once connected to the front panel connector, the remote control is immediately operational.

The Briggs & Stratton engine

The engine driven welder is equipped with a Stage V XR 2100 petrol engine from Briggs & Stratton, a world leader in the production of air-cooled petrol engines.

It is reliable and fuel efficient, as well as meets the most stringent emission regulations.

For further information please download the product data sheet and do not hesitate to contact us for a tailor-made consultation.

Welding techniques: Shielded Metal Arc Welding (SMAW)

Today we are launching our new monthly column dedicated to welding. It will tell you all you need to know regarding the main accessories, materials and techniques in order to choose the best engine driven welder for your needs. Let’s start with the best known: Shielded Metal Arc Welding (SMAW).

Shielded Metal Arc Welding: what is it?

It is the most common, fastest and cheapest method of welding.

It uses an electrode that is coated with specific materials, which prevents the weld from oxidizing and allows it to stabilize the current arc.

Let’s start with the basics: To begin with, an electrode holder and the material that needs to be welded is connected to the polarities of the welder. The electrode is then attached to the clamp, and when it is brought into contact with the material that needs to be welded, a current arc is produced. In this way, the material that needs to be welded, the coating of the material and the electrode core fuse together.

The different types of electrodes and their electrode coating types:

Acidic (silica, iron silicate): cheap, provides good arc stability.

Cellulosic (cellulose, silicon, manganese): excellent penetration capacity in the material. Suitable for precision work with little slag in the bath.

Rutile (rutile): cheap and easy to store, very smooth welds.

Basic (calcium and magnesium): high purification capacity of the base material, suitable for objects that need to be welded with a greater thickness.

What materials can be arc-welded with a coated electrode?

Almost all materials may be arc-welded, with the exception of lead, zinc, tin, oxygen-reactive and refractory materials.

This process is very versatile but is not recommended for welding joints thicker than 40mm. But we’ll talk about that next time.

In the meantime, follow us on our social to stay updated and find out more in the Engine Driven Welders section, or write to us for a tailor-made consultation.


Gen Set S.p.A.

Società a socio unico
Via Stazione, 5 - 27030
Villanova d’Ardenghi (PV)
C.F. 10211540157
P.IVA 01470510189