Basics Of Mig Welding Explained


How to use an MIG welding machine? I will help you in learning how to MIG weld.

All you have to do is practice. With my tips, you may not have to practice as much if you were on you own & you can also follow tips provided online on the siteĀ

Gasless MIG Wire

Gasless MIG wire is the better option for users at home and for DIY welders. You do not need any gas for shielding in this case. This invariably means there is no use for an expensive gas bottle and rental.


Different kinds of welding wires are available, E71T-GS is the one required in this case. Make sure you have this code stamped on your welding wire box. Double check as there is a similar code available.


If you want, you can go for a solid wire for which ER70S-6 is the code. This wire is the standard one used for general welding purposes. For this wire, you need a shielding gas otherwise, it will not weld at all, period. You can choose your gas also. You can select either 100% argon or 100% CO2 or a mix of 25% CO2 with 75% argon this is the most common.

The CO2 content is the deciding factor in the weld penetration. Moreover, CO2 does not cost you as much. The problem, however, is it spatters a lot compared to other gasses. A combination of 75% argon and 25% CO2 is the best option. The weld bead will appear better if the argon content in the shielding gas is higher.

The weld will be much smoother if the percentage of argon is high. There are various combinations of gasses available which you can decide based on the chart available with the gas supplier. They even offer you with mixtures that contain one part of oxygen mixed with one part of argon and one part of CO2.

The clamp for the welding earth should not be rusted or contain any kind of oil, grease or mud. It is better to have the clamp closer to where you are going to weld. In case you are using MIG wires without shielding gas, the feed rolls need to be of the knurled groove type. You need to use vee grooved rolls for solid wires and u grooved rolls for aluminum wires.

There are various sizes available in contact tips. It is important to use the size which corresponds to the wire size. Welding nozzles vary with the welding equipment. Some of them are for applications using large current. Some of them can be used in small places. Special nozzles are also available for your machine for getting into tight spots and even spot welding.

Tack welding is employed in MIG welding, tig welding, and arc welding. A tack weld is a little weld that is placed in imperative positions of a project or work piece to hold it prepared to keep it square and deter it from warping out of square.

An example of a tack weld would be if you were making a gate out some steel box section. Step one would be to cut the steel to the mandatory lengths. Then you would lay the four lengths of steel on your workbench or on the floor.

You would then employ a square to align the steel into a rectangle and clamp them together. The tack welds are placed on all four corners so that it is stayed true and square. These tiny tack welds will when you full weld the steel together, forestall the steel frame from twisting and bend out of square a load more than if you simply started entirely welding it all up. Also, tack welds are little so that if you are making a howler you cut and square things up again, it’s miles better to grind away a minuscule tack weld vs a giant full weld. When you know the tack weld there are many other MIG welding basics that you can do.

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