One of the most common welders is the MIG welder. These welders work by feeding an electrode wire through a welding gun with a continuous flow of inert gas, called the shield gas.
The most common shield gas used is carbon dioxide. It is the cheapest welding gas and it also makes a good weld. Argon and carbon dioxide are sometimes mixed to create a weld with less spatter, which gives a cleaner weld.
The GMAW process has some advantages over the more common welding processes. The welding gun is equipped with a trigger which is connected to the electrode. This allows you to position the electrode properly first, before you pull the trigger, creating the welding arc.
You can adjust the voltage, amperes and speed of feeding the wire With an MIG welder. The tension on the welding wire can also be varied, and it also has a valve to control the flow of gas.
It is even possible to use an MIG welder without shield gas. This is called flux cored arc welding (FCAW), as it requires a flux cored welding wire. This wire is hollow in the middle and filled with flux. Most welding guns have an option of switching the polarity of the welding arc, which is used with flux core wires.
MIG welders can be used to weld a variety of metals, including aluminum, tin, copper, zinc, brass and steel. There are dozens of compositions of welding wires to choose from, for all types of situations. For a beginner, according to mig welder reviews, a MIG welder is the ideal choice, as it can weld many types of metal, is versatile and easy to use.
How To Use A Mig Welder
The first thing you need is to purchase an MIG welder and the proper gear. Mig welding is probably one of the easiest types of welding to learn, but you should practice on scrap metal before working on your favorite project.
Always purchase the proper safety gear. At the top of the list, there should be a welding helmet. Would recommend an auto darkening welding helmet, which is battery operated. You also need to cover your whole body with proper clothing and gloves because the welder will give off sparks that can burn your skin.
Next, pick a suitable location to start welding. A large concrete work floor, such as your driveway, is always a good place. Remember that using a welder always has a fire hazard because the sparks it gives off generate heat, so keep a bucket of water or a fire extinguisher nearby at all times.
Now you are ready to start operating the MIG welder. There are three main things you need to consider. These are the tip voltage, feed rate and how fast you move the tip. How you adjust these three factors will determine how good the weld is.
The voltage controls the penetration, while the feed rate of the wire will adjust the arc length and the speed at which you move the tip controls the transfer of metal to your work area. If the voltage is lowered, the weld will sit on top and too high will result in just creating a hole. This is why you need to practice, to get a good feel for it.
Now you need to find a good speed to move the tip. If the tip moves too fast, you will hear loud popping noises and lose the arc. If you move it too slow, the tip might melt and fuse to your work, which is a real hassle. Again, practice is critical, and it is not that hard after a few tries.
Now that you have experimented and found the correct voltage and feed rate and you feel comfortable using the MIG welder, it is time to start on the real thing. Remember the key is to keep the tip moving consistently. At first, it will seem a bit tricky, but after a while, you will be welding all kinds of things.