Gas Metal Arc Welding : Sheet Meta 6. Oxidation is just __ air, oxides from the air, getting into the weld __ If you allow oxygen or other gases from the air - __ specifically - __ other gases into the weld pool, and other __ in the air into that weld pool, you are going to get __ in the weld pool. 7. The advantages of 75/25 is that it is used to get better __ action, less __ or spatter, on your base metal when welding 8. When you get into other __ beyond steel and different modes of __ transfer, you are going to have to change up the gas mixture or the type of __ being used System 1. For those of you that have done some welding in the past or maybe using some older equipment, you are going to note that the wire __ from the __ down on the newer machines 2. Different types of __ need different kinds of tension. So for example, aluminum wire, if you are running a push-pull setup, and you are running aluminum wire through this machine, you are not going to use near the tension that you would use on mild __ because aluminum is very.very __ and you are going to cause it to not want to feed through that lead 3. It is very important, and a lot of people do not think this is important for whatever reason, to change the __ to match the diameter of the __ that you are using 4. There are even specific types of drive rolls. __ that have little __ in them for other applications 1. This is where the __ gas is going to be directed out onto the base Changing Filler Wire Spool __ And I am using these welper-style, or welder's __ These are great for most MIG and __ applications because of the way they are designed they are __ for this very reason. Contact tip-this is what carries the __ current from the itself. __ that I am going to show you inside this lead to the __ companies: Gas Metal Aro Welding Sheet Metal

6. Oxidation is just air, oxides from the air, getting into the weld. If you allow oxygen or other gases from the air - specifically - other gases into the weld pool, and other impurities in the air into that weld pool, you are going to get porosity in the weld pool.<br /><br />7. The advantages of $75/25$ is that it is used to get better arc action, less slag or spatter, on your base metal when welding.<br /><br />8. When you get into other metals beyond steel and different modes of metal transfer, you are going to have to change up the gas mixture or the type of shielding gas being used.<br /><br />System<br /><br />1. For those of you that have done some welding in the past or maybe using some older equipment, you are going to note that the wire feeds from the spool down on the newer machines.<br /><br />2. Different types of wire need different kinds of tension. So for example, aluminum wire, if you are running a push-pull setup, and you are running aluminum wire through this machine, you are not going to use near the tension that you would use on mild steel because aluminum is very brittle and you are going to cause it to not want to feed through that lead.<br /><br />3. It is very important, and a lot of people do not think this is important for whatever reason, to change the drive rolls to match the diameter of the wire that you are using.<br /><br />4. There are even specific types of drive rolls that have little teeth in them for other applications.<br /><br />1. This is where the shielding gas is going to be directed out onto the base metal.<br /><br />Changing Filler Wire Spool<br /><br />1. And I am using these wire feeder-style, or welder's guns. These are great for most MIG and TIG applications because of the way they are designed; they are versatile for this very reason.<br /><br />Contact tip-this is what carries the current from the power source to the weld pool.