MIG welders are units that are of immense importance both in homes and industrial purposes. It uses an arc welding mechanism in welding of metals.
MIG welders use electrodes in cutting and merging of metals together. The electrodes/wires are of different types depending on the functionality of the unit that you’re using.
Notwithstanding, this equipment comes in different forms. Therefore, it’s paramount that users understand the features and know how to use the features. There is also a roller tension which is adjustable. The adjustability of this function affects solely the speed of the wire feed.
This has to be done before welding so as to make accurate precision, and it’s mostly done together with voltage. The performance is amazing. At the press of the trigger, the gases automatically flow and propel the electrode into high performance. The influence of this shielded gas is to aid users in making accurate precision.
However, the propensity of the motion of the electrode is determined by the regulation of the functions that a product consists. Aside from that, improper handling can lead to accidents.
In fact, researchers indicate that the falling of atomized flakes (UV rays) that escapes into the air on the epidermis during the process can lead to cancer or skin damage.
Therefore, that’s why it’s essential that users learn how to use a MIG welder so as to avoid mishaps. So, let’s find out the systematic manner that you can safely use a MIG welder.
8 Things to Consider about How to Use a MIG Welder:
1. Personal Preparation
- Make sure that you put on a thick cloth that covers your whole body, from your neck to the heel of your legs.
- Put on industrial shoes and hand gloves.
- Industrial glasses is needed while welding.
- You might need an earmuff so as to prevent you from environmental disturbances.
- Be sure that no water is found around that can tamper with the surface of the workpiece.
- Also, ensure that you get all the needed materials available and prepare them before you initiate its performance.
- Choose the best product that suits your comfort in terms of circuit capacity, portability, and performance.
- You might need a table with a plain surface for comfortable placing of the workpiece.
2. Preparation of Workpiece
It’s very essential that one clean the surface of the workpiece before it’s welded. This would prevent users from prospective accidents and it aids one to make accurate precisions.
Also, have a clue on how you intend welding your workpiece. The three methods that you can practice are T-joint, butt-joint, and lap joint. However, before one begins to weld, one must ensure that no flammable object is left close-by.
In fact, it’s advisable that one choose a secluded region where is not windy so as to make a clean flawless work, especially while joining thick metals of 3/8” or aluminum. As a matter of fact, we’ll enjoin you to make the right choice while choosing an instrument.
3. Tips for Choosing Best Electrodes for Best Work While Welding
There are several modes that you can use a MIG welder for. The modes that you use it for depends on the nature of the workpiece that you’re working for.
The modes are short circuits, globular transfer, and spray transfer meanwhile the modes are used for thin metals, heavier metals, and hottest respectively.
Furthermore, for shield welding, you might want to choose between AWS ER703SS-3 and AWS ER703SS-6. The former is used generally for steel materials while the latter is used for rusty steel.
Notwithstanding, for thicker ones, you’d need E71TGX which seemly doesn’t require shield gases. As a matter of fact, they are used in a windy environment. Please note that those that use gas tanks don’t use flux-core although some possess both features.
4. Adjusting the Tensioner
- Know the components on the unit that you’re using, and identify the tensioner.
- The wire has to be cut with a wire cutter into a convenient size. However, this might not be necessary for experts.
- Ensure that the MIG welder is cold at first before fixing the adjusted wire.
- Afterwards, reduce the roller tension to the optimal minimum.
- Fix the wire in the guide tube/liner, then tighten up the roller tension. Make sure that it’s not completely tightened.
- You can use the tip of your finger to feel the firmness of the wire to the liner.
- Notwithstanding, you’d have to switch on the power while feeding the MIG touch with the wire.
During the pre-sets we enjoin you to maintain the position of the electrode so as to attain a regular precision. Also, make sure that you know the power supply mechanism that your unit operates with.
5. Flat Position
For flat welding, you’d have to position the MIG welder at the top of the base metal. There are 3 forms of welding that you can achieve with this: they are butt joint, T-joint, and Lap joint.
The categorization is based on the degree that base metals are positioned for welding. A butt joint is achieved when base metals are positioned in 180 degrees.
Meanwhile, the T-joint is achieved when base metal is arranged in 90 degrees while lap weld is known as fillet weld. Whenever you want to weld any of these, you’d have to position it “half-target”.
That is; for butt welding, position the spool gun at 90 degrees of the workpiece and at 45 degrees for T-joint while either 60 or 70 degree for lap joints.
6. Horizontal Position
Make sure that you master the voltage and the amperage that’s the best suit the work that you’re doing. And while you’re working on this position, the temperature of the welder has to be regulated within a range of 0 and 15 degrees.
Also, it’s expected that the tip of the MIG welder is preheated before it’s used so as to make penetration pretty easy.
7. Vertical Position
Albeit, provided you’re welding a material vertically, you’d have to regulate the temperature within the range of 10-15% from the angle used for flat position, why?
So as not to be disrupted by gravity. In fact, it’s advisable that one begins to weld from the tip of the workpiece to the nadir while welding a thin material while the inverse is the case for the thicker ones.
8. Overhead Position
Meanwhile, this position is of two major techniques, dragging and pushing. Whichever you imbibe while welding, the MIG welder would penetrate, but dragging is deeper and reliable for thick surfaces than thin surfaces.
Nonetheless, the travel speed must be high while the amperage and voltage must be reduced for perfect work-done.
This is just how to use a MIG welder. The choice of an electrode is as important as the setups so it’s advisable that one practice the directions constantly. This information is alone to provide succor to your need. The information that’s provided is highly reliable and one can use it to operate all MIG welders.