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Posts Tagged ‘amperage’

Tig welders, one of the most efficient and useful welder in the industry saw many growths and when you consider the history of welding, this welder had played its part better than any other welding machines. Being the useful welder for the industries, it offers different features to the users and industrialist who need the help of this machine. It plays such a role and though different types of welders exist, this one has great fame in the welding industries. Its versatility, speed, operating efficiency and much more options seems to be better than its other competitors. When buying tig welders for sale, you should be aware of the general facts and news about the best welders so that you can remain happy that you bought the best one.

When buying tig welders for sale, follow some of the tips such as Determine the kinds of metal you’ll be welding with. TIG welding is used for high-quality and exact welding using metals like aluminum, magnesium alloy, steel, brass, copper and titanium. TIG welders with high amperage ranges — from four to 230 amps — can usually use a higher variety of materials. Consider a TIG welder with both AC and DC power options for the widest range of makes use of. While oxidizing soft metals like aluminum need AC current, harder metals like stainless steel use DC current. When using the low amp setting, pay attention to the arc stability so that you get better control and crater filling capabilities. Decide where you’ll primarily use the TIG welder. If space and portability are issues, select a smaller, lighter machine that you can store away when not in use or basically travel with.

Find a TIG welder with foot controls for the amperage. While some have finger controls, a foot control lets you focus your hands on the actual welding while controlling the amperage along with your foot. Match the metal type you require to weld to the tig welder’s electrical input. For example, in the event you need a welder able to welding hard metals such as steel or forged iron or bronze, an alternating current (AC) welder will work. AC welders operate using electricity that alternates direction back and forth. In the event you need to weld soft metals such as aluminum, you need a direct current (DC) welder. DC electricity creates a steady arc for the welder and comes from battery cells. Compare features. Tig welders come with a variety of features that include automatic fans and high-frequency arcs. High-frequency arc helps to keep the welder’s electrical current steady that provides a precision weld. Select a welder with as lots of features as you can afford.

Compare duty cycles. A welder’s duty cycle indicates how long the welder can operate in the work of a 10-minute interval without overheating. For example, a tig welder that can weld for weld minutes but needs six minutes downtime to cold off has an obligation cycle of 30 percent. Duty cycles range from 15 percent to 60 percent. Also, compare the warranties so that you can buy the better one.

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The theory behind keeping an arc going is, the electrical current is forced between the welding rod tip and the steel you are welding. If you want to be a successful welder you must be able to strike an arc and keep it going without even thinking about it.

The 2 most common ways of starting your arc are by tapping and scratching your welding rod to the steel. Scratching seems to be the most natural way used by beginners.

Scratching is when you swipe the rod across the steel as if you were trying to light a match. Once the rod makes contact with the steel, the arc starts. The only real reason for scratching it to get it started is so it won’t stick to the steel since it is in motion. The trick then is to locate where you want to weld and try to keep the arc going. This takes some practice to get the hang of it.

Tapping is basically stabbing the steel with your welding rod. This is better for starting your rod in the correct welding location, but it is harder to keep the rod from sticking and still maintaining an arc. The natural reaction is once the arc strikes, you will want to pull it away to keep it from sticking. The only problem is, beginners tend to pull it too far away and lose the arc. This can go on and on and is actually pretty funny to watch someone doing this. But we all need to remember we were new at one point also.

Sticking of your welding rod is caused by the rod melting to the steel before it is pulled away slightly to maintain it’s arc. I won’t go into how far away it should be from the steel since it is dependent on what type of rod you are using and the amperage you are welding with.

These are the basics and should give you an idea of how to strike an arc. Just remember that it takes practice and patience to get good at it. One day you will grab the stinger and it will all just click in your head. It will almost start to feel natural, then you will know it’s all coming together.

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