Improving welding repair can but summarzied into five different areas: current setting, length of arc, angle of electrode, manipulation of the electrode, and speed of travel. Remembering all five steps while in the process of welding can be difficult, but like most things it gets much easier with practice.
- Before leaping into the "how to weld" information presented later in this article, take a minute to review the following advice, especially if you’ve never struck an arc or are still debating which machine to buy.
- DC welding offers advantages over AC for most Stick applications, including: easier starts; fewer arc outages and sticking; less spatter/better looking welds; easier vertical up and overhead welding; easier to learn "how to weld" and a smoother arc.
- DC reverse polarity (electrode positive) provides about 10 percent more penetration at a given amperage than AC, while DC straight polarity (electrode negative) welds thinner metals better.
- If you need to weld on material that's become magnetized from friction, such as when hay, feed or water constantly rub against a steel part.
- A DC output won't work because of "arc blow," where the magnetic field blows the molten filler metal out of the weld puddle. Because an AC output alternates between polarities, it enables you to weld magnetized parts.
- A 225 to 300 amp machine handles almost anything the average person will encounter,
- Duty cycle is the number of minutes out of a 10-minute cycle a welder can operate.
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