Basic advice to obtain you started with MIG welding, consisting of information on brand-new equipment and also settings.
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Optimal performance with your MIG welder

Unless friend weld for a living, it is often an overwhelming to understand if yourMIG welderis set up because that optimal performance. If you uncover yourself asking questions such as "am I using the appropriate voltage?” or “do I have too lot or too little wire?” climate this post is because that you! We will touch on the basics of properly setup up your welder, and also then look at what your weld bead is telling you.

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Equipment

Good tools makes MIG welding easier, while poor equipment can price you dearly in frustration and also weld quality. MIG welders such together the Millermatic® 211 and also Millermatic 141 are ideal for the occasional welder. If you’re in search of a device with lot of welding capabilities, us recommend multiprocess welders favor the Multimatic® 215 and also Multimatic 220 AC/DC.

Some welding makers include an innovation advancements, such asAuto-Set™ technology, which set optimal parameters automatically based on material thickness and also wire diameter. This enables you to focus on appropriate technique.

To identify which welding an equipment best fits her needs, watch Which Welder is right for Your residence or Shop or download this guide.

Getting the most from your machine

Regardless of your device choice, review your owner"s manual. It consists of important information around proper operation and also safety guidelines. Many companies offer their manuals online.

The following an easy guidelines are forMIG weldingsteel with solid wire. Joint design, position and other factors affect results and also settings. When good results space achieved, document the parameters.

1.Material thickness determines amperage. As a guideline, each .001 inch of product thickness needs 1 amp of output: .125 inch = 125 amps.

2.Select proper wire dimension according to amperage. Because you don"t want to adjust wire, select one for her most generally used thicknesses.

30-130 amps: .023 customs 40-145 amps: .030 customs 50-180 amps: .035 inch 75-250 amps: .045 inch

3.Set the voltage. Voltage determines height and also width the the bead. If no chart, hands-on or specifications are easily accessible for setup the correct voltage, girlfriend can shot this: while one human welds ~ above scrap metal, an assistant turns down the voltage until the arc start stubbing into the workpiece. Then, begin welding again and have an assistant increase the voltage till the arc becomes unstable and sloppy. A voltage midway in between these two points gives a an excellent starting point.

There is a relationship in between arc voltage and also arc length. A brief arc to reduce voltage and yields a narrow, ropey bead. A much longer arc (more voltage) produce a flatter, wider bead. Too lot arc size produces a an extremely flat bead and the opportunity of undercut.

4.Set the cable feed speed. Wire rate controls amperage and the amount of weld penetration. A rate that"s as well high have the right to lead come burn-through. If a hands-on or weld specification sheet is not available, usage the multiplier in the complying with chart to find a an excellent starting point for wire feed speed. For example, for .030-inch wire, main point by 2 inches every amp to discover the cable feed rate in inches every minute (ipm).

For cable size

Multiply by

Ex. Making use of 1/8 customs (125 amps)

.023 inch

3.5 inches per amp

3.5 x 125 = 437.5 ipm

.030 inch

2 inches per amp

2 x 125 = 250 ipm

.035 inch

1.6 inches per amp

1.6 x 125 = 200 ipm

.045 inch

1 customs per amp

1 x 125 = 125 ipm

Examining the beads

One way to examine your parameters is by examining the weld bead. That is appearance suggests what needs to it is in adjusted.

Good weld: Notice the great penetration right into the basic material, flat bead profile, ideal bead width, and good tie-in at the toes of the weld (the edges where the weld metal meets the basic metal).

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Voltage as well high: Too much voltage is marked by poor arc control, inconsistent penetration and a rough weld swimming pool that fails to consistently permeate the base material.

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Voltage as well low: Too little voltage outcomes in negative arc starts, control and also penetration. It also causes excessive spatter, a convex bead profile and also poor tie-in at the toes the the weld.

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Travel speed too fast: A narrow, convex bead with insufficient tie-in in ~ the toes that the weld, insufficient penetration and also an inconsistent weld bead are resulted in by traveling as well fast.

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Travel rate too slow: Traveling too slow introduces too much warmth into the weld, bring about an excessively vast weld bead and poor penetration. ~ above thinner product it may likewise cause burn-through.

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Wire feeding speed/amperage too high: Setting the wire feed speed or amperage as well high (depending ~ above what type of an equipment you"re using) have the right to cause negative arc starts, and lead to an excessively wide weld bead, burn-through, too much spatter and also poor penetration.

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Wire feed speed/amperage also low: A narrow, oftentimes convex bead with bad tie-in at the toes of the weld marks poor amperage.

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No shielding gas: A absence of or inadequate shielding gas is easily established by the porosity and pinholes in the face and also interior that the weld.