Mild Steel Electrode, GAS Type | Lincoln Electric IM822

B-14

OPERATION

B-14

Contact Tip

Wire Electrode

ESO

FIGURE B.22

3. The Correct Electrical Stickout (ESO)

The electrical stickout (ESO) is the distance from

the end of the contact tip to the end of the wire.

See Figure B.22.

Once the arc has been established, maintaining

the correct ESO becomes extremely important.

The ESO should be approximately 3/8 to 1/2 inch

(10 to 12 mm) long.

The easiest way to tell whether the ESO is the cor-

rect length is by listening to its sound. The correct

ESO has a distinctive “crackling” sound, very much

like eggs frying in a pan. A long ESO has a hollow,

blowing or hissing sound. If the ESO is too short,

you may stick the contact tip or nozzle to the weld

puddle and/or fuse the wire to the contact tip.

4. The Correct Welding Speed

The important thing to watch while welding is the

puddle of molten metal right behind the arc. See

Helpful Hints

1.For general welding, it is not necessary to weave the arc, neither forward or backward nor sideways. Weld along at a steady pace. You will find it easier.

2.When welding on thin plate, you will find that you will have to increase the welding speed, whereas when welding on heavy plate, it is necessary to go more slowly in order to get good penetration.

3.When welding sheet metal 16 gauge (1.5 mm) and lighter, heat buildup may cause part warpage and burn through. One way to eliminate these problems is to use the back-stepping method illustrated in Figure B.21.

Practice

The best way of getting practice in the four skills that enable you to maintain:

1.Correct welding position

2.Correct way to strike an arc

3.Correct electrical stickout

4.Correct welding speed

is to perform the following exercise.

For the MACHINE , use the following:

Figure B.23. Do not watch the arc itself. It is the

appearance of the puddle and the ridge where the

molten Puddle solidifies that indicates correct weld-

ing speed. The ridge should be approximately 3/8”

(10 mm) behind the wire electrode.

Mild Steel

Electrode

16 gauge or 1/16 inch

(1.6 mm)

Lincolnweld 0.025 L-56 electrode

Most beginners tend to weld too fast, resulting in a

thin, uneven, “wormy” looking bead. They are not

watching the molten metal.

GAS TYPE

Coarse Voltage Setting

Fine Voltage Setting Wire Speed Feed Setting

75Ar / 25 CO2

“Hi”

“2” “7”

100% CO2

“Hi”

“1” “5”

Molten puddle

Weld metal ridge

Base metal

FIGURE B.23

Refer to Figure B.20.

1.Learn to strike an arc by positioning the gun over the joint and touching the wire to the work.

2.Position face shield to protect face and eyes.

3.Depress gun trigger, hold gun so contact tip to work distance Is about 3/8 to 1/2 inch (10 to 12 mm) and the gun is at proper angle.

MIG PAK HD

IM822 specifications

The Lincoln Electric IM822 is a cutting-edge multi-process welding machine that is making waves in the welding industry for its advanced capabilities and user-friendly features. Known for its versatility, the IM822 supports a variety of welding processes including MIG, TIG, and stick, accommodating a wide range of applications in both industrial and commercial settings.

One of the standout features of the IM822 is its inverter technology, which enhances both performance and efficiency. This inverter-based system allows the welder to output a stable arc, even in fluctuating input power conditions, making it ideal for use on job sites with inconsistent power supplies. The lightweight and compact design of the IM822 are direct benefits of this inverter technology, allowing for portability without sacrificing power.

The IM822 also boasts an impressive duty cycle, which allows for prolonged use without overheating. This characteristic is crucial for professional welders who require consistent, high-quality welds over extended periods. Additionally, it is equipped with an easy-to-read digital display that presents key information such as voltage and amperage settings, giving operators precise control over their work.

User-friendly interface is another hallmark of the Lincoln Electric IM822. The machine comes with intuitive controls that make it easier for both novice and experienced welders to navigate through settings quickly. With preset programs, users can select the most suitable parameters for specific materials and thicknesses, thereby enhancing productivity and reducing setup time.

Moreover, the IM822 excels in providing versatile welding capabilities, allowing it to handle various materials, including stainless steel, aluminum, and mild steel. The machine's robust construction further ensures durability, making it a reliable tool that withstands the rigors of demanding work environments.

Incorporating safety features such as thermal overload protection and an automatic shut-off system, the IM822 promotes safe operation, minimizing the risk of accidents. With a history of quality and innovation backing it, Lincoln Electric has positioned the IM822 as a go-to choice for welders seeking a modern solution that doesn't compromise on power or usability.

In conclusion, the Lincoln Electric IM822 combines advanced inverter technology, user-friendly operation, and robust welding capabilities, making it an excellent investment for professionals in the welding field. Whether for fabrication, repair, or maintenance applications, the IM822 stands out as a versatile and dependable welding solution.

Lincoln Electric IM822 manual Mild Steel Electrode, GAS Type

Models: IM822