B-14

LEARNING TO WELD

B-14

 

 

 

MACHINE SET UP FOR THE GMAW (MIG) PROCESS

1.See PROCESS GUIDELINES in the OPERATION section for selection of welding wire and shielding gas, and for range of metal thicknesses that can be welded.

2.See the Application Guide on the inside of wire feed section door for information on setting the controls.

3.Set the “Voltage” and “Wire Speed” controls to the settings suggested on the Application Guide for the welding wire and base metal thickness being used. The voltage control is marked “V” and the wire feed speed is marked ‘’olo.’’

4.Check that the polarity is correct for the welding wire being used. Set the polarity for DC(+) when welding with the GMAW (MIG) process. See Work Cable Installation in the INSTALLATION section for instructions for changing polarity.

5.Check that the gas nozzle and proper size liner and contact tip are being used and that the gas supply is turned on. If adjustable, set for 15 to 20 cubic feet per hour (7 to 10 l/min.) under normal conditions, increase to as high as 35 CFH (17 I/min.) under drafty (slightly windy) conditions.

6.Connect work clamp to metal to be welded. Work clamp must make good electrical contact to the work piece. The work piece must also be grounded as stated in the “Arc Welding Safety Precautions” at the beginning of this manual.

WELDING TECHNIQUES FOR THE GMAW (MIG) PROCESS

Four simple manipulations are of prime importance when welding. With complete mastery of the four, welding will be easy. They are as follows:

1.The Correct Welding Position

Figure B.23 illustrates the correct welding position for right handed people. (For left handed people, it is the opposite.)

When GMAW (MIG) welding on sheet metal, it is important to use the “forehand” push technique.

Hold the gun (of the gun and cable assembly) in your right hand and hold the shield with your left hand. (Left handers simply do the opposite.)

FIGURE B.23

When using the GMAW process on light gauge mater- ial, weld from right to left (if you are right handed). This results in a colder weld and has less tendency for burn through.

2. The Correct Way To Strike An Arc

WARNING

ARC RAYS can burn eyes and skin.

When using an open arc process, it Is necessary to use correct eye, head and body protection.

Protect yourself and others, read “ARC RAYS can burn” at the front of this manual.

1.Be sure the work clamp makes good electrical con- tact to the work.

2.Position gun over joint. End of wire may be lightly touching the work.

3.Position face shield to protect face and eyes, close gun trigger, and begin welding. Hold the gun so that the contact tip to work distance is about 3/8 to 1/2 inch (10 – 12 mm).

4.To stop welding, release the gun trigger and pull the gun away from the work after the arc goes out.

5.A ball may form at the tip end of the wire after welding. For easier restrikes, the ball may be removed by feeding out a few inches of wire and cutting off the end of the wire with wire cutters.

6.When no more welding is to be done, close the valve on the gas cylinder, momentarily operate the gun trigger to release gas pressure, then turn off the machine.

PRO 100

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Lincoln Electric PRO 100 manual Machine SET UP for the Gmaw MIG Process, Welding Techniques for the Gmaw MIG Process
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PRO 100 specifications

The Lincoln Electric PRO 100 is a compact and versatile multi-process welder designed to meet the needs of both novice and experienced welders. Known for its robust build quality and advanced features, the PRO 100 is engineered for tasks ranging from light fabrication to heavy-duty welding projects.

One of the standout features of the PRO 100 is its multi-process capability. It can seamlessly switch between MIG, Stick, and TIG welding, allowing users to tackle various materials including aluminum, stainless steel, and mild steel with ease. This versatility makes it an essential tool for welding professionals and hobbyists alike, enhancing productivity and efficiency on the job.

The machine is equipped with Lincoln Electric's unique Auto-Set technology, which simplifies the setup process for users. By automatically adjusting the voltage and wire feed speed based on the selected material and thickness, it enables welders to achieve optimal results without extensive experience or technical knowledge. This feature not only saves time but also reduces the likelihood of mistakes, making it ideal for beginners.

Powering the PRO 100 is a reliable inverter-based technology that ensures smooth and consistent arcs. This technology not only enhances performance but also improves energy efficiency, making the machine more cost-effective in the long run. The compact design allows for portability, making it convenient for job sites where space may be limited.

The PRO 100 also boasts several safety features that protect both the user and the machine. It includes an overload protection system that prevents overheating, ensuring the longevity of the welder. Additionally, the welder features a rugged construction that can withstand demanding work environments, further enhancing its durability.

Furthermore, the PRO 100 is designed for user comfort and control. The intuitive interface and large color display provide clear readability of settings and parameters, allowing for quick adjustments. The adjustable wire feed speed and voltage settings give welders the flexibility to customize their welding experience.

In summary, the Lincoln Electric PRO 100 stands out in the crowd of welding machines for its multi-process capabilities, Auto-Set technology, and inverter-based power system. Its combination of portability, durability, and user-friendly features makes it an excellent choice for a wide range of welding applications, whether at home, in the workshop, or on the field. This well-rounded welder can help elevate the quality of the work for both the novice and the seasoned professional.
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