Manuals / Lincoln Electric / Power Tools / Welding System

Lincoln Electric NA-5SF, NA-5NF service manual Setup Instructions, Auto TAB

Models: NA-5S NA-5N NA-5SF NA-5NF

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OPERATING INSTRUCTIONS

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SETUP INSTRUCTIONS

Use the following steps to set up the NA-5 welding system prior to welding:

1.If using a multi-process power source (SAM, DC-400, DC-600, DC-1000, OR DC-1500 type), make con- nections and settings per the power source connection diagram (Figures A.8 to A.14) for the process being used.

AUTO TAB

When using the NA-5 with the DC- 400 or CV-400 power source, the auto tab jumper on the NA-5 voltage PC board must be connected in order for the inch down circuit to function. When the auto tab jumper is connected, the cold starting feature of the NA-5 is disabled and only the hot starting technique can be used. If the cold start technique is to be used, the optional Diode must be installed on the DC-400 or CV-400.

2.Set the power source and NA-5 circuit polarity per information on Electrode Polarity in Section A, Installation.

3.Depending on the procedures and applications, decide:

a.The means of arc striking and whether to start the travel with the “Start” button or the arc.

b.Whether the initial bead size or penetration requires use of the optional “Start Controls.”

See the Starting and Stopping Sequences section.

4.Depending upon the procedures and applications:

a.Select the arc and travel stopping sequence. See the Starting and Stopping Sequences section.

b.Decide if the control of the ending bead size or crater fill requires the use of optional “Crater Controls”. See the Starting and Stopping Sequences section.

5.Set the head position relative to the work as required for the fixture, application, and procedures. See IM305 Sec. T3.2.3.

6.Rotate the wire straightener, if used, until the top of the straightener faces the wire reel. This is required for smooth feeding of the electrode into the straightener.

7.Refer to the instructions for the wire contact assembly being used. See IM305 Sec. T2.2.6, T2.2.7, T2.5.3, or T2.5.4.

8.The mount for standard 50 and 60 lb (22.7 and 27.2 kg) electrode coils includes a two-position brake assembly. Generally the brake should be at the inner position (nearest to the wire reel shaft) for wire feed speeds below 400 in./min (10 m/min). It should be at the outer position for faster wire speeds. To adjust the brake position, remove the wire reel. Pull the cotter pin that holds the brake shoe to the arm, move the shoe, and replace the cotter pin. Do not bend the cotter pin — it is held in place by a friction fit.

9.Load the wire reel per IM305 Sec. T3.2.2 or install the Speed-Feed drum or reel per Sec. T2.5.7-A or -B.

10.Straighten the first 6 in. (152.4 mm) of electrode and push it through the wire straightener to the drive rolls. To use the cored wire straightener, remove the knurled nut at the top and feed the wire through the nut, down through the straightener, and into the drive rolls. Screw the nut back onto the straightener. Feed the wire through the nozzle tip and adjust the straightener for optimum straightness. With wire contact assemblies, except the K231, adjust until the electrode is straight as it comes out of the nozzle. Do not completely straighten the wire when using the K231 contact nozzle because the nozzle relies on the small curvature of the electode for proper electrical contact within the contact tip.

NA-5

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Lincoln Electric NA-5SF, NA-5NF service manual Setup Instructions, Auto TAB, See the Starting and Stopping Sequences section
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NA-5S, NA-5N, NA-5SF, NA-5NF specifications

The Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S are advanced welding helmets that are pivotal in enhancing the safety and efficiency of welders in various applications. These models are designed to provide exceptional protection and visibility, making them indispensable tools in the welding industry.

One of the main features of the NA-5 series is the auto-darkening filter technology. This feature allows the helmet to automatically adjust its shade based on the intensity of the arc. As the welder strikes an arc, the lens darkens instantaneously, shielding the eyes from harmful rays generated during the welding process. This functionality not only ensures safety but also enhances productivity, as welders do not need to manually flip the helmet up and down.

The helmets are equipped with a wide viewing area that allows for better visibility and precision while working. With a large lens, welders can easily monitor their work and surrounding environment, minimizing the risk of accidents. Additionally, the lightweight design of the NA-5NF, NA-5SF, NA-5N, and NA-5S provides comfort during extended periods of use, reducing neck strain and fatigue.

The NA-5 series is also well-regarded for its durability. Constructed from impact-resistant materials, these helmets can withstand the rigors of demanding work environments. This durability extends the lifespan of the helmet, making it a cost-effective investment for both professional and hobbyist welders.

Another notable characteristic is the adjustable sensitivity and delay settings found in certain models. These settings allow the user to customize the helmet based on their specific welding conditions. For instance, a welder can increase sensitivity for low-amperage tasks or adjust the delay to allow for a smoother transition from dark to light after completing a weld.

Furthermore, the helmets come with a reliable battery life, ensuring that they can be used for long periods without interruption. Some models also feature solar assist functionality, which helps recharge the auto-darkening filter, enhancing their overall efficiency.

In summary, the Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S welding helmets represent a significant advancement in personal protective equipment for welders. Their combination of auto-darkening technology, wide viewing area, lightweight design, durability, and customizable settings makes them an excellent choice for anyone engaged in welding tasks. With these helmets, users can achieve greater safety and efficiency in their work, enabling them to focus on their craft with peace of mind.