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F-61

TROUBLESHOOTING & REPAIR

F-61

 

 

WIRE SPEED ACCURACY TEST (Continued)

TEST PROCEDURE

Perform the following checks with the NA-5 connected to a Lincoln CV weld- ing power source according to the prop- er connection diagram. See the Installation Section of this manual.

1.Check to make sure the speedmeter calibration jumper is connected to the proper calibration pin for the head and drive roll system being used. See Table F.3

TABLE F.3

SPEEDMETER

HEAD

DRIVE ROLL

WIRE SIZE RANGE

RATED SPEED

 

CALIBRATION

RATIO

PART NUMBER

 

RANGE (IPM)

 

 

 

 

 

 

 

 

21*

21/1

S12778

Single .035 - .052 Solid

100

- 2070

 

 

 

S19113

Single .045 - .052 Cored

 

 

 

 

 

 

 

 

 

 

57F**

57/1

S12778

Single .035 - .052

40

- 778

 

57**

57/1

S12515

Single 1/16 - 3/32

38

- 762

 

 

 

 

 

 

 

 

95

95/1

S12514

Single 3/32 - 5/32

22

- 428

 

 

 

 

 

 

 

 

95S***

95/1

S12515

Single 1/16 - 3/32

23

- 456

 

 

 

S19113

Single .045 - .052 Cored

 

 

 

 

 

S13161-052

Twin .045 -.052

 

 

 

 

 

S13161-5/64

Twin 1/16 - 5/64

 

 

 

 

 

S14904 (Outer)

Twin 3/32

 

 

 

 

 

S14905 (Inner)

 

 

 

 

 

 

 

 

 

 

 

142

142/1

S12514

Single 3/32 - 7/32

15

- 289

 

 

 

 

 

 

 

 

142T***

142/1

S14904 (Outer)

Twin 5/64 - 1/8

15

- 300

 

 

 

S14905 (Inner)

 

 

 

 

 

 

 

 

 

 

 

*Present on HI -Speed NA-5 speedmeter board only. ** Early speedmeter pins were labeled 55F and 55, respectively.

***Early speedmeter PC boards did not include these calibration pins.

NA-5

Page 114
Image 114
Lincoln Electric NA-5NF, NA-5SF service manual Wire Speed Accuracy Test, Test Procedure

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.