soon as an arc is struck, the spot weld timer begins tim- ing out. The remote contactor control switch must re- main closed throughout the entire spot welding time in- terval. If the remote contactor control switch is released prior to the completion of the spot weld cycle, spot weld output ceases and the spot weld timer will reset for the next cycle. After completion of the spot weld cycle, the remote contactor control switch must be released to re-

set the spot weld timer.

Whenever the SPOT TIME switch is in the ON position, the AMPERAGE switch on the TIG-Unit can be placed in either the PANEL or REMOTE position to suit the de- sired application. However, the OUTPUT (CONTAC- TOR) switch on the welding power source must be in the REMOTE position.

SECTION 5 – SEQUENCE OF OPERATION

WARNING: ELECTRIC SHOCK can kill; MOVING PARTS can cause serious injury;

IMPROPER AIRFLOW AND EXPOSURE TO ENVIRONMENT can damage internal parts.

•Do not touch live electrical parts.

•Keep all covers and panels in place while operating.

Warranty is void if the Tig-Unit is operated with any portion of the outer enclosure removed.

ARC RAYS, SPARKS, AND HOT SURFACES can burn eyes and skin; NOISE can damage hearing.

•Wear correct eye, ear, and body protection.

FUMES AND GASES can seriously harm your health.

•Keep your head out of the fumes.

•Ventilate to keep from breathing fumes and gases.

•If ventilation is inadequate, use approved breathing device.

HOT METAL, SPATTER, AND SLAG can cause fire and burns.

•Watch for fire.

•Keep a fire extinguisher nearby, and know how to use it.

•Do not use near flammable material.

•Allow work and equipment to cool before handling.

MAGNETIC FIELDS FROM HIGH CUR- RENTS can affect pacemaker operation.

•Wearers should consult their doctor before going near arc welding, gouging, or spot welding operations.

See Arc Welding Safety Precautions in the welding power source Owner’s Manual for basic welding safety information.

5-1. GAS TUNGSTEN ARC WELDING

WARNING: Read and follow safety informa- tion at beginning of entire Section 5 before proceeding.

1.Make all necessary connections as instructed in Section 4.

IMPORTANT: For Gas Tungsten Arc Welding applica- tions, place both the AMPERAGE and the OUTPUT

(CONTACTOR) switches on the welding power source in the REMOTE 14 position.

2.Connect the shielding gas supply hose to the side of the GAS valve labeled IN under the front access door (see Section 3-11).

3.Connect the coolant supply hose to the side of the COOLANT valve labeled IN under the front access door (see Section 3-12).

4.If remote control of any type (amperage, contactor, etc.) is desired, connect the remote control to the REMOTE receptacle under the front access door on the TIG-Unit. (See Section 3-10 and Figure 4-1.)

5.Place the GAS/COOLANT switch in the ON posi- tion (see Section 4-3).

6.Place the HIGH FREQUENCY switch in the ON po- sition and rotate the HIGH FREQUENCY control to the desired position (see Sections 4-6 and 4-7).

7.Place the POLARITY switch in the desired position (see Section 4-2).

8.Place the AMPERAGE switch in the desired posi- tion. Rotate the AMPERAGE ADJUSTMENT con- trol to the desired position (see Section 4-1).

9.If the unit is equipped with a Pulser, and the arc puls- ing function is desired, place the PULSES switch in the ON position and adjust the Pulser controls as in- structed in Sections 4-9 thru 4-12. If arc pulsing is not desired, place the PULSES switch in the OFF position.

10.If the unit is equipped with an Electroslope, and the sloping function is desired, place the ELECTRO- SLOPE switch in the ON position and adjust the Electroslope controls as instructed in Sections 4-14 thru 4-18. If sloping is not desired, place the Electro- slope switch in the OFF position.

IMPORTANT: If an Electroslope is used, the AMPER- AGE switch on the TIG-Unit must be in the PANEL posi- tion.

11.Wear dry insulating gloves and clothing, and wear welding helmet with proper filter lens according to ANSI Z49.1.

12.Prepare for welding as follows:

a.Connect work clamp to clean, bare metal at workpiece.

OM-530 Page 19

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Miller Electric KC237900 Sequence of Operation, Fumes and Gases can seriously harm your health, GAS Tungsten ARC Welding
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KC237900 specifications

The Miller Electric KC237900 is a standout model in the realm of welding technology, specifically designed for versatility and efficiency. This machine embodies Miller's commitment to innovation and quality, making it a popular choice among professionals and hobbyists alike.

One of the main features of the KC237900 is its advanced inverter technology, which allows the unit to operate efficiently across a range of welding applications. This technology ensures that the welder maintains a stable arc for precision welding, even on thin materials. The inverter design also contributes to a lighter and more compact machine, enhancing portability without compromising on power.

The KC237900 supports multiple welding processes, including MIG, Flux-Cored, and Stick welding. This versatility makes it suitable for a variety of projects, from automotive repairs to intricate fabrication tasks. The machine’s ability to handle diverse materials, including steel, stainless steel, and aluminum, further expands its application scope.

Another characteristic of the Miller Electric KC237900 is its user-friendly interface. The digital display provides clear information on amperage and voltage settings, allowing welders to make quick adjustments as needed. Additionally, the intuitive control panel simplifies the operation, making it accessible to users with varying skill levels.

The arc technology integrated into the KC237900 contributes to its smooth and stable welding performance. The unit utilizes Miller's Auto-Set feature, which automatically adjusts parameters based on material thickness and type. This feature not only speeds up the setup process but also enhances the overall weld quality.

Durability is another key aspect of the KC237900. Built with robust materials, the machine is designed to withstand the rigors of job site conditions. Its protective features, such as thermal overload protection, ensure that the unit operates safely and efficiently.

In conclusion, the Miller Electric KC237900 is a high-performance welding machine that combines advanced inverter technology, versatility, and user-friendly features. With its ability to handle multiple welding processes and materials, along with its focus on reliability and ease of use, it stands out as an excellent choice for both experienced welders and newcomers to the trade. Whether for professional use or personal projects, the KC237900 delivers the performance and quality that Miller Electric is known for.
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