Operating Instructions

B-2

OPERATION

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Read and understand the entire Operation Section prior to operating the machine.

SAFETY PRECAUTIONS

WARNING

ELECTRIC SHOCK can kill.

•Do not touch electrically live parts or electrode with skin or wet clothing.

•Insulate yourself from work or ground.

•Always wear dry insulating gloves.

FUMES AND GASES can be dangerous.

• Keep your head out of fumes.

• Use ventilation or exhaust to remove fumes from breathing zone.

WELDING SPARKS

can cause fire or explosion.

•Keep flammable material away.

•Do not weld on containers that have held combustibles.

ARC RAYS can burn.

• Wear eye, ear, and body protection.

Observe additional Safety Guidelines detailed in the beginning of this manual.

GENERAL DESCRIPTION

The K440 LN-7 GMA semiautomatic constant speed wire feeder is specifically equipped for gas metal arc welding using flux-cored Outershield electrodes and solid wire. The LN-7 GMA is also suitable for self- shielded flux-cored Innershield electrodes, submerged arc welding (if constant voltage is satisfactory), and other open arc welding. It has been factory assembled with the following features:

•Calibrated wire feed dial [75 to 700 in./min (1.9 to 17.8 m/min)].

•Factory installed gas solenoid valve and gas fittings.

•Wire drive uses a permanent magnet motor and includes tool-less “quick- release” idle roll pressure arm, outgoing guide tube and gun cable fastening.

•Optional factory installed water solenoid and fittings for use with water cooled welding guns.

The K567-1 LN-7 GMA 4-Roll is designed to provide the additional feeding force required when using gun cables over 15 ft (4.6 m) long or when the wire is pulled long distances (such as when bulk packages are used). Because the four-roll feeder has twice the contact surface, it can also help when feeding softer wires by delivering the same or more feeding force as the two-roll with less overall wire deformation. Wire size range, speed and features are the same as other LN-7 GMA models.

RECOMMENDED PROCESSES AND EQUIPMENT

The LN-7 GMA is recommended for use in MIG and Innershield welding applications with constant voltage power sources such as the Idealarc DC-250, 400, or 600, or CV types. The LN-7 is capable of feeding wires ranging from 0.023 in. through 1/16 in. (0.6 through

1.6mm) solid, 0.045 in. through 5/64 in. (1.2 through

2.0mm) Innershield, and 0.062 in. through 5/64 in.

(1.6 through 2.0 mm) Outershield electrodes.

Lincoln Electric SVM 106-A Operating Instructions, Safety Precautions, General Description

Models: SVM 106-A

OPERATION