Lincoln Electric IM812-A Operation, General Description, Recommended Processes and Equipment

B-1 OPERATION B-1

SAFETY PRECAUTIONS

READ AND UNDERSTAND ENTIRE SECTION

BEFORE OPERATING MACHINE

The LN-35 provides constant wire feed speed for use with constant voltage (CV) power sources, and arc- sensing wire feed speed for use with constant current

(CC)(formerly variable voltage) power sources. Wire speed is presettable on a calibrated dial.

WARNING

ELECTRIC SHOCK can kill.

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

•Insulate yourself from work and ground.

•Always wear dry insulat- ing gloves.

FUMES AND GASSES 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.

ARC RAYS can burn.

• Wear eye, ear and body protection.

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GENERAL DESCRIPTION

The LN-35 is a semiautomatic wire feeder designed for “across-the-arc” operation without a control cable on most any DC welding power source. Simply connect the LN-35 to the electrode cable, clip it to Work and it is ready to weld, using up to 60 lb. coils or spools.

RECOMMENDED PROCESSES AND EQUIPMENT

When combined with the quality drive roll kits and accessories available for use with the LN-35, a versatile welding system can be provided to meet the specific needs of Innershield or submerged arc welding applications within the wire feed capabilities of the LN-35.

The power sources recommended for use with the LN-35 include the DC-250, -400, -600, CV-400 and R3S type transformer machines, and the SAM-400, -650 engine welders, as well as the SA-200, -250 or SAE-300, -400 with CV Adapter.

WELDING CAPABILITY

The LN-35 will handle up to 500 Amp 60% duty cycle welding currents.

LN-35 INSTRUMENTS AND CONTROLS

“ELECTRODE POLARITY” SWITCH

The polarity switch is located on the center panel inside the LN-35 case.

Set the switch to the same polarity as the electrode lead connection to the power source. If the switch is not set for the correct polarity, the wire feeder will not operate.

WIRE FEED MODE SWITCH

The CV-VV (CC) Wire Feed Mode switch is located on the center panel inside the LN-35 case.

The forward “CV” switch position provides constant wire feed speed mode for use with constant voltage (CV) welding power sources.

The backward “VV (CC)” switch position provides arc- sensing wire feed speed mode for use with constant current (formerly variable voltage) welding power sources.

WIRE FEED SPEED CONTROL

This control sets the feed speed of the wire feeder. Turn the knob to the left for slower speeds and to the right for higher speeds. The control is calibrated. The nameplate shows the wire speed for the given setting of the control.

LN-35