BB-2

OPERATION

BB-2

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SAFETY PRECAUTIONS

Read this entire section of operating instructions before operating the machine.

WARNING

ELECTRIC SHOCK can kill.

Unless using cold feed feature, when feeding with the gun trigger, the elec- trode and drive mechanism are always electrically energized and could remain energized several sec- onds after welding ceases.

Do not touch electrically live parts or electrodes with your skin or wet clothing.

Insulate yourself from the work and ground.

Always wear dry insulating gloves.

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ONLY QUALIFIED PERSONS SHOULD INSTALL, USE OR SERVICE THIS EQUIPMENT. READ AND FOLLOW THE MANUFACTURER’S INSTRUCTIONS, EMPLOYER’S SAFETY PRACTICES AND MATERI- AL SAFETY DATA SHEETS (MSDS) FOR CONSUM- ABLES.

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READ THIS WARNING, PROTECT YOURSELF & OTHERS.

FUMES AND GASES can be dangerous.

Keep your head out of fumes.

Use ventilation or exhaust at the arc, or both, to keep fumes and gases

from your breathing zone and gener- al area.

WELDING SPARKS can cause fire or explosion.

• Do not weld near flammable material.

Do not weld on containers which have held flammable material.

ARC RAYS can burn.

• Wear eye, ear, and body protection.

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Observe additional guidelines detailed in the begin- ning of this manual.

GRAPHIC SYMBOLS THAT APPEAR ON THIS MACHINE OR IN THIS MANUAL

COLD FEED

POSITIVE OUTPUT

NEGATIVE OUTPUT

PROTECTIVE

GROUND

WARNING OR

CAUTION

DANGEROUS

VOLTAGE

SHOCK

HAZARD

WELDING

FUMES

EXPLOSION

GAS INPUT

WORK

CONNECTION

COMMON WELDING ABBREVIATIONS

WFS

• Wire Feed Speed

CV

Constant Voltage

GMAW (MIG)

• Gas Metal Arc Welding

FCAW (Innershield or Outershield)

Flux Core Arc Welding

LF-72/74

Page 66
Image 66
Lincoln Electric LF-72/74 service manual BB-2, Fcaw Innershield or Outershield