Lincoln-electric POWER ARC 5000 User Manual download pdf (Page 27)

B-11

OPERATION

B-11

POWER ARC 5000

The Power-Arc provides excellent weld output charac-

teristics when used in combination with Lincoln AC

electrodes. Other AC electrodes may also be used.

Follow the settings listed in Table B.4 “Welding

Applications/Electrode Selection Guide” found on the

nameplate of the machine.

ARC RAYS can burn.

• When using an open arc process,

it is necessary to use correct eye,

head and body protection.

WARNING

POWER ARC 5000

Arc Welding power

source and controls

Electrode Holder

Electrode

Arc

Work Clamp

Work Cable

Electrode Cable

Work

Stick Welding

Learning To Stick Weld

The serviceability of a product or structure utilizing this

type of information is and must be the sole responsi-

bility of the builder/user. Many variables beyond the

control of The Lincoln Electric Company affect the

results obtained in applying this type of information.

These variables include, but are not limited to, welding

procedure, plate chemistry and temperature, weld-

ment design, fabrication methods and service require-

ments.

No one can learn to weld simply by reading about it.

Skill comes only with practice. The following pages

will help the inexperienced welder understand welding

and develop his skill. For more detailed information,

order a copy of the book “New Lessons in Arc

Welding.”

(See Book Division section at rear of manual).

The operator’s knowledge of arc welding must go

beyond the arc itself. He must know how to control the

arc, and this requires a knowledge of the welding cir-

cuit and the equipment that provides the electric cur-

rent used in the arc. Figure B.3 is a diagram of the

welding circuit. The circuit begins where the electrode

cable is attached to the welding machine and ends

where the work cable cable is attached to the

machine. Current flows through the electrode cable to

the electrode holder, through the electrode holder to

the electrode and across the arc. On the work side of

the arc, the current flows through base metal to the

work cable and back to the welding machine. The cir-

cuit must be complete for the current to flow. To weld,

the work clamp must be tightly connected to clean

base metal. Remove paint, rust,etc. as necessary to

get a good connection. Connect the work clamp as

close as possible to the area you wish to weld. Avoid

allowing the welding circuit to pass through hinges,

bearings, electronic components or similar devices

that can be damaged.

Figure B.3 - The welding circuit for shielded metal

arc welding.

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Lincoln-electric POWER ARC 5000 User Manual Page 27

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