Duty Cycle, Control of Welding Current, BB-4

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BB-4

OPERATION

BB-4

ENGINE BREAK-IN

WELDER OPERATION

Lincoln Electric selects high quality, heavy-duty indus-

WARNING

trial engines

for the portable welding machines

ELECTRIC SHOCK can kill.

offer. While

it is normal to see a small

amount

•

Do not touch electrically live parts or

crankcase oil consumption during initial operation,

•

electrode with skin or wet clothing.

excessive oil use, wetstacking (oil or tar like substance

Insulate yourself from work and ground.

at the exhaust port), or excessive smoke is not normal.

FUMES & GASES can be dangerous.

Larger machines with a capacity of 350 amperes and

• Keep your head out of the fumes.

• Use ventilation or exhaust to remove

higher, which are operated at low or no-load conditions

fumes from breathing zone.

for extended periods of time are especially susceptible

to the conditions described above. To accomplish suc-

WELDING SPARKS can cause fire or

cessful engine break-in, most diesel-powered equip-

ment needs only to be run at a reasonably heavy load

explosion.

within the rating of the welder for some period of time

• Keep flammable material away.

during the engineʼs early life. However, if the welder is

ARC RAYS can burn.

subjected to extensive light loading, occasional moder-

ate to heavy loading of the engine may sometimes be

• Wear eye, ear, and body protection.

necessary. Caution must be observed in correctly

loading a diesel/generator unit.

DUTY CYCLE

1. Connect the welder output studs to a suitable

The NEMA output rating of the Pipeliner® 200D is 200

resistive load bank. Note that any attempt to short

amperes at 28(1) arc volts on a 60% duty cycle. Duty

the output studs by connecting the welding leads

cycle is based on a ten minute period; thus, the welder

together, direct shorting of the output studs, or

can be loaded at rated output for six minutes out of

connecting the output leads to a length of steel will

every ten minute period.

result in catastrophic damage to the generator and

(1) The “Lincoln Plus” output rating at 60% duty cycle

voids the warranty.

is 200 amperes at 40 Volts.

2. Set the welder controls for an output current and

CONTROL OF WELDING CURRENT

voltage within the welder rating and duty cycle.

or duty cycle for any period of time will result in

CAUTION

Note that any attempt to exceed the welder rating

catastrophic damage to the generator and voids

DO NOT TURN THE “CURRENT RANGE SELEC-

the warranty.

check the

TOR” WHILE WELDING because the current may

3. Periodically shut off the engine and

arc between the contacts and damage the switch.

crankcase oil level.

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The “Current Range Selector” provides five overlap-

ping current ranges. The “Fine Current Adjustment”

adjusts the current from minimum to maximum within

each range. Open circuit voltage is also controlled by

the “Fine Current Adjustment” permitting control of the

arc characteristics.

A high open circuit voltage setting provides the soft “buttering” arc with the best resistance to pop-outs pre- ferred for most welding. To get this characteristic, set the “Current Range Selector” to the lowest setting that still provides the current you need and set the “Fine Current Adjustment” near maximum. For example: to obtain 175 amps and a soft arc, set the “Current Range Selector” to the 190-120 position and then adjust the “Fine Current Adjustment” for 175 amps.

Lincoln Electric 200 service manual Duty Cycle, Control of Welding Current, BB-4

Models: 200

BB-4

OPERATION

ENGINE BREAK-IN

WELDER OPERATION

DUTY CYCLE

CONTROL OF WELDING CURRENT

DO NOT TURN THE “CURRENT RANGE SELEC-

arc between the contacts and damage the switch.

PIPELINER® 200D PERKINS