Lincoln Electric SVM207-A service manual Theory of Operation, General Description

E-2

THEORY OF OPERATION

E-2

TOC

TOC

FIGURE E.2 - ENGINE COMPONENTS AND OPERATION

SWITCH

RANGE

Section

Master

254

TOROID*

S2

E

ELECTRODE

AC

to

to

TERMINAL

REACTOR

OUTPUT +

CHOKE

POLARITY

Return

Return

--

WORK

AC BRIDGE

SWITCH

FUEL

W2

C1 WAC

W1

TERMINAL

STARTER

SHUTOFF

SOLENOID

SOLENOID

WELD WINDINGS

STARTER

MECHANICAL

AUXILIARY

WINDINGS

ROTAT ION

ENGINE

SLIP

ROTOR

STATOR

Z

Y

3

FLYWHEEL ALTERNATOR/

RINGS

5

VOLTAGE REGULATOR

TOC

TOC

SOLENOID

7

EXCITER

9

6

WINDING

X

Section

Master

IDLER

CONTROL

3

DIODE

3 6 X

TOROID*

4

OIL

1

PRESSURE

ENGINE

SWITCH

FLASHING

to

to

SWITCH*

2

HOUR

Return

Return

+

-

FIELD

Z X Y

CAPACITOR

METER

BATTERY

OUTPUT

120 & 230 VOLT

480 VOLT 3 PHASE

CONTROL

BREAKERS AND

BREAKER AND

RECEPTACLES

RECEPTACLE

								* Lead 254 - 1 turn through the toroid
							PRINTED CIRCUIT	Leads 3 & 6 - two turns through the toroid in opposite directions.
							BOARD	Lead X passes though the toroid in the same direction as lead 6
TOC	TOC	GENERAL DESCRIPTION
								When the Engine control Switch is released it returns to
Section	Master	The RANGER® 3 PHASE is a twin cylinder, gasoline
		tor. It is capable of AC or DC Stick (SMAW) or TIG						the High Idle position.
		driven, multiprocess arc welder and AC power genera-
to	to	(GTAW)	welding	and	CV Wire		welding, either	When the switch is placed in the Auto Idle position, after
Return	Return	Innershield® or MIG		(GMAW). The AC power genera-				a delay of approximately 10 seconds, the Idler Solenoid
		tor is capable of providing 10,500 Watts continuous, 3						will energize and the engine will drop to low speed.
		Phase 60 Hz. AC 480 volt power or 9500 Watts contin-						Upon striking an arc or drawing of current from any of
		uous, Single Phase 60 Hz. AC 120/240 volt power.						the Auxiliary Power receptcles, the solenoid will release
								and the engine will go to the high idle speed. Once the
		ENGINE COMPONENTS AND OPERATION						load is removed, and after a 10 second delay, it will
								return to the low idle condition.
		The Engine Control Switch is used to start and stop the						The Hour Meter runs whenever the oil pressure switch
		engine and to select the idle mode (High Idle or Auto
								is closed to help keep track of running time for mainte-
		Idle). The Fuel Shutoff Solenoid is activated at first by
								nance concerns.
TOC	TOC	the Engine Control Switch. Then, as oil pressure builds
		up it is held in by the output of the voltage regulator						Turning the Engine Control Switch to the ‘OFF’ Position
Sectionto	Masterto	through	the oil pressure		switch. If		the oil pressure
								will shut down the machine.
		switch opens for any reason, the Fuel Solenoid will
		release and the engine will shut down.
Return	Return					NOTE: Unshaded areas of Block Logic
							Diagram are the subject of discussion
							RANGER® 3 PHASE