Lincoln Electric LF-72/74 Manual De Usuario
LF-72/74 SINGLE/DUAL
Section E-1
Section E-1
Theory of Operation ...............................................................................................Section E
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
14 PIN
INPUT CABLE
RECEPTACLE
24/42 VAC
CONTROL BOARD
WIRE FEED
SPEED POT.
TRIGGER
INTERLOCK
2-STEP
COLD FEED
GAS PURGE
OPTIONAL
BURNBACK
TIMER
OPTIONAL
REMOTE
VOLTAGE
CONTROL
GAS
SOLENOID
3.75 AMP
OVERLOAD
PROTECTION
WIRE DRIVE
RECEPTACLE
WIRE
DRIVE
MOTOR
TACK
To Gun Trigger
FIGURE E.1 – LF-72/74 BLOCK LOGIC DIAGRAM