Lincoln Electric 11937 Service Manual page 10

E-2
CIRCUIT
BREAKER
INPUT
RECEPTACLE
GENERAL DESCRIPTION
The 180 AMP COMPACT WIRE WELDERS that are
covered by this manual are Constant Voltage (CV)
DC welders that can be used for MIG or Flux-Core
process. They can use either 208 or 230 VAC input
voltage and are rated for 130 amps, 17 / 20 volts, at a
30% duty cycle.
All are equipped with a 4-pin trigger connector to
allow operation of the included MAGNUM 100L gun or
an optional MAGNUM 100SG spool gun for Aluminum
MIG Welding.
THEORY OF OPERATION
FIGURE E.2 - GENERAL DESCRIPTION
ARC
TRIGGER
VOLTAGE
RECEPTACLE
CONTROL
CONTROL
BOARD
LINE
SWITCH
FAN
MOTOR
MAIN
TRANSFORMER
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion
WIRE FEEDER WELDER (180 MODEL)
WIRE
SPEED
CONTROL
GAS
SOLENOID
WIRE
FEED
MOTOR
VOLTAGE FEEDBACK &
MOTOR POWER
+
CHOKE
MAIN
BRIDGE
E-2
+
OUTPUT
TERMINALS
-