Lincoln Electric LN-15 WIRE FEEDER SVM166-A - Manual (Page 33)

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LN-15
Section E-1 Section E-1
Theory of Operation ...............................................................................................Section E
General Description ......................................................................................................E-2
Input Power...................................................................................................................E-2
Trigger & Control Circuits..............................................................................................E-3
Wirefeed Speed Control & Feedback ...........................................................................E-4
Display Board ...............................................................................................................E-5
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
CONTACTOR ELECTRODE
INPUT VOLTAGE
TOROID
ASSEMBLY
FULL
WAVE
BRIDGE
WORK
SENSING
LEAD
ON/OFF
SWITCH
MOV
BOOST
POWER
SUPPLY
BOARD
FEED HEAD
BOARD SUPPLY
DRIVE MOTOR
SUPPLY
"WORK" VOLTAGE FEEDBACK #21
GAS
SOLENOID
"ELECTRODE"
FEEDBACK
VOLTAGE #67
FEED
PLATE
M
O
T
O
R
HALL
EFFECT
MODULE
RPM FEEDBACK
ARMATURE
WELDING GUN
DISPLAY
BOARD COLD
INCH
SWITCH WIRE
FEED
SPEED
CONTROL
TRIGGER
INPUT &
PROCEDURE TRIGGER
INTERLOCK
SWITCH
SPI COMMUNICATIONS
SHIELDED CABLE
FEED HEAD
CONTROL BOARD
LN-15 WIRE FEEDER
DISPLAY BOARD
FIGURE E.1 – LN-15 BLOCK LOGIC DIAGRAM