Operating Schematic - Lincoln Electric NA-3 Service Manual

G-4
Operating Schematic (NA-3)
7CR
SHUNT
WORK LEAD TO
WORK
POWER SOURCE
21
21 517
67
- + +
-
VM AM
5CR
CONTACTOR RELAY
2
3CR
4
NOT PRESENT ON MODELS WITH
3-CONTACT TRAVEL RECEPTACLE
GND
CONTROL POWER SWITCH
31 531
S1
531
TRAVEL
RECEPTACLE
7CR
HAND
FLUX OR
25
WATER
0FF
SOLENOID
532 S2
666 RECEPTACLE
AUTO
TRAVEL
87
SWITCH
1CR
625
2CR
6CR
532
32
S1
FOR CONTROL P.C. BOARD L5224-5 OR HIGHER USE L8939 SCHEMATIC
FOR COMPONENT VALUES AND CIRCUIT CONNECTIONS.
CONTROL CIRCUIT
C101 .47 MFD R101 40 OHM 12 W Q101 2N5655
C102 50 MFD R102 68K OHM Q102 MJ3029
C103 .047 MFD R104 10K OHM 2 W Q103 2N4123
C104 .047 MFD R105 27K OHM Q104 2N4123
C106 .047 MFD R106 4.7K OHM Q105 2N4123
C107 .1 MFD R107 15K OHM Q106 2N5816
C108 4.7 MFD R108 22K OHM Q107 2N5816
C110 1 MFD R109 10K OHM Q108 2N4123
C113 .15 MFD R110 1.5K OHM
C114 .15 MFD R111 5K OHM TRIMMER
C116 .047 MFD R112 4.7K OHM
C117 .02 MFD R113 33K OHM QU101 2N6027
C118 .02 MFD R114 10K OHM QU103 UJT
.02 MFD R115 100 OHM
C119
.02 MFD 47 OHM
C120 R117
.02 MFD 6.8K OHM
C121 R118
6.8K OHM
R119
680 OHM
R120 LED1A
RED
2.7K OHM
R121 LED1B
LIGHT
47K OHM
D101 16 A R122 LED1C
EMITTING
D102 16 A R123 100 OHM LED1D
DIODE
D103 16 A R124 100 OHM LED1E
D104 R125 10K OHM
THRU 1 A R126 680 OHM
D114 R127 4.7K OHM
R128 47K OHM SCR101 8A 600V
R129 47K OHM SCR102 8A 600V
DZ101 25V R131 10K OHM 2 W SCR103 16A 400V
DZ102 3V R132 10K OHM SCR104 16A 400V
TP101 TRANSIENT PROTECTOR PT101 PULSE TRANSFORMER
F101 1/2A SLOW BLOW FUSE PT104 PULSE TRANSFORMER
F102 3/10A FUSE PT105 PULSE TRANSFORMER
12
F103 3/10A FUSE
12
510A
510
ELECTRODE LEAD
TO POWER SOURCE
67
R306
D301
D302
C301 +
R308
D303
LED
QU301
DZ303
3B
C302
510A DZ306
PT301
1 OCI301
110V
2
C304
D105 D104
R4
510 610
5 AMP CIRCUIT BREAKER
531A
D111
R1 631
Q101
531A
Q102
DZ101
PT105 1/64 Ÿ]
D113
C114
TP101 541
R105
SCR101
SCR102 C103 C104
C101
PT PT
C113
101 101
PT
104
627
D107
C102
LED
LED 1C
SCR103
SCR104
1E
D103
626
C121
LED 1D
F101 QU101
WIRE FEED
WIRE FEED MOTOR
MOTOR FIELD
D101 C107 D102
PT
101
Q104 Q104
C110
C106 C107
VARIABLE VOLTAGE CIRCUIT
FOR VARIABLE VOLTAGE P.C. BOARDS L5394-2 OR HIGHER
USE M16966 SCHEMATIC FOR COMPONENT VALUES AND
CIRCUIT CONNECTIONS.
*
R308
C301 2 MFD 10K OHM TRIMMER
OPTIONAL CIRCUIT
C302 .1 MFD R309 15 OHM
C303 .01 MFD R310 75 OHM
C401 18 MFD
C304 .02 MFD R311 68 OHM
C402 .02 MFD
C305 .01 MFD R312 5.6K OHM 2 W
C403 .02 MFD
C306 2 MFD R313 6.8K OHM
C404 .02 MFD
C307
.47 MFD R314 10K OHM
C405 .02 MFD (CRATER
C308 .22 MFD R315 1K OHM 12 W
CKT. ONLY)
C309
.02 MFD R316 33K OHM
C310 .01 MFD R317 10K OHM
CR401 DPST N.O. 24 VDC
R318 560 OHM
R319
2.7M OHM
D401
D301 R320 100 OHM
THRU 1A
1 A
THRU
D405
D304 LED3A RED LIGHT
LED3B EMITTING DIODE
LED4A RED LIGHT
D305
LED4B EMITTING DIODE
1 A
THRU
D312 OC1301 OPTO-ISOLATOR
R401 1.5K OHM
OC1302 OPTO-ISOLATOR
R402 6.8K OHM
R403 100K OHM 2 W
DZ301 5.1V
R404 4.7K OHM
DZ302 10V Q301
2N4123
R405 2.7K OHM
DZ303 25V Q302 2N5815
R406 1.5K OHM
DZ304 15V Q303
MPS A13
R407 1K OHM
DZ305 3V
R408 10K OHM 2 W
DZ306 3V
QU301 UJT
R409 5K OHM 2 W
R410 50K OHM TRIMMER
TP301 TRANSIENT PROTECTOR
R411 470 OHM
R301 47K OHM TP302 TRANSIENT PROTECTOR
R412 6.8K OHM
R302 3.3K OHM 2 W
R303 6.8K OHM PT301 PULSE TRANSFORMER
Q401 2N4123
R304 68K OHM
QU401 2N6027
R305 100K OHM S301 SPDT TOGGLE SWITCH
R306 4.7K OHM 2 W
X401 QUAD 2 INPUT NANDGATE
R307 100 OHM
T301 24V TRANSFORMER
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTRICAL DIAGRAMS
21
525 (24V)
VARIABLE VOLTAGE
BOARD (NA-3S ONLY)
D307
532
D306
C303
T301
4 1
Q302
24
START
DZ304 PT301
531A
VAC
5 3
C305
D311
TP
D309 562
301
OCI301
6
D308
D312
LED 3A
C309
S301
VV
TP
CV 5 4
302
D310 DZ301
C310
Q301
4 1
6 DZ305
Q303
5 OCI302 2
L H
21
C306 +
D304
C308
N.E.
C307 +
D305
539
592
528
525 (24V)
D106
635
629
D401
D108 D403
D404
Q105
D402
WIRE
C108
CR
D112 FEED LED
401
SPEED
C207
LED
1A
D109
D114
593
Q401
Q103
C404
S3
DZ102
INCH
539
D110 UP
LED
SWITCH *
1B
586
539
539S
F103 539
539S
A.N.S.I. ELECTRICAL SYMBOLS PER E1537.
N.A. TO OPERATE UNIT WITHOUT VARIABLE VOLTAGE BOARD JUMPER 637 TO 539 AND 635 TO 636.
N.B. TO OPERATE UNIT WITHOUT OPTIONAL START BOARD JUMPER 583 (S) AND 584 (S)
N.C. TO OPERATE UNIT WITHOUT CRATER FILL BOARD JUMPER 583 (C) AND 584 (C)
N.D. X201 THRU X207 AND X401 - PIN 7 CONNECTED TO 539 - PIN 14 CONNECTED TO 515
FOR START P.C. BOARD L9917-1 AND UP USE
N.E. WHEN CONTROLS ARE USED WITH R3S POWER SOURCES OF THE TYPE WHICH USES TAPS CONNECTED
M17938 SCHEMATIC FOR COMPONENT VALUES
WITH A TRIANGLE PLATE FOR MAJOR VOLTAGE ADJUSTMENTS, JUMPER TO BE CONNECTED TO
AND CIRCUIT CONNECTIONS.
PIN "L". FOR ALL OTHER POWER SOURCES JUMPER TO BE CONNECTED TO PIN "H".
FOR CRATER FILL P.C. BOARDS L5222-2 AND UP,
USE M17939 SCHEMATIC FOR COMPONENT VALUES N.F. THESE JUMPERS ARE NOT PRESENT ON LOGIC P.C. BOARDS WITH DIP SWITCHES.
AND CIRCUIT CONNECTIONS.
COMPONENTS NOT ON P.C. BOARD
R1 2 OHM 50 W NOTE: SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING
R2 10K OHM 2 W POWER SOURCE THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT
OUTPUT CONTROL
COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE NUMBER.
R3 5K OHM 2 W WIRE FEED SPEED CONTROL
R4 250 OHM 25 W
S1 DPST CONTROL POWER SWITCH
S2 SPDT TRAVEL SWITCH
S3 SPST INCH UP SWITCH
METHODS OF TRAVEL
S4 SPST INCH DOWN SWITCH
FOR EARLIER LOGIC P.C.
S5 SPST START SWITCH
BOARDS WITH JUMPERS
S6 SPST STOP SWITCH
CONNECT
START/STOP WITH SWITCHES LEAD #691 to P6
LEAD #692 to P5
CONNECT
START/STOP WITH CURRENT LEAD #691 to P6
1CR SPST 110 VDC COIL
LEAD #692 to P7
2CR SPST 110 VDC COIL
3CR SPST 110 VDC COIL CONNECT
START WITH CURRENT
4CR REED SWITCH ACTUATED BY LEAD #691 to P5
STOP WITH STOP SWITCH
LEAD #692 to P7
WELDING CURRENT
5CR OPTIONAL - SPST, 110 VDC COIL
START WITH START SWITCH CONNECT
ACTUATED BY 4 CR CIRCUIT
STOP AFTER CRATER FILL LEAD #691 to P8
(CRATER FILL BOARD INSTALLED) LEAD #692 to P9
OPTIONAL 6CR SOLID STATE RELAY FOR
LINC-FILL LINC-FILL STARTING
STARTING RELAY OPERATION
RELAY KIT 7CR LINC-FILL STARTING
RELAY
562
LOGIC BOARD
694 P10
P8
691 P6
525 P5
692 P7
N.F.
P9
582
P3
581
693 P1
STOP 690 P4
P2
539S
637
START BOARD CRATER FILL BOARD
75
75
75
575
576
76
76 CR401
CR401
76
77
77
77
528
636
592 583(C) 586 587
515 515 584(S) 583(S)
515
635
525 (24V)
629
X401
D401
D403
12
11 583(S)
R404 R404
D
13 D404
LED LED
D402
4B
4B
TIME TIME
WIRE
DELAY X401 DELAY
CR
FEED LED
5
401
SPEED
4 B
4A C403 6 4A C403
X401
2
1 A
QU401 3 QU401
R405 Q401 R405
C402
X401 592
9
C401 C401
D405 10 C C404 D405
8
539
S4
OPTIONAL START INCH DOWN *
BOARD SWITCH
OPTIONAL CRATER
FILL BOARD
539S
1 2 3 4
SAMPLE SWITCH
SWITCH POSITION 1 IS UP
SWITCH POSITION 2 IS DOWN
FOR LOGIC P.C. BOARDS WITH
SWITCH POSITIONS 3 AND 4 ARE NOT APPLICABLE
DIP SWITCHES
METHODS OF BURNBACK
1 2 3 4 1 2 3 4
FOR EARLIER LOGIC P.C. FOR LOGIC P.C. BOARDS WITH
BOARDS WITH JUMPERS DIP SWITCHES
SWITCH #1 SWITCH #2
USE OF CRATER FILL BOARD
1 2 3 4 1 2 3 4 CONNECT 1 2 3 4 1 2 3 4
WIRE FEED STOP & CONTRACTOR
LEAD #693 TO P3 CRATER BOARD INSTALLED?
DELAY LEAD #690 TO P4
SWITCH #1 SWITCH #2 SWITCH #1 SWITCH #2
1 2 3 4 1 2 3 4 CONNECT 1 2 3 4 1 2 3 4 YES
LEAD #693 TO P1 (REMOVE JUMPER CONNECTOR
INCH UP & CONTACTOR DELAY
"B" FROM 584(c) TO 583(c))
LEAD #690 TO P4
SWITCH #1 SWITCH #2 SWITCH #1 SWITCH #2
1 2 3 4 1 2 3 4 CONNECT 1 2 3 4 1 2 3 4 NO
INCH UP & NO CONTACTOR LEAD #693 TO P1 (INSTALL JUMPER CONNECTOR
DELAY "B" FROM 584(c) TO 583(c))
LEAD #690 TO P2
SWITCH #1 SWITCH #2
G-4
510
510A
510A
2CR 5CR 3CR 1CR
510A
510A
589
681
682
585
689
6CR
539
539
539
539
525
525
636
635
635
635
641
641
634
642
629
629
525 (24V)
629
584C
588
587
QU103
C116
583(C)
584(C)
588
PT104
X401 PT501
12 C119
11 C120
D
13
X401
C118
5
587
4 B
6
X401
2
1 A Q107 Q106
3
C402 Q108
X401
9
10 C
8
C117
539
FOR EARLIER LOGIC P.C. FOR LOGIC P.C. BOARDS WITH
BOARDS WITH JUMPERS DIP SWITCHES
CONNECT 1 2 3 4 1 2 3 4
LEAD #694 TO P10
SWITCH #1 SWITCH #2
CONNECT 1 2 3 4 1 2 3 4
LEAD #694 TO P8
SWITCH #1 SWITCH #2
AUTOMATICS (NA-3N AND NA-3S)

OPERATING SCHEMATIC

G
1385 1-5-96J
NA-3 AND NA-4