Ln-25 pro wire feeder, Electrical diagrams, G-10 – Lincoln Electric LN-25 SVM179-B User Manual

Page 88: Ln-25™ pro

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G-10

lN-25™ prO

sChEmaTiC - lN-25 prO - COmplETE maChiNE CODEs 11620, 11621, 11716, 11717 - (G5683-2) pG1

G5683-2

LN-25 PRO ANALOG

MACHINE SCHEMATIC

NONE

G5683-1

DO NOT SCALE THIS DRAWING

EQUIPMENT TYPE:

SUBJECT:

SCALE:

CRM40943

PAGE ___ OF ___

ENGINEERING CONTROLLED
MANUFACTURER:

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OWNED BY LINCOLN GLOBAL, INC. AND MAY NOT BE DUPLICATED, COMMUNICATED
TO OTHER PARTIES OR USED FOR ANY PURPOSE WITHOUT THE EXPRESS WRITTEN PERMISSION OF LINCOLN GLOBAL, INC.

PROPRIETARY & CONFIDENTIAL:

MATERIAL TOLERANCE (" ") TO AGREE

WITH PUBLISHED STANDARDS.

ON ALL ANGLES IS ± .5 OF A DEGREE

ON 3 PLACE DECIMALS IS ± .002 in. (± 0.05 mm)

ON 2 PLACE DECIMALS IS ± .02 in. (± 0.5 mm)

UNLESS OTHERWISE SPECIFIED TOLERANCE:

MANUFACTURING TOLERANCE PER E2056

RELEASED A.03 FROM "X".

CHANGE DETAIL:

REFERENCE:

MATERIAL
DISPOSITION:

APPROVAL
DATE:

PROJECT
NUMBER:

DOCUMENT
NUMBER:

DOCUMENT
REVISION:

IF PRINTED

@ A1 SIZE

UNITS:

INCH

11/6/2009

tpearn

ENYEDY

DRAWN BY:

ENGINEER:

CLEVELAND

APPROVED:

CONTROL:

G56

-2

LN-25 PRO WIRE FEEDER

Start-Up

On power-up, the LN-25 PRO will light the motor thermal LED and
polarity LED 2-3 seconds.

If the feeder is powered-up with the trigger depressed, welding will
not start until the trigger is released and then depressed again.

Notes:

Motor overcurrent limit varies with WFS.

FEED

PLATE

67C & 67D

J4-10

MOTOR /

GEARBOX

551

550

531

537

534

72 HZ TO 1.2 KHZ
R-B 15.0 VDC
B-U 6.2 VDC ANY SPEED
(METER DEPENDENT)

Motor is located
behind
glastic panel

Gearbox ratio is 23.5:1
Motor case is at
electrode potential

From Power Source
(Electrode Connection)

J4-7

0-5V PULSE SIGNAL
FREQUENCY = SPEED

WIRE FEED
SPEED

0V = MIN SPEED
5V = MAX SPEED

GAS PURGE

FLEXIBLE POWER P.C. BOARD

SCHEMATIC = G4783

Top of motor

Motor resistance
is 1.5 ohms

Leads Pass through
toroid 2 times.

Located on
Case front

Leads Pass
through
toroid 2 times.

ISOLATED 2-4 TO
POWER SOURCE

BLACK

RED

FAN

GAS PURGE

PUSHBUTTON

SWITCH (N.O.)

612

610

13.5 VDC WHEN
NOT DEPRESSED

J6-1

J6-7

J2-1

(LOCATED INSIDEOF
CONTROL BOX)

FAN BLOWS AIR ACROSS
CONTROL PC BOARD
CONTINOUSLY AT 6200 RPMS.

GAS

SOLENOID

690

691

J4-4

J4-3

J2-5

100K

ohm

+15V

J3-7

+5V

-1

-2

-3

-4

-5

PROGRAMMING PCB
FACTORY USE ONLY

GAS SOLENOID

WORK

CLIP

+35V

POWER
SUPPLY

+5V SPI

+15V SPI

OVER

VOLTAGE

PROTECTION

ISO

LED

35VDC

+5VDC

+15V ISO

-15V

COM

MOTOR
SUPPLY

COM

J5-1

J5-8

621A

Located on Case Front

J4-11 J4-12 J4-6

100K
ohm

+5V

J3-6

J3-8

+5V SPI

J4-9

10K
ohm

+15V

COM

534

537

531

J4-1

J4-2

550

551

TACH
FEEDBACK

Model

Ranger 8,9

Classic

Ranger 250, 305

Commander 300,400,500

(Common Analog

Controls)

V350

(Common Digital

Controls)

DC-400, 600

Square Wave TIG 300/355

Miller Inverters

STT II

K2613-1
K2613-2

Recommended
all CV
operation.

Recommended for
CV operation.
(Wire Feed
Module Required)

Recommended for CV
operation.

Recommended
for CV
operation.
May be used for
pulse welding if
the welding
procedure is
qualified by the
customer.

Recommended
for CV and CC
operation.

Not recommended for CC operation
because the customer may
experience short contactor life from
inductive nature of the power source.
Not recommended with high frequency
TIG starti ng.

Recommended
for CV voltage
sense operation.
Not
recommended for
use when pulse
welding.

Not recommended
for STT operation.

Note:

Most semiautomatic wire

welding processes perform
better using constant voltage
power sources. Be sure the
proper power source is used
for your application. Contactor
life may be shortened in
applications using CC
machines with high OCV.

J5-6

J5-7

21D

67F

721

J5-5

ANALOG

VOLTMETER

667B

721

TRIGGER

-15

+15

721 IS DRIVEN NEGATIVE TO COMPENSATE
FOR THE METER FOR DIODE DROP ERROR
ON THE BRIDGE

METER
COMPENSATION
CIRCUIT

POLARITY
SENSE

PROGRAM

BURNBACK

MOTOR
DRIVE
CIRCUIT

MOTOR VOLTAGE

MOTOR CURRENT

BRAKE

DRIVE

BRAKE

DRIVE

PWM

0.05K
ohm

J6-3

J6-2

587

530

J6-4

523

J6-6

509A

+15V

COLD FEED

CC/VV

TRIGGER INTERLOCK / 2 STEP

S1, S2 & S3 Located
on Wire Drive Panel

509D

509E

TRIGGER INTERLOCK

(NOT PRESENT ON K2613-3)

587

2-STEP

Located on Wire
Drive Panel

Trigger Interlock does not stop
welding when the arc is broken.
Pull and release to end the weld.

509B

523

COLD FEED

530A

509E

(LOCATED AT REAR
OF FEEDER)

667C

0V=COLD FEED

(N.O.)

15V=CV
0V=CC

15V=2 STEP
0V=TRIGGER

INTERLOCK

606A

+15V

J5-4 J5-3

MOV

MACHINE
OUTPUT
ENABLE

CONTACTOR DRIVE

COM

+35V

J4-8 J4-5

CONTACTOR

4 O COIL
0 VDC OPEN
3 VDC CLOSED
12 VDC COIL
PWM CONTROLLED

507

578

ohm

0V = OFF
20msec ---- 250msec

605

601

J2-6 J2-3

608

607

J2-7

COM

YELLOW THERMAL LED

COM

POLARITY LED

J6-11

J6-14

+5V SPI

GREEN

POLARITY

LED

YELLOW

MOTOR

THERMAL

LED

ARC ESTABLISHED

J1-2 J1-1

+5V SPI +15V

J1-10

-8

-6

-5

-4

-9

-3

-7

SPI DIGITAlL COMMUNICATION

J6-8

-15V

GAS
ON - OFF

GAS

FLOW

ENABLE

Located under
Wire Drive Panel

(LOCATED AT OUTSIDE
REAR OF FEEDER)

10K/2W

0 VDC MIN. WFS
5 VDC MAX. WFS

WIRE FEED SPEED

CONTROL

POTENTIOMETER

621

667

Connector located
behind case front

COM

(LOCATED AT TOP
FRONT OF FEEDER)

MICRO
CONTROLLER

COM

MOTOR
SUPPLY

6
2

J18

P16

Located on
top of motor

PLASTIC HOUSED BOLTED
CONNECTION (BASE CENTER)

TIMER KIT P.C. BOARD

(OPTIONAL)

SCHEMATIC = M21341

SEE PAGE 2

L12081 2.6 V @ 50 IPM

27 V @ 700 IPM

L13084 2.6 V @ 25 IPM

32 V @ 400 IPM

0V.=TRIGGER

CLOSED

15VDC.=TRIGGER

OPEN

Located on
Case Front

TRIGGER

INPUT

TRIGGER CONNECTOR

J14

622A

500A

B
C
D

P7-1

67D

67C

667B

67B

67C

67B

IN HARNESS
CENTER BASE
AREA

P7 = 16 PIN

P17 = 6 PIN (Both are located on lower front)

577A

576A

575A

577A

575A

576A

577A

576A

575A

77C

76C

75C

531
537

534

40V MAX.

21B

.05 uF
600 V

707

608

607

J2-8

gun connector

4 of 4

3 of 4

J6-9 J6-10

622

500

+15V

2 of 2

P17

1 of 4

When tach feed back is lost,
the voltage to the motor is a
constant 10VDC.
(controlled by software)

P17

case front

strain rel

ief

1 of 2

2 of 4

copper bar

weld cable

case back

strain rel

ief

509C

21A

21C

21E

JUMPER TOGETHER FOR
EXTRA TORQUE MACHINE

P60

601

509B

605

J2-2

+5V

606

EXTRA TORQUE

TAKEN WITH 40 V INPUT
IN CV MODE.

667A

WFS limited by arc voltage when operating across the arc

Feeder Input Volts Standard Gear Extra Torque

280

210

340

235

440

400

520

400

600

400

Maximum WFS

EXTRA

TORQUE

Control Board Summary

Converts arc power to a usable control circuit voltage.
Receives switch signals from Trigger, Cold Feed, Gas Purge
Reads WFS potentiometer.
Communicates with optional timer kit.
Controls motor speed with PWM.
Turns Gas Solenoid on, off, PWM.
Reads the motor tachometer.
Operating Voltage= 15-110 VDC.
Shut down Voltage= 130 VDC.
Thermal light turns on when shutdown voltage exceeded.

Code and Serial numbers are below Wire Drive on plastic
housing Nameplate.
Thermal “Yellow” Light

Motor Over Current

Motor and trigger disabled for 30 seconds.
Must retrigger to start welding after 30 seconds pass.

Shutdown Voltage exceeded

May occur with some inverters.
May occur with some CC machines with high
inductance.

Polarity “Green” Light

On= Positive Polarity
Off= Negative Polarity

708

J6-5

J6-12

509B

The WFS range of the LN-25 PRO
Normal Speed = 40- 700 IPM.
Extra Torque = 25- 400 IPM.