LN-25 PRO Wire Feeder

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G-7			ElECTriCal DiaGrams	G-7
sChEmaTiC - lN-25 prO - COmplETE maChiNE CODEs 11387, 11388 - (G5683) pG2

	G5683	ENGINEERING CONTROLLED	CHANGE DETAIL: REVISED LEADS GOING TO P17.
		MANUFACTURER: No

TIMER P. C. BOARD CIRCUIT

Timer Board Summary

Has potentiometers for Burnback, Preflow and Postflow.

Preflow range from 0ms to 10s.

Burnback range from 0 to 250 ms.

Postflow range from 50ms to 10 s.

Receives “Gas Flow Enable” signal.

Outputs 16 ms pulses to turn Gas Flow On / Off.

(LOCATED BEHIND WIRE

(LOCATED ON CASE FRONT)

REEL COVER)

ADJUST KNOB

+5V

CW= +5

+5V

10K

CCW= 0V

10K

BURNBACK

POSTFLOW

PREFLOW

POT.

COM

POT.

COM

15V SIGNAL

15V

15 ms PULSES

OUTPUT

TOGGLE GAS FLOW

TIMER KIT

MICROCONTROLLER

ON/OFF

(OPTIONAL)

GAS FLOW

COM

5V SIGNAL

SCHEMATIC =

ENABLE

M21342

J60-8

J60-7

J60-6

J60-5

J60-4

J60-3

J60-2

J60-1

607

NOT

608

606A

605

509B

601

USED

TO CONTROL BD. (VIA P60 plug)

			PRESET P. C. BOARD CIRCUIT
					SCHEMATIC = G4748
				(LOCATED ON CASE FRONT)
						MOTOR
						THERMAL
						3 LEDs
					WFS/AMPS DISPLAY		VOLTS DISPLAY
	{			7 SEGMENT
				DISPLAYS
		701	J10-10	(2 each)
0V = RUN IN ENABLED		701	J10-10		WFS	AMPS	VOLTS
					WFS	AMPS	VOLTS
					set=WFS
TO SWITCH S5 RUN IN		702	J10-11		actual = AMPS		SIGNALS TO
		702	J10-11				DISPLAY & LED
	{						SERIAL SPI	TO J1
							COMMUNICATION	TO J1
		77B	J10-16	+			SPI (10 leads)	CONTROL
TO REMOTE VOLTS		77B	J10-16		VOLTAGE	MICROCONTROLLER		PC BOARD
TO REMOTE VOLTS					VOLTAGE			PC BOARD
				-
POTENTIOMETER R2		76B	J10-14	-	MEASUREMENT
AND POWER SOURCE				-	OF REMOTE
AND POWER SOURCE		75B	J10-15		VOLTS
		75B	J10-15		POTENTIOMETER
				+			SETUP
				+			PUSHBUTTON

							SETUP
ARC VOLTAGE							LED
ARC VOLTAGE		ELECTRODE		67	J10-6
MEASUREMENT		ELECTRODE		67	J10-6	ARC VOLTAGE			SETUP
MEASUREMENT		{WORK				ARC VOLTAGE			SETUP
FOR DISPLAY			{	21	J10-8 +15V	FEEDBACK			PUSHBUTTON
FOR DISPLAY				21	J10-8 +15V				PUSHBUTTON
				805	J10-9	-15V			(BOARDMOUNTED)
				805	J10-9	-15V
ARC CURRENT MEASUREMENT				804	J10-4
FOR DISPLAY & ARC ESTABLISHED				801	J10-1	ARC CURRENT	J10-12	708	ARC ESTABLISHED OUTPUT
						FEEDBACK	J10-12	708	ARC ESTABLISHED OUTPUT
	{			802	J10-2	FEEDBACK			IF V> 10V RELATIVE TO COMMON
				802	J10-2	+4V = +500A			0V= ARC NOT ESTABLISHED
					COM	-4V = -500A			TO CONTROL BOARD (VIA P7)
INPUT		CONTROL CABLE		41	J12-1
POWER		INPUT POWER		42	J12-4	-15V	J6-8	707	FROM CONTROL BOARD (VIA P7)
		DETECTION		42	J12-4	-15V	J6-8	707	FROM CONTROL BOARD (VIA P7)
		DETECTION
		(<18 VAC TO DETECT)

PROPRIETARY & CONFIDENTIAL: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.

MANUFACTURING TOLERANCE PER E2056

CONTROL: CLEVELAND

SCALE:

EQUIPMENT TYPE:

LN-25 PRO

UNLESS OTHERWISE SPECIFIED TOLERANCE:

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

NONE

PAGE ___ OF ___

DRAWN BY:

ddietz

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

IF PRINTED

SUBJECT:

MACHINE SCHEMATIC

DOCUMENT

MATERIAL TOLERANCE ("t") TO AGREE

ENGINEER:

ENYEDY

@ A2 SIZE

NUMBER:

REVISION:

ON ALL ANGLES IS ± .5 OF A DEGREE

G5683

WITH PUBLISHED STANDARDS.

UNITS:

MATERIAL

APPROVAL

11/16/2007

PROJECT

CRM39437

REFERENCE:

DO NOT SCALE THIS DRAWING

APPROVED:

INCH

DISPOSITION:

DATE:

NUMBER:

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.

Lincoln Electric SVM179-B service manual LN-25 PRO Wire Feeder

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ElECTriCal DiaGrams

G5683