Welding, Procedure at end of coil, Operation – Lincoln Electric LN-25 SVM114-C User Manual

Page 21: Warning

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OPERATION

B-9

B-9

LN-25™

ARC RAYS can burn.

• Do not touch metal portions

of the LN-25™ lead Clip

when welding power source

is on.

CYLINDER may explode if
damaged.

• Keep cylinder upright and

chained to support.

• Keep cylinder away from

areas where it may be dam-

aged.

• Never lift welder with cylinder

attached

• Never allow welding elec-

trode to touch cylinder.

• Keep cylinder away from

welding or other live electrical

circuits.

h. Turn on the welding power source, as well as the

shielding gas supply (if used).

Unless an optional output control or internal contactor

is used, the electrode is elec trically “hot” when the

power source is on. The gun trigger controls wire

feed only.

a. Cut the electrode within approximately

3

8

" of the

end of the contact tip for solid wire and within

approximately

3

4

" of the extension guide for cored

wire.

b. Position electrode over joint. End of electrode

should be slightly off the work.

WARNING

WARNING

WARNING

OPEN ARC WELDING WITH A
CONSTANT CURRENT (formerly
variable voltage) POWER
SOURCE

Although a constant voltage (CV) power source

is recommended for Innershield

®

and gas metal

arc (GMAW) open arc welding, satisfactory general

p u r p o s e w e l d i n g m ay b e o b t a i n e d u s i n g t h e

L N - 2 5 ™ w i t h a c o n s t a n t c u r r e n t ( C C ) p o w e r

source for non-critical commercial quality mild
steel welding applications.

PROCEDURE AT END OF COIL

When the wire on the reel is used up, the following

procedure is to be followed for removing the old wire

from the gun cable and loading a new reel.

a. Shut off power source if a Remote Output Control

Option or internal contactor is not used.

b. Cut the end of the electrode off at the gun end.

Do not break it off by hand since this puts a slight

b e n d i n t h e w i r e a n d m a ke s i t d i f f i c u l t o r

impossible to pull it back through the nozzle.

c. U n c o u p l e t h e g u n c o n d u c t o r c a b l e f r o m

the LN-25™.

d. Lay the cable out straight.

e. Using pliers to grip the wire, pull it out of the

cable from the connector end. Do not pull it from

the gun end.

f. Put the conductor cable back on wire drive unit

after the electrode has been removed.

g. Load a new coil of wire and feed it through the

cable as described in Loading Electrode Section.

c. Lower welding helmet, close gun trigger, and

begin welding. Hold the gun so the contact tip to

work distance gives the correct electrical stickout

as required for the procedure being used.

NOTE: If the arc voltage is not within the proper
procedure range adjust the power source output

control. (The CC mode WIRE SPEED setting should

not be changed from the preset procedure value for

the proper arc voltage.)

d. To s t o p we l d i n g , r e l e a s e t h e g u n t r i g g e r a n d

then pull the gun away from the work. Store the

gun in the LN-25™ insulated gun holder when

not welding.

WELDING

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