Lincoln Electric IM677 RED-D-ARC LN-25 - Manual (Page 19)

LN-25
B-8 B-8
ARC RAYS can burn.
• Do not touch metal por-
tions of the LN-25 lead
Clip when welding power
source is on.
OPERATION
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 cylin-
der attached
• Never allow welding elec-
trode to touch cylinder.
• Keep cylinder away from
welding or other live electri-
cal circuits.
g. Be sure the proper contact tip for the wire size
being used is in the gun, and the gun is safe
from work contact. (Use the LN-25 insulated
gun holder.)
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 electrically “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 POWER
SOURCE
The LN-25 should be used with a constant current
machine only upon non-critical weldments and after
testing is done to assure quality is adequate for the
application.
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
bend in the wire and makes it difficult or
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 stick
out 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 stop welding, release the gun trigger and
then pull the gun away from the work. Store the
gun in the LN-25 insulated gun holder when
not welding.
WELDING
WARNING