Welding, Procedure AT END of Coil | Lincoln Electric SVM114-C

B-9

OPERATION

B-9

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h. Turn on the welding power source, as well as the shielding gas supply (if used).

WARNING

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.

WARNING

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.

WELDING

WARNING

ARC RAYS can burn.

• Do not touch metal portions of the LN-25™ lead Clip when welding power source is on.

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.

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 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.

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 bl 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.

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 purpose welding may be obtained using the LN-25™ with a constant current (CC) power source for non-critical commercial quality mild steel welding applications.