OPERATION |
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MAKING A WELD
1.Inch the electrode through the gun and cable. For solid wire, cut the electrode within approximately 3/8 in. of the end of the contact tip. If using cored wire, cut the electrode within 3/4 in. of the extension guide.
2.Connect the work cable to the metal to be welded. The work cable must make good electrical contact with the work. The work must also be grounded.
WARNING
When using an open arc process, it is necessary to use correct eye, head, and body protection.
3.Position the electrode over the joint. The end of the electrode may be lightly touching the work.
4.Lower your welding helmet. Close the 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.
5.To stop welding, release the gun trigger and then pull the gun away from the work after the arc goes out.
OPTIONAL K416 ANALOG AND K417 DIGITAL VOLTMETER KITS
Lincoln Specified Procedures give voltmeter readings taken between the work and the gun cable brass connection block inside the
To read volts, set the “Electrode Polarity” switch, Figure B.9, to the same polarity as the electrode lead connection to the power source.
The K417 Digital Voltmeter Kit has a hold feature that will freeze the last arc voltage reading at the moment the trigger is released to stop welding. This feature allows the welding operator to easily check the arc voltage and make adjustments if necessary to match procedures. For accuracy, it is important to release the gun trigger and the lift the gun away from the work.
The hold circuit automatically releases about six seconds after the gun trigger is released. It is also released when the trigger is closed again to begin welding.
FIGURE B.9 – ELECTRODE POLARITY SWITCH.
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WIRE REEL CHANGING
At the end of a coil, remove the last of the old electrode from the conductor cable. Either pull it out at the nozzle, or use the following procedure.
1.Cut off the end of the electrode at the gun end. Do not break it off by hand. Breaking by hand puts a slight bend in the wire, making it difficult to pull it back through the nozzle.
2.Uncouple the gun conductor cable from the conductor block on the wire feeder drive unit and lay the gun cable out straight.
3.Using pliers, grip the wire and pull it out of the cable from the connector end.
4.After the electrode has been removed, connect the gun conductor back to the wire feeder.
5.Load a new reel of electrode per the instructions for the specific reel type given previously in this section.
ELECTRODE
POLARITY
SWITCH
