Making A Weld With The Magnum Sg Spool Gun - Lincoln Electric 11519 Service Manual

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MAKING A WELD WITH THE
MAGNUM SG SPOOL GUN
The Power MIG® 255XT control circuitry is designed to
sense either the spool gun or (built in) wire feeder
trigger circuitry. The spool gun can easily be plugged in
and will be ready to use.
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CAUTION
Closing either gun trigger will cause the electrode
of both guns to be electrically "HOT". Be sure
unused gun is positioned so electrode or tip will
not contact metal case or other metal common to
work.
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1. Pulling the trigger for the built-in feeder gun:
a. Disables spool gun operation.
b. Closing feeder gun trigger starts feeder gun
welding and makes both electrodes electrically
"HOT".
2. Pulling SPOOL GUN Trigger:
a. Disables built-in feeder gun operation.
b. Closing spool gun trigger starts spool gun weld-
ing and makes both electrodes electrically
"HOT".
3. Operation with Power MIG® 255XT:
a. Turn the Power MIG® 255XT input power ON.
b. Adjusting the voltage control will increase or
decrease your welding voltage.
c. Adjusting the wire speed control on the spool gun
will increase or decrease the spool gun wire feed
speed.
d. For the Magnum SG Spool Gun, the wire feed
speed is controlled by combination of the wire
feed speed displayed on the Power MIG® 255XT
and the wire speed control on the spool gun.
ACCESSORIES
See the following procedure for setting the Wire Speed
Feed using the Magnum SG Spool Gun:
Wire Feed Speed
Display
50
300
700
To determine spool gun wire feed speed use a hand
tachometer, or calculate the speed using the following
equation:
IPM= Length of wire fed (inches) x 60
4. To return to normal Power MIG® 255XT welding,
release the spool gun trigger and reset feeder gun
welding procedures.
Power MIG® 255XT
SG Spool Gun Wire Feed Speed
Approximate Range
50-200
200-400
300-600
Time fed (seconds)
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