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B-4
WELDING PROCESS
For any electrodes the procedures should be kept
within the rating of the machine. For electrode infor-
mation see the appropriate Lincoln publication.
STICK (CONSTANT CURRENT) WELDING
Connect welding cables to the "TO WORK" and
"ELECTRODE" studs. Start the engine. Set the
"Polarity" switch to the desired polarity. The "RANGE"
switch markings indicate the maximum current for that
range as well as the typical electrode size for that
range. The "OUTPUT" Control provides fine adjust-
ment of the welding current within the select range.
For maximum output within a selected range set the
"OUTPUT" Control at 10. For minimum output within a
selected range set the "OUTPUT" Control at 5. ("OUT-
PUT" Control settings below 5 may reduce arc stabili-
ty) For best overall welding performance set the
"RANGE" Switch to the lowest setting and the OUT-
PUT" Control near the maximum to achieve the
desired welding current.
RANGE SETTING
TYPICAL
ELECTRODE SIZE
80 MAX.
3/32
130 MAX.
1/8
180 MAX.
5/32
250 MAX.
3/16
The Ranger
250 GXT can be used with a broad
®
range of AC and DC stick electrodes. See "Welding
Tips 1" included with the Ranger
trodes within the rating of this unit and recommended
welding currents of each.
TIG (CONSTANT CURRENT) WELDING
The Ranger
250 GXT can be used in a wide variety of AC and
®
DC Tungsten Inert Gas (TIG) welding applications for AC TIG
Welding up to 200 amps and DC TIG welding up to 250 amps.
The K930 [ ] TIG Module installed on a Ranger
vides high frequency and shielding gas control for AC and DC
GTAW (TIG) welding processes. The TIG Module allows full
range output control.
When using the Ranger
250 GXT for AC TIG welding of alu-
®
minum the following settings and electrodes are recommended:
For AC TIG Welding, the maximum TIG Welding out-
SETTINGS FOR PURE TUNGSTEN
TUNGSTEN
RANGE SWITCH
DIAMETER (in.)
SETTINGS
1/8
80 or 130
3/32
80
1/16
80
OPERATION
TUNGSTEN
DIAMETER (in.)
put currents on each range setting will be approxi-
mately 50% higher than those marked on the name-
plate. This is due to the special nature of the AC TIG
welding arc. Do not AC TIG weld on the 250 Amp set-
ting. The output may exceed the rating of the Ranger
250 GXT.
WIRE FEED WELDING PROCESSES
(CONSTANT VOLTAGE)
The Innershield
the Ranger
sizes and welding ranges that can be used with the
Ranger
The Ranger
CURRENT RANGE
50 TO 80 AMPS
70 TO 130 AMPS
"MIG" welding (GMAW - gas metal arc welding). The
110 TO 180 AMPS
recommended electrodes are .030" and .035" L-50
160 TO 250 AMPS
and L-56. They must be used with a blended shield-
ing gas such as C25 (75% Argon - 25% CO
welding ranges that can be used with the Ranger
GXT are shown in the following table:
250 GXT for elec-
®
ARC GOUGING
250 GXT pro-
The Ranger
®
gouging.
Set the Range switch to adjust output current to the
desired level for the gouging electrode being used
according to the ratings in the following table:
APPROXIMATE
CURRENT RANGE
100 - 300 Amps
45 - 140 Amps
45 - 100 Amps
RANGER
250 GXT
®
SETTINGS FOR 1% THORIATED TUNGSTEN
RANGE SWITCH
SETTINGS
1/8
80, 130, or 180
3/32
80 or 130
1/16
80
electrode recommended for use with
®
250 GXT is NR
®
250 GXT are shown in the following table:
®
250 GXT is recommended for limited
®
Diameter
Wire Speed
(in.)
Range In./Min.
.035
80 - 110
.045
70 - 130
.068
40 - 90
5/64
50 - 75
Diameter
Wire Speed
(in.)
Range In./Min.
.030
75 - 300
.035
100 - 250
.045
125 - 200
250 GXT can be used for limited arc
®
ELECTRODE SETTING
CURRENT RANGE (DC, electrode positive)
1/8
5/32
3/16
B-4
APPROXIMATE
CURRENT RANGE
80 - 225 Amps
50 - 180 Amps
45 - 120 Amps
®
-211-MP. The electrode
®
Approximate
Current Range
75A to 120A
120A to 170A
125A to 210A
180A to 235A
). The
2
250
®
Approximate
Current Range
50A to 130A
80A to 175A
145A to 200A
30 - 60 Amps
90 - 150 Amps
150 - 250 Amps
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