Welding Process; Stick (Constant Current) Welding; Tig (Constant Current) Welding; Wire Feed Welding Processes (Constant Voltage - Lincoln Electric RANGER GXT Operator's Manual

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
3/16
250 MAX.
The RANGER GXT can be used with a broad range of
AC and DC stick electrodes. See "Welding Tips 1"
included with the RANGER GXT for electrodes within
the rating of this unit and recommended welding cur-
rents of each.

TIG (CONSTANT CURRENT) WELDING

The Ranger 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 GXT provides
high frequency and shielding gas control for AC and DC GTAW
(TIG) welding processes. The TIG Module allows full range out-
put control.
When using the Ranger GXT for AC TIG welding of aluminum
the following settings and electrodes are recommended:
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.)
For AC TIG Welding, the maximum TIG Welding out-
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
GXT.
WIRE FEED WELDING PROCESSES
(CONSTANT VOLTAGE)
The Innershield
the RANGER GXT is NR
sizes and welding ranges that can be used with the
RANGER GXT are shown in the following table:
CURRENT RANGE
50 TO 80 AMPS
70 TO 130 AMPS
The RANGER GXT is recommended for limited "MIG"
110 TO 180 AMPS
welding (GMAW - gas metal arc welding). The recom-
160 TO 250 AMPS
mended electrodes are .030" and .035" L-50 and L-56.
They must be used with a blended shielding gas such
as C25 (75% Argon - 25% CO
that can be used with the RANGER GXT are shown in
the following table:

ARC GOUGING

The RANGER GXT can be used for limited arc goug-
ing.
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 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
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
ELECTRODE SETTING CURRENT RANGE (DC, electrode positive)
1/8
5/32
3/16
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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 welding ranges
2
Approximate
Current Range
50A to 130A
80A to 175A
145A to 200A
30 - 60 Amps
90 - 150 Amps
150 - 250 Amps