Welding Process - Lincoln Electric RANGER 225 GXT Service Manual

B-5

WELDING PROCESS

For any electrodes the procedures should be kept with-
in the rating of the machine. For electrode information
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 "OUT-
PUT" 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
90 MAX. 3/32
145 MAX. 1/8
210(DC)/225(AC) 5/32
The RANGER® 225 GXT can be used with a broad
range of AC and DC stick electrodes. See "Welding
Tips 1" included with the RANGER® 225 GXT for elec-
trodes within the rating of this unit and recommended
welding currents of each.
TIG (CONSTANT CURRENT) WELDING
The RANGER® 225 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 210
amps.
The K930 [ ] TIG Module installed on a RANGER® 225 GXT
provides 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® 225 GXT for AC TIG welding of alu-
minum the following settings and electrodes are recommended:
SETTINGS FOR PURE TUNGSTEN
TUNGSTEN RANGE SWITCH
DIAMETER (in.) SETTINGS
1/8 80 or 130
3/32
1/16
OPERATION
CURRENT RANGE
40 TO 90 AMPS
70 TO 145 AMPS
120 TO 210(DC),
225(AC) AMPS
APPROXIMATE
CURRENT RANGE
100 - 300 Amps
80 45 - 140 Amps
80 45 - 100 Amps
RANGER® 225 GXT
SETTINGS FOR 1% THORIATED TUNGSTEN
TUNGSTEN RANGE SWITCH
DIAMETER (in.) SETTINGS
1/8 80, 130, or 180
3/32 80 or 130
1/16 80
For AC TIG Welding, the maximum TIG Welding output
currents on each range setting will be approximately
50% higher than those marked on the nameplate. This
is due to the special nature of the AC TIG welding arc.
Do not AC TIG weld on the 210DC/225AC Amp setting.
The output may exceed the rating of the RANGER®
225 GXT.
WIRE FEED WELDING PROCESSES
(CONSTANT VOLTAGE)
®
The Innershield electrode recommended for use with
the RANGER® 225 GXT is NR
trode sizes and welding ranges that can be used with
the RANGER® 225 GXT are shown in the following
table:
Diameter Wire Speed
(in.) Range In./Min.
.035 80 - 110
.045 70 - 130
.068 40 - 90
The RANGER® 225 GXT is recommended for limited
"MIG" welding (GMAW - gas metal arc welding). The
recommended 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
ranges that can be used with the RANGER® 225 GXT
are shown in the following table:
Diameter Wire Speed
(in.) Range In./Min.
.030 75 - 300
.035 100 - 250
ARC GOUGING
The RANGER® 225 GXT can be used for limited arc
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:
ELECTRODE SETTING CURRENT RANGE (DC, electrode positive)
1/8
5/32
3/16
B-5
APPROXIMATE
CURRENT RANGE
80 - 225 Amps
50 - 180 Amps
45 - 120 Amps
®
-211-MP. The elec-
Approximate
Current Range
75A to 120A
120A to 170A
125A to 210A
). The welding
2
Approximate
Current Range
50A to 130A
90A to 175A
30 - 60 Amps
90 - 150 Amps
150 - 250 Amps