Lincoln Electric 225 GXT - Manual (Page 20)

B-4 OPERATION 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 CURRENT RANGE
ELECTRODE SIZE
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
electrodes within the rating of this unit and recom-
mended 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:
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
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 ® -211-MP. The elec-
trode sizes and welding ranges that can be used with
the RANGER® 225 GXT are shown in the following
table:
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 shield-
ing gas such as C25 (75% Argon - 25% CO
2
). The
welding ranges that can be used with the RANGER®
225 GXT are shown in the following table:
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:
RANGER® 225 GXT
Diameter Wire Speed Approximate
(in.) Range In./Min. Current Range
.035 80 - 110 75A to 120A
.045 70 - 130 120A to 170A
.068 40 - 90 125A to 210A
Diameter Wire Speed Approximate
(in.) Range In./Min. Current Range
.030 75 - 300 50A to 130A
.035 100 - 250 90A to 175A
SETTINGS FOR PURE TUNGSTEN
TUNGSTEN RANGE SWITCH APPROXIMATE
DIAMETER (in.) SETTINGS CURRENT RANGE
1/8 80 or 130 100 - 300 Amps
3/32 80 45 - 140 Amps
1/16 80
45 - 100 Amps
SETTINGS FOR 1% THORIATED TUNGSTEN
TUNGSTEN RANGE SWITCH APPROXIMATE
DIAMETER (in.) SETTINGS CURRENT RANGE
1/8 80, 130, or 180 80 - 225 Amps
3/32 80 or 130 50 - 180 Amps
1/16 80 45 - 120 Amps
ELECTRODE SETTING CURRENT RANGE (DC, electrode positive)
1/8 30 - 60 Amps
5/32 90 - 150 Amps
3/16 150 - 250 Amps
90 MAX.
145 MAX.
210(DC)/225(AC)
3/32
1/8
5/32
40 TO 90 AMPS
70 TO 145 AMPS
120 TO 210(DC),
225(AC) AMPS