Dc Wire Feed Welding (Cv) With Ranger 300 D; Carbon Arc Gouging (Constant Current - Lincoln Electric RANGER SVM148-B Service Manual

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DC WIRE FEED WELDING (CV) WITH
RANGER 300 D
1. Connect an LN-25 with internal contactor to the
Ranger 300 D.
2. The only Innershield electrode recommended for
use with the Ranger 300 D is NR211MP. The elec-
trode sizes and welding ranges that can be used
with the Ranger 300 D are shown in the following
table:
Electrode Wire Speed
Diameter in. / min.
.035" 70 - 110
.045" 70 - 130
.068" 40 - 90
The Ranger 300 D is recommended for limited "MIG"
welding (GMAW - gas metal arc welding). The recom-
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
electrode gives improved starting compared to .030
diameter. The welding ranges that can be used with
the Ranger 300 D are shown in the following table:
Electrode Wire Speed
Diameter in. / min.
.030" 150 - 450
.035" 100 - 350
3. Set the IDLER control to AUTO.
4. Set the RANGE switch to WIRE FEED (CV-red set-
ting).
5. Set the POLARITY SWITCH to either WIRE WELD-
ING DC+ (red) or WIRE WELDING DC- (red),
depending on the electrode.
6. Set the OUTPUT control to a setting between 1 and
10 that gives the most stable arc for the applica-
tion.
7. Strike an arc and begin welding. The OUTPUT
control can be adjusted while welding. DO NOT
change the RANGE switch setting while welding.
This can result in damage to the switch.
OPERATION
AFTER YOU FINISH WELDING:
1. Stop the engine.
2. Allow the work to cool completely.
3. Remove the work clamp from the work.
CARBON ARC GOUGING
(CONSTANT CURRENT)
1. The recommended electrode is a 3/16" (4.8 mm)
Approximate
2 Set the RANGE switch to 300.
Current Range
3 Set the POLARITY switch to DC+ (cc - blue setting).
60 - 120 amps
4 Set the OUTPUT control to 10.
120 - 170 amps
5. Strike an arc and begin gouging.
125 - 210 amps
AFTER YOU FINISH GOUGING:
1. Stop the engine.
2. Allow the electrode and work to cool completely.
3. Remove the work clamp from the work.
). The .035 diameter
2
Approximate
Current Range
80 - 170 amps
80 - 190 amps
RANGER 300 D AND 300 DLX
dia. carbon.
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