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Tungsten Electrode DCEN (-) DCEP (+) Approximate Argon Gas Flow TIG TORCH
Diameter in. (mm) Flow Rate C.F.H. ( l /min.) Nozzle Size (4), (5)
1%, 2% Thoriated 1%, 2% Thoriated Aluminum Stainless Steel
Tungsten Tungsten
.010 (.25) 2-15 (3) 3-8 (2-4) 3-8 (2-4) #4, #5, #6
0.020 (.50) 5-20 (3) 5-10 (3-5) 5-10 (3-5)
0.040 (1.0) 15-80 (3) 5-10 (3-5) 5-10 (3-5)
1/16 (1.6) 70-150 10-20 5-10 (3-5) 9-13 (4-6) #5, #6
3/32 (2.4) 150-250 15-30 13-17 (6-8) 11-15 (5-7) #6, #7, #8
1/8 (3.2) 250-400 25-40 15-23 (7-11) 11-15 (5-7)
5/32 (4.0) 400-500 40-55 21-25 (10-12) 13-17 (6-8) #8, #10
3/16 (4.8) 500-750 55-80 23-27 (11-13) 18-22 (8-10)
1/4 (6.4) 750-1000 80-125 28-32 (13-15) 23-27 (11-13)
(1) When used with argon gas. The current ranges shown must be reduced when using argon/helium or pure helium shielding gases.
(2) Tungsten electrodes are classified as follows by the American Welding Society (AWS):
Pure EWP
1% Thoriated EWTh-1
2% Thoriated EWTh-2
Though not yet recognized by the AWS, Ceriated Tungsten is now widely accepted as a substitute for 2% Thoriated Tungsten in AC and DC applications.
(3) DCEP is not commonly used in these sizes.
(4) TIG torch nozzle "sizes" are in multiples of 1/16ths of an inch:
# 4 = 1/4 in. (6 mm)
# 5 = 5/16 in. (8 mm)
# 6 = 3/8 in. (10 mm)
# 7 = 7/16 in. (11 mm)
# 8 = _ in. (12.5 mm)
#10 = 5/8 in. (16 mm)
(5) TIG torch nozzles are typically made from alumina ceramic. Special applications may require lava nozzles, which are less prone to breakage, but cannot withstand high temperatures
and high duty cycles.
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The Ranger® 305D can be used with a broad range of DC
stick electrodes. The MODE switch provides two stick
welding settings as follows:
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The CC-STICK position of the MODE switch is designed
for horizontal and vertical-up welding with all types of elec-
trodes, especially low hydrogen. The output CONTROL
dial adjusts the full output range for stick welding.
The ARC CONTROL dial sets the short circuit current
(arc-force) during stick welding to adjust for a soft or crisp
arc. Increasing the number from -10(soft) to +10(crisp)
increases the short circuit current and prevents sticking of
the electrode to the plate while welding. This can also
increase spatter. It is recommended that the ARC CON-
TROL be set to the minimum number without electrode
sticking. Start with the dial set at 0.
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This slope controlled setting is intended for "out-of-posi-
tion" and "down hill" pipe welding where the operator
would like to control the current level by changing the arc
length. The output CONTROL dial adjusts the full output
range for pipe welding. The ARC CONTROL dial sets the
short circuit current (arc-force) during stick welding to
adjust for a soft or more forceful digging arc (crisp).
Increasing the number from -10(soft) to +10(crisp)
increases the short circuit current which results in a more
forceful digging arc.Typically a forceful digging arc is pre-
ferred for root and hot passes. A softer arc is preferred for
fill and cap passes where weld puddle control and deposi-
tion (“stacking” of iron) are key to fast travel speeds. This
can also increase spatter.
It is recommended that the ARC CONTROL be set to the
minimum number without electrode sticking. Start with
the dial set at 0.
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The TOUCH START TIG setting of the MODE switch is
for DC TIG (Tungsten Inert Gas) welding. To initiate a
weld, the CONTROL dial is first set to the desired current
and the tungsten is touched to the work. During the time
the tungsten is touching the work there is very little volt-
age or current and, in general, no tungsten contamina-
tion. Then, the tungsten is gently lifted off the work in a
rocking motion, which establishes the arc.
When in the TOUCH START TIG mode and when a
Amptrol is connected to the 6-Pin connector the OUT-
PUT dial is used to set the maximum current range of the
current control of the Amptrol.
The ARC CONTROL is not active in the TIG mode. To
STOP a weld, simply pull the TIG torch away from the
work. When the arc voltage reaches approximately 30
Volts the arc will go out and the machine will reset the
current to the Touch Start level. To reinitiate the arc,
retouch the tungsten to the work and lift. Alternatively,
the weld can be stopped by releasing the Amptrol or arc
start switch.
The RANGER® 305 D can be used in a wide variety of
DC TIG welding applications. In general the ‘Touch Start’
feature allows contamination free starting without the use
of a Hi-frequency unit. If desired, the K930-2 TIG Module
can be used with the RANGER® 305 D. The settings are
for reference.
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