B-7 B-7
RANGER 305D
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TungstenElectrode DCEN(-) DCEP(+) ApproximateArgon Gas Flow TIGTORCH
Diameterin. (mm) FlowRate C.F.H. ( l /min.) Nozzle Size 4, 5
1%,2% Thoriated 1%,2% Thoriated Aluminum Stainless Steel
Tungsten Tungsten
0.010 (.25) 2-15 33-8 (2-4) 3-8 (2-4) #4,#5,#6
0.020 (.50) 5-20 35-10 (3-5) 5-10 (3-5)
0.040 (1.0) 15-80 35-10 (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 180-125 28-32 (13-15) 23-27 (11-13)
1Whenused with argon gas. Thecurrent ranges shown must be reduced when using argon/helium or pure helium shielding gases.
2Tungstenelectrodes are classified as follows by the American Welding Society (AWS):
Pure EWP
1%Thoriated EWTh-1
2%Thoriated EWTh-2
Thoughnot yet recognized by the AWS, Ceriated Tungsten is now widely accepted as a substitute for 2% Thoriated Tungstenin AC and DC applications.
3DCEPis not commonly used in these sizes.
4TIGtorch nozzle "sizes" are in multiples of 1/16ths of an inch:
#4 = 1/4 in. (6 mm)
#5 = 5/16 in. (8mm)
#6 = 3/8 in. (10 mm)
#7 = 7/16 in. (11mm)
#8 = 1/2 in. (12.5 mm)
#10= 5/8 in. (16 mm)
5TIGtorch nozzles are typically made from alumina ceramic. Specialapplications may require lava nozzles, which are less prone to breakage, but cannot withstand high temperatures and
highduty cycles.
BREAK-IN PERIOD
Anyengine will use a small amount of oil during its “break-
in” period. For the diesel engine on the Ranger 305D,
break-in is about 50 running hours.
Check the oil every four hours during break-in, and
change both oil and oil filter at 50 hours of operation.
Change the oil every 75 hours thereafter and the oil filter
every 150 hours. For more details, see the Maintenance
section of this manual.
During break-in, subject the Ranger 305D to moderate
loads. Avoid long periods running at idle. Before stopping
the engine, remove all loads and allow the engine to cool
several minutes.
STICK WELDING
The Ranger 305D can be used with a broad range of DC
stick electrodes.
The MODE switch provides two stick welding settings as
follows:
Constant Current (CC-STICK) Welding
The CC-STICK position of the MODE switch is designed
for horizontal and vertical-up welding with all types of
electrodes, especially low hydrogen. The OUTPUT con-
trol 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.
DOWNHILLPIPE Welding
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. TheARC 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.Typicallya 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 depo-
sition (“stacking” of iron) are key to fast travel speeds.
TABLE B.2-TYPICAL CURRENT RANGES1FOR TUNGSTEN ELECTRODES2
OPERATION