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OPERATION | ||
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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:
Constant Current (CC-STICK) Welding
It is recommended that the ARC CONTROL be set to the minimum number without electrode sticking. Start with the dial set at 0.
TIG WELDING
The | The TOUCH START TIG setting of the MODE switch is | |||||||||||
for horizontal and | for DC TIG (Tungsten Inert Gas) welding. To initiate a | |||||||||||
trodes, especially low hydrogen. The output CONTROL | weld, the CONTROL dial is first set to the desired current | |||||||||||
dial adjusts the full output range for stick welding. |
| and the tungsten is touched to the work. During the time | ||||||||||
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| the tungsten is touching the work there is very little volt- | ||||
The ARC CONTROL dial sets the short circuit current | age or current and, in general, no tungsten contamina- | |||||||||||
tion. Then, the tungsten is gently lifted off the work in a | ||||||||||||
arc. Increasing the number from | rocking motion, which establishes the arc. | |||||||||||
increases the short circuit current and prevents sticking of |
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the electrode to the plate while welding. This can also | When in the TOUCH START TIG mode and when a | |||||||||||
increase spatter. It is recommended that the ARC CON- | Amptrol is connected to the | |||||||||||
TROL be set to the minimum number without electrode | PUT dial is used to set the maximum current range of the | |||||||||||
sticking. Start with the dial set at 0. |
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| current control of the Amptrol. | ||||||||
DOWNHILL PIPE Welding |
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| The ARC CONTROL is not active in the TIG mode. To | ||||||||
This slope controlled setting is intended for | STOP a weld, simply pull the TIG torch away from the | |||||||||||
tion" and "down hill" pipe welding where the operator | work. When the arc voltage reaches approximately 30 | |||||||||||
would like to control the current level by changing the arc | Volts the arc will go out and the machine will reset the | |||||||||||
length. The output CONTROL dial adjusts the full output | current to the Touch Start level. To reinitiate the arc, | |||||||||||
range for pipe welding. The ARC CONTROL dial sets the | retouch the tungsten to the work and lift. Alternatively, | |||||||||||
short circuit current | the weld can be stopped by releasing the Amptrol or arc | |||||||||||
adjust for a soft or more forceful digging arc (crisp). | start switch. |
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Increasing the number from |
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increases the short circuit current which results in a more | The RANGER® 305 D can be used in a wide variety of | |||||||||||
forceful digging arc.Typically a forceful digging arc is pre- | DC TIG welding applications. In general the ‘Touch Start’ | |||||||||||
ferred for root and hot passes. A softer arc is preferred for | feature allows contamination free starting without the use | |||||||||||
fill and cap passes where weld puddle control and deposi- | of a | |||||||||||
tion (“stacking” of iron) are key to fast travel speeds. This | can be used with the RANGER® 305 D. The settings are | |||||||||||
can also increase spatter. |
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| for reference. |
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| TAbLE b.2 |
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| TYPICAL CURRENT RANGES (1) FOR TUNGSTEN ELECTRODES(2) |
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| Tungsten Electrode | DCEN |
| DCEP (+) | Approximate Argon Gas Flow |
| TIG TORCH |
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| Diameter in. (mm) |
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| Flow Rate C.F.H. ( l /min.) |
| Nozzle Size (4), (5) |
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| 1%, 2% Thoriated |
| 1%, 2% Thoriated | Aluminum |
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| Stainless Steel |
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| Tungsten |
| Tungsten |
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| .010 | (.25) |
| (3) |
| #4, #5, #6 |
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| 0.020 | (.50) |
| (3) |
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| 0.040 | (1.0) |
| (3) |
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| 1/16 | (1.6) |
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| #5, #6 |
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| 3/32 | (2.4) |
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| #6, #7, #8 |
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| 1/8 | (3.2) |
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| 5/32 | (4.0) |
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| #8, #10 |
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| 3/16 | (4.8) |
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| 1/4 | (6.4) |
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(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 | |
2% Thoriated |
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.
RANGER® 305D