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B-7

OPERATION

B-7

BREAK-IN PERIOD

 

Constant Current (CC-STICK) Welding

 

Any engine will use a small amount of oil during its “break-

The CC-STICK position of the MODE switch is designed

in” period. For the diesel engine on the Ranger 305D,

break-in is about 50 running hours.

 

for horizontal and vertical-up welding with all types of

 

electrodes, especially low hydrogen. The OUTPUT con-

Check the oil every four hours during break-in, and

trol dial adjusts the full output range for stick welding.

change both oil and oil filter at 50 hours of operation.

The ARC CONTROL dial sets the short circuit current

Change the oil every 75 hours thereafter and the oil filter

(arc-force) during stick welding to adjust for a soft or crisp

every 150 hours. For more details, see the

Maintenance

arc. Increasing the number from -10(soft) to +10(crisp)

section of this manual.

 

increases the short circuit current and prevents sticking of

 

the electrode to the plate while welding. This can also

During break-in, subject the Ranger 305D to moderate

increase spatter. It is recommended that the ARC CON-

loads. Avoid long periods running at idle. Before stopping

TROL be set to the minimum number without electrode

the engine, remove all loads and allow the engine to cool

sticking. Start with the dial set at 0.

 

several minutes.

 

DOWNHILL PIPE Welding

 

STICK WELDING

 

This slope controlled setting is intended for "out-of-posi-

 

tion" and "down hill" pipe welding where the operator

The Ranger 305D can be used with a broad range of DC

would like to control the current level by changing the arc

stick electrodes.

 

length. The output CONTROL dial adjusts the full output

The MODE switch provides two stick welding settings as

range for pipe welding. The ARC CONTROL dial sets the

short circuit current (arc-force) during stick welding to

follows:

 

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 depo-

 

 

sition (“stacking” of iron) are key to fast travel speeds.

TABLE B.2 - TYPICAL CURRENT RANGES1 FOR TUNGSTEN ELECTRODES2

 

 

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

 

3-8

(2-4)

 

 

3-8

(2-4)

 

#4, #5, #6

 

 

0.010

(.25)

 

2-15

3

 

 

 

 

 

 

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)

 

#5, #6

 

 

1/16

(1.6)

 

70-150

10-20

 

5-10

(3-5)

 

 

9-13

(4-6)

 

 

 

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)

 

#8, #10

 

 

5/32

(4.0)

 

400-500

40-55

 

21-25

(10-12)

 

 

13-17

(6-8)

 

 

 

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)

 

 

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

 

 

 

 

 

 

 

 

 

3

 

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.

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 = 1/2 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

 

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Lincoln Electric SVM175-A BREAK-IN Period, Stick Welding, Table B.2 Typical Current RANGES1 for Tungsten ELECTRODES2
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