Lincoln Electric 11587, 11459 Welder Operation, Typical Current Ranges 1 for Tungsten ELECTRODES2

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B-5

OPERATION

B-5

 

 

 

WELDER OPERATION

DUTY CYCLE

Duty Cycle is the percentage of time the load is being applied in a 10 minute period. For example a 60% duty cycle, represents 6 minutes of load and 4 minutes of no load in a 10 minute period.

The RANGER® 305D (CE) 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 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 dial from –10 (soft) to +10 (crisp) increases the short circuit current and prevents sticking of the elec- trode to the plate while welding. This can also increase spatter. It is recommended that the ARC CONTROL be set to the minimum number without electrode sticking. Start with a setting at 0.

DOWNHILL PIPE (STICK) Welding

The DOWNHILL PIPE position of the MODE switch is a slope controlled setting intended for "out-of-position" 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 stick welding. The ARC CONTROL dial sets the short circuit current (arc-force) during stick welding to adjust for a soft or a 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 preferred for root and hot passes. A softer arc is preferred for fill and cap passes where weld puddle control and deposition ("stacking" of iron) are key to fast travel speeds. It is recommended that the ARC CONTROL be set initially at 0.

TIG WELDING

The TOUCH START TIG setting of the MODE switch is for DC TIG (Tungsten Inert Gas) welding. To initiate a weld, the OUTPUT CONTROL dial is first set to the desired cur- rent and the tungsten is touched to the work. During the time the tungsten is touching the work there is very little voltage 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.

To stop the arc, simply lift the TIG torch away from the work piece. When the arc voltage reaches approximately 30 volts, the arc will go out and the machine will automati- cally reset to the touch start current level. The tungsten may then be retouched to the work piece to restrike the arc. The arc may also be started and stopped with an Amptrol or Arc Start Switch. See the following para- graphs.

TABLE B.2

TYPICAL CURRENT RANGES (1) FOR TUNGSTEN ELECTRODES(2)

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.

RANGER® 305D (CE)

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Contents Safety Depends on You Ranger 305D CESafety California Proposition 65 WarningsElectric Shock can kill Welding and Cutting Sparks can Cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a LʼArc28!!!!-2 1# Lincoln Electric Company Vii Viii Thank You Table of Contents Section D Section ESection F 494Installation Safety Precautions Location and VentilationPRE-OPERATION Engine Service TowingVehicle Mounting OILElectrical Connections Auxiliary Power Standby Power ConnectionsWelding Terminals Welding Output CablesConnection of Lincoln Electric Wire Feeders Across The-Arc ModelControl Cable Model Connection of LN-742 and Cobramatic to Ranger 305D CE Operation General DescriptionDiesel Fuel only Figure B.1 Wire Feeder Voltmeter Switch Ground StudGlow Plug Push Button Starting the Engine Stopping the EngineTypical Ranger 305D CE Fuel Consumption Welder Operation Typical Current Ranges 1 for Tungsten ELECTRODES2Constant Current CC-STICK Welding Downhill Pipe Stick WeldingWire WELDING-CV Simultaneous Welding and Auxiliary Power LoadsARC Gouging 8000 Amps 6500 100 5000 150 3500 200 2000  Amps 250Accessories Field Installed Options AccessoriesMaintenance Engine Maintenance Components Kubota D722 Diesel EngineKubota D722 Diesel Engine AIR Cleaner Engine OIL Refill Capacities Without oil filter replacementMaintenance Cooling System Tightening the FAN BeltBleeding the Fuel System Engine Adjustment Battery MaintenanceServicing Spark Arrestor Welder / Generator Maintenance Troubleshooting HOW to USE Troubleshooting GuideAuthorized Field Service Facility LincolnContact your local Lincoln Welding without a control cable Functioning properly / linkage Troubleshooting Field Service Facility Your local Lincoln AuthorizedDiagrams Diagrams Diagrams Diagrams Diagrams Diagrams Diagrams Dimension Print M21086Ranger 305D CE Ranger 305D CE Ranger 305D CE Precaucion Guards off

11587, 11459, 11458 specifications

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