Operation, Wire welding-cv, Arc gouging – Lincoln Electric IM10128 AIR VANTAGE 500 KUBOTA (AU) User Manual

Page 26

For optimal performance, set the MODE switch to ARC
GOUGING. Set the OUTPUT CONTROL knob to adjust out-
put current to the desired level for the gouging electrode
being used according to the ratings in the following Table
B.4

The ARC CONTROL is not active in the ARC GOUGING
Mode. The ARC CONTROL is automatically set to maximum
when the ARC GOUGING mode is selected which provides
the best ARC GOUGING performance.
NOTE: With the VRD switch in the “ON” position there is no
output in the Arc Gouging Mode. For indicator light opera-
tion, see table B.1.

NOTE: If desired the CV mode can be used for Arc Gouging.

* Maximum current setting is limited to the AIR VANTAGE

500(AU)

KUBOTA maximum of 575 Amps.

WIRE WELDING-CV

Connect a wire feeder to the AIR VANTAGE

500(AU) KUB-

OTA according to the instructions in INSTALLATION
INSTRUCTIONS Section.

The AIR VANTAGE

500(AU) KUBOTA in the CV-WIRE

mode, permits it to be used with a broad range of flux cored
wire (Innershield and Outershield) electrodes and solid
wires for MIG welding (gas metal arc welding). Welding can
be finely tuned using the ARC CONTROL. Turning the ARC
CONTROL clockwise from –10 (soft) to +10 (crisp) changes
the arc from soft and washed-in to crisp and narrow. It acts
as an inductance/pinch control. The proper setting depends
on the procedure and operator preference. Start with the
dial set at 0.
NOTE: In the CV-Mode with VRD “On”, the OCV(Open

Circuit Voltage) is not reduced. For indicator light
operation, see table B.1.

ARC GOUGING

The AIR VANTAGE

500(AU) KUBOTA can be used for arc

gouging.

Carbon Diameter

Current Range (DC, electrode

positive)

1/8"(3.2mm)

30-60 Amps

5/32"(4.0mm)

90-150 Amps

3/16"9(4.8mm)

200-250 Amps

1/4"(6.4mm)

300-400 Amps

3/8"(10.0mm)

450-575 Amps*

TABLE B.4

B-9

OPERATION

B-9

AIR VANTAGE

500(AU) KUBOTA

Table B.3 TYPICAL CURRENT RANGES

(1)

FOR TUNGSTEN ELECTRODES

(2)

DCEN (-)

DCEP (+)

Approximate Argon Gas Flow Rate

l/min (c.f.m.)

Tungsten
Electrode

1%, 2%

TIG TORCH

Diameter

Thoriated

Aluminium

Stainless Steel

Nozzle

mm (in)

Tungsten

Size (4), (5)

.25 (0.010)

2-15

(3)

2-4 (3-8)

#4, #5, #6

.50 (0.020)

5-20

(3)

3-5 (5-10)

1.0 (0.040)

15-80

(3)

3-5 (5-10)

1.6 (1/16)

70-150

10-20

3-5 (5-10)

4-6 (9-13)

#5, #6

2.4 (3/32)

150-250

15-30

6-8 (13-17)

5-7 (11-15)

#6, #7, #8

3.2 (1/8)

250-400

25-40

7-11 (15-23)

5-7 (11-15)

4.0 (5/32)

400-500

40-55

10-12 (21-25)

6-8 (13-17)

#8, #10

4.8 (3/16)

500-750

55-80

11-13 (23-27)

8-10 (18-22)

6.4 (1/4)

750-1000

80-125

13-15 (28-32)

11-13 (23-27)

(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 applica-
tions.

(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 =

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 can-

not withstand high temperatures and high duty cycles.