Lincoln IM985 manual Wire WELDING-CV, ARC Gouging, TAbLE b.4, Table b.3 Typical Current Ranges

b-9 OPERATION b-9

WIRE WELDING-CV

Connect a wire feeder to the AIR VANTAGE® 500 KUBOTA according to the instructions in INSTALLATION INSTRUC- TIONS Section.

The AIR VANTAGE® 500 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 CON- TROL 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 KUBOTA can be used for arc gouging.

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.

TAbLE b.4

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*

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

*Maximum current setting is limited to the AIR VANTAGE® 500 KUBOTA maximum of 575 Amps.

		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%	1%, 2%					TIG TORCH
Diameter			Thoriated	Thoriated	Aluminium		Stainless Steel		Nozzle
mm (in)			Tungsten	Tungsten					Size (4), (5)
.25	(0.010)		2-15	(3)	2-4	(3-8)	2-4 (3-8)		#4, #5, #6
.50	(0.020)		5-20	(3)	3-5	(5-10)	3-5	(5-10)
1.0	(0.040)		15-80	(3)	3-5	(5-10)	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.

AIR VANTAGE® 500 KUbOTA