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Welder Operation
Duty Cycle
Duty Cycle is the the ratio of the uninterrupted on-load duration to
10 minutes. The total time period of one complete on-load and
no- load cycle is 10 minutes. For example, in the case of a 60%
duty cycle, load is applied continuously for 6 minutes followed by
a no- load period of 4 minutes.
Stick CC Mode
The Titan is designed for horizontal, vertical up and overhead
welding with all types of DC stick electrodes, especially cellouse
and low hydrogen.
CAUTION
Safe working practices should always be followed.
Tungsten
Electrode
Thoriated
Diameter
Tungsten
mm (in)
.25 (0.010)
.50 (0.020)
1.0 (0.040)
1.6 (1/16)
2.4 (3/32)
3.2 (1/8)
4.0 (5/32)
4.8 (3/16)
6.4 (1/4)
750-1000
(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
1% Thoriated
2% Thoriated
Though not yet recognised 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.
IM 6004
Table B.3 Typical Current Ranges
For Tungsten Electrodes
DCEN (-)
DCEP (+)
1%, 2%
1%, 2%
Thoriated
Tungsten
2-15
(3)
5-20
(3)
15-80
(3)
70-150
10-20
150-250
15-30
250-400
25-40
400-500
40-55
500-750
55-80
80-125
EWP
EWTh-1
EWTh-2
Scratch Start TIG
The Titan can be used for Scratch-Start of DC TIG welding
applications.
To initiate a weld, the course and fine output control knobs must
be set for the desired current. the tungsten electrode is then
scratched on the work which establishes the arc.
To stop the arc, simply lift the TIG torch away from the work piece.
The tungsten may then be scratched on the work piece to restrike
the arc.
The Titan 701 can be used in a wide variety of DC TIG welding
applications. If a high frequency start is desired, the K930-2 TIG
Module can be used with the Titan 701. The settings are for
reference.
The Titan will need equipping with R.F. bypass circuitry when the
connection of high frequency generating equipment is required.
Note: A 230V to 115V transformer (150kVA) will also need to be
fitted to the Titan to provide input power to K930-2 TIG Module.
The Titan and any high frequency generating equipment must be
properly grounded. See the K930-2 TIG Module operating
manuals for complete instructions on installation, operation, and
maintenance.
When using the TIG Module, the OUTPUT control on the Titan is
used to set the maximum range of the CURRENT CONTROL on
the TIG Module or an Amptrol if connected to the TIG Module.
(1)
(2)
Approximate Argon Gas Flow Rate
l/min (c.f.m.)
Aluminium
2-4 (3-8)
3-5 (5-10)
3-5 (5-10)
3-5 (5-10)
6-8 (13-17)
7-11 (15-23)
10-12 (21-25)
11-13 (23-27)
13-15 (28-32)
(4)
TIG torch nozzle "sizes" are in multiples of 1/16ths of an
inch:
# 4 = 1/4 in.
# 5 = 5/16 in.
# 6 = 3/8 in. 10 mm
# 7 = 7/16 in.
# 8 = 1/2 in.
#10 = 5/8 in.
(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.
Titan 701
TIG TORCH
Stainless Steel
Nozzle
Size
2-4 (3-8)
#4, #5, #6
3-5 (5-10)
3-5 (5-10)
4-6 (9-13)
#5, #6
5-7 (11-15)
#6, #7, #8
5-7 (11-15)
6-8 (13-17)
#8, #10
8-10 (18-22)
11-13 (23-27)
6 mm
8 mm
11 mm
12.5 mm
16 mm
Page 15
,
(4)
(5)
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