5
•
With the welding power source switched off:
- Connect the ground cable to the snap-on connector
(positive).
- Connect the relative ground clamp to the workpiece or
to the workpiece support in an area free of rust, paint,
grease, etc..
- Connect the TIG torch power cable to the snap-on con-
nector marked - (negative).
- Connect the torch gas tube to the connection (Pos. 3,
Fig. A).
- Insert the torch button connector in the 6 poles holder
(Pos. 4, Fig. A).
2) Switch the welding power source on by moving the power sup-
ply switch to
I
(Pos. 6, Fig. A).
3) Make the adjustments and select the parameters on the con-
trol panel.
TIG WELDING WITH “Lift” TYPE STRIKING
4a) Open the gas cylinder and flow regulator (8-14 l/min).
5a) Put the electrode at the point at which welding is to begin, put
the TIG torch at an angle so that the edge of the gas nozzle
is not on top of the piece to be welded, keeping contact be-
tween the point of the electrode and the piece to be welded
(Fig. C-1).
6a) Press the torch button.
7a) The “Lift” function strikes the arc when the TIG torch electrode
comes into contact with the workpiece and is then removed
(Fig. C-2)
8a) Carry out TIG welding (Fig. C-3).
To end welding:
•
Lift the torch slowly, at a certain point the welding current
decreases, and then stop.
•
The welding power source follows an automatic down slope
along with extinguishing of the arc.
9a) When finished welding remember to shut off the gas cylinder.
TIG WELDING WITH HIGH FREQUENCY STRIKING (HF)
4b) Open the gas cylinder and flow regulator (8-14 l/min).
5b) Put the electrode at the point at which welding is to begin, put
the TIG torch at an angle so that the edge of the gas nozzle is
not on top of the piece to be welded, keeping a 2-3 mm gap
between the point of the electrode and the piece to be weld-
ed (Fig. D-1).
6b) Press the torch button.
7b) The voltaic arc strikes even without contact between the TIG
torch electrode and the workpiece (Fig. D-2).
8b) To continue welding put the torch back in its normal position
(Fig. D-3).
9b) When finished welding remember to shut off the gas cylinder.
IMPORTANT: The high frequency switches off automatically af-
ter switching on.
PART TO BE WELDED
The part to be welded must always be connected to ground in or-
der to reduce electromagnetic emission. Much attention must be
afforded so that the ground connection of the part to be welded
does not increase the risk of accident to the user or the risk of dam-
age to other electric equipment. When it is necessary to connect
the part to be welded to ground, you should make a direct con-
nection between the part and the ground shaft. In those countries
in which such a connection is not allowed, connect the part to be
welded to ground using suitable capacitors, in compliance with the
national regulations.
WELDING PARAMETERS
Table 3 shows the currents to use with the respective electrodes
for TIG welding. This input is not absolute but is for your guidance
only; read the electrode manufacturers’ instructions for a specific
choice. The diameter of the electrode to use is directly proportion-
al to the current being used for welding.
Table 3
Ø ELECTRODE (mm)
CURRENT (A)
1,2
1,6
2,4
3,2
4,0
10 ÷ 80
70 ÷ 150
140 ÷ 250
225 ÷ 400
300 ÷ 500
Before use, sharpen the tungsten electrode, forming a tip about
1,5 times its diameter.
2000HA73
2000HA72
FIG. C
FIG. D
FIG. B
α
FIG. E
If the electrode comes into contact with the work-
piece, the point must be formed again.
The point on the electrode must be shaped as
shown in the figure.
α (°)
CURRENT (A)
30
60 ÷ 90
90 ÷ 120
0 ÷ 30
30 ÷ 120
120 ÷ 250
Summary of Contents for DIX TIG GO 1406.M HF
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