Tig Welding - CEA MATRIX 3000 AC/DC R Operator's Manual

TIG welding

In the TIG process welding is achieved by melting the two metal
pieces to be joined, with the possible addition of material from the
outside, using an arc ignited by a tungsten electrode. The molten
bath and the electrode are protected by and inert gas (for exam-
ple, Argon). This type of welding is used to weld thin sheet metal
or when elevated quality is required.
1) Connecting the welding cables (Fig. C):
• Connect the gas hose to the Argon cylinder.
• With the machine switched off:
- Connect the ground cable to the snap-on connector
marked + (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).
FIG. C
FIG. D FIG. E
6
2) Switch the welding machine on by moving the power supply
switch to I (Pos. 6, Fig. A).
3) Make the adjustments and select the parameters on the con-
trol panel (for further information see the MTA control panel
manual).
TIG WELDING WITH "Lift" TYPE STRIKING
4a) Open the gas cylinder and flow regulator.
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. D-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. D-2)
8a) Carry out TIG welding (Fig. D-3).
To end welding:
• Lift the torch slowly, at a certain point the welding current
decreases, and then stop.
• The welding machine 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.
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. E-1).
6b) Press the torch button.
7b) The voltaic arc strikes even without contact between the TIG
torch electrode and the workpiece (Fig. E-2).
8b) To continue welding put the torch back in its normal position
(Fig. E-3).
IMPORTANT: The high frequency switches off automatically af-
ter switching on.
FIG. F