Tig Welding - CEA MATRIX X220 AC/DC 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 out-
side, using an arc ignited by a tungsten electrode. The molten bath and the electrode are protected by and inert gas (for example, Ar-
gon). 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 connector 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 machine on by moving the power supply switch to I (Pos. 7, Fig. A).
3) Make the adjustments and select the parameters on the control panel (for further information see the 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 between 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)
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Fig. D
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.
Fig. C
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2000HA73