SATA AE7022, Instruction Manual

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force and must respect laws concerning accidents.
Check that the wire diameter corresponds to that indicated on the roll and mount the wire coil.
Connect the pipe coming out of the extension with the cylinder flowmeter.
Position the welding machine so as to allow free air circulation inside it and avoid that metal or any other.
4.4.2 THE MACHINE IS READY TO WELD
Connect the ground terminal to the part to be welded.
Turn the machine on.
Extract the conic gas nozzle by rotating it clockwise.
Unscrew the current nozzle.
Press the torch trigger to feed the wire until it comes out from the torch.
WARNING: Keep your face away from the terminal nozzle while the wire comes out.
Screw the current nozzle again, making sure that the hole diameter be the same as that the wire used.
Insert the welding conic gas nozzle by rotating it clockwise. Open the gas cylinder and adjust flowmeter at
8-10L/min.
WARNING: Check that the gas used is compatible with the material to be welded.
4.4.3 WELDING CARBON STEELS.
To weld carbon steels the following things are necessary:
1) The use of a binary shielding gas which is most commonly Argon and Carbon dioxide, in a ratio of 75-80 %
Argon and 25-20% Carbon dioxide. Some applications, however, may require a mix of three gases: Argon,
Carbon dioxide (CO
2
), and dioxide (O
2
). These gas mixtures generate heat during welding and as a result the
weld bead will be well filleted and neat in appearance. The penetration, however, will not be deep.
The use of Carbon dioxide as the shield gas results in a narrow weld bead with deep penetration but the
ionization of the gas will have an influence on arc stability.
2) The use of a filler wire of the same quality as the steel to be welded. It is recommended that high quality
wires be used and that welding with rusted wires be avoided because they can give rise to defects in the
weld bead. Generally, the current range within which a wire can be used is calculated in the following
manner:
Ø of wire x 100= minimum number of Amperes.
Ø of wire x 200= maximum number of Amperes.
Practical example: 1.20 Ø wire= 120 Amps minimum and 240 Amps maximum. These amperages are based on
the use of an Argon/CO2mixture as the shield gas and welding in the Short Arc transfer mode.
3) Avoid welding on rusted work pieces or work having spots of oil and grease present on the surface.
4) The use of a welding torch suitable to the welding currents that are going to be used.
5) Periodically check that the two handles making up the ground clamp are not damaged and that the
welding cables (torch cable and the work return lead) do not have any cuts or burn marks that would reduce
their efficiency.
4.4.4 WELDING STAINLESS STEEL
Welding stainless steels in the 300 series (the austenitic series) must be done using a shield gas mixture of
predominantly Argon with a small percentage of O2 added to stabilize the arc. The recommended mixture is
AR/O2 in the ratio of 98/2. Do not use CO2 or AR/CO2mixtures as the shield gas.
Do not touch the welding wire with your bare hands.
The filler metal (the wire) must be of a higher quality than the work to be welded and the weld area must be
clean.