gala gar Smart 400 MMA Manuel Technique D'instructions page 13

1 . Prepare the equipment according to the welding process to be performed. From section 3.3. onwards of
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this manual you will find the equipment preparation diagram according to the work you wish to
2 . Connect the plug to the mains.
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3 . Apply the main switch A for start-up.
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4 . Determine the desired welding process using selector "C".
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5 . Regulate the desired welding current using the potentiometer "D".
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6 . You can now start the welding operation.
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3.3 WELDING WITH COATED ELECTRODE.
When welding with coated electrode we must connect the electrode-holder clamp (F) and the earth clamp
(G) according to the polarity advised by the electrode manufacturer.
Normally, the majority of the electrodes must be placed with straight polarity; that is, the welding electrode-
holder clamp in the negative pole and the earth clamp in the positive pole. However, welding with basic or
special electrodes is usually carried out with reverse polarity; that is, the electrode-holder clamp in positive pole
and the earth clamp in negative pole. We will follow the electrode manufactuer's instructions in each case.
Equipment preparation for the working mode is drawn in the figure; in this case, observe that the polarity used
is inverse, meaning that the welding electrode-holder is connected to the positive pole.
F
3.4 WELDING USING THE TIG PROCEDURE WITH MANUAL GAS AND LIFT ARC CONTROL.
In TIG welding we must only use straight polarity, placing the welding torch in the negative pole.
Additionally, a bottle of gas M (normally Argon) should be located at the installation, which we will connect to
the machine through a pressure reducing valve N, as indicated in figure below.
N
R
M
G
F
USING HIGH FREQUENCY AND HIGH TENSION STRIKING DEVICES CAN DAMAGE
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Installation for COATED ELECTRODE welding.
TIG WELDING WITH MANUAL GAS CONTROL.
THE EQUIPMENT.
SMART 400 MMA
WELDING PROCESS SELECTOR (C):
ELECTRODE MODE. In this working mode you will have the
functions of BARLEYING AID, ARCH FORCE and ANTI-
STICKING adjustable. This makes electrode welding easier and
more effective.
WELDING PROCESS SELECTOR (C):
TIG LIFT-ARC MODE. MANUAL GAS CONTROL.
G- NEGATIVE POLE. TIG WELDING TORCH.
F- POSITIVE POLE. EARTH CLAMP.
M- GAS BOTTLE (ARGON).
N- PRESSURE REDUCING VALVE.
R- TORCH GAS HOSE.
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carry out.