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WELDING WITH COATED
ELECTRODES (DC MMA)
• Connect the ground lead to the negative (-)
Dinse socket of the generator (pos. 4) and
the ground clamp to the piece which is to be
welded.
• Connect the welding cable to the positive
(+) Dinse socket of the generator (pos. 5) and
correctly fix the coated electrode (filler mate-
rial) on the electrode holder.
Warning: Respect the positive or negative
polarity (DC+, DC-) marked on the packa-
ging of the electrodes you are using.
• While holding the electrode holder, sup-
ply the generator with power by pressing the
start/stop (ON/OFF) button on the rear panel
(pos. A) of the generator. (Warning: The wel-
ding machine will suggest the configurations
used in the previous welding).
• Use the button in pos. 14 to select the elec-
trode welding procedure (MMA).
• Use the SET button in pos. 16 to select
"menu" (red LED on) and scroll through the
welding paramemters allowed in MMA Wel-
ding Mode (Hs/Af e Iw) by pressing the same
button.
• Use the knob in pos. 2 to adjust the pa-
rameters (red LED ON or flashing); the cor-
responding values can be read on the front
panel display in pos. 3.
• Hold SET button in pos.16 for 5 seconds
to activate or exclude the VRD function (red
LED ON or OFF)..
IMPORTANT: For further information on
parameter functions and regulation in
MMA welding, please read the paragraph
on "WELDING PARAMETER CONTROL
PANEL".
• Wait 5 seconds. The generator will exit the
automatic parameter regulation menu.
• If necessary (as consequence of changed
operative conditions), it is possible to change
the already adjusted welding current value
using the knob pos. 2 (lw LED on) or with the
remote control knob if the remote control has
been activated with button pos. 8 (flashing lw
LED).
• The set current value depends on the ap-
plication of the welding, the type of electrode,
its diameter and on the instructions provided
by the electrode manufacturer (and present
on the packaging of the electrodes themsel-
ves).
• The table below contains basic information
34
regarding the range of currents used for each
diameter of electrode.
The following instructions can be useful for
good welding results:
Electrode diameter Welding current
1.5mm
2.0m
2.5m
3.25mm
4.0mm
5.0mm
6.0mm
• Delicately use the electrode (to avoid de-
terioration of the coating) to touch the piece
which is to be welded, to trigger the electric
arc.
• After triggering the arc, keep the electrode
in position at an angle of about 45° and move
it from left to right to control the arc and the
welding range.
• The length of the arc is a function of the
electrode/piece distance.
• Variations on the welding angle may incre-
ase the size of the welding area, improving
the covering capacity of the slag.
• When the welding is completed, allow the
residue to cool down before removing it with
a toe-ended brush.
Warning:
• Protect your eyes;
• Avoid injuries to you and other person-
nel when removing the residue with the
toe-ended brush.
Warning!
A bad start can be caused by dirt on the
material to be welded, by the incorrect
connection between the ground lead and
the piece to be welded, or by the impro-
per fixing of the electrode holder.
WELDING QUALITY
The quality of the welding depends mainly on
the skill of the welder, the type of welding (pi-
ping, plates etc) and the quality of the electro-
de. Prior to welding, select the most suitable
model and diameter of electrode, being par-
ticularly careful regarding its thickness, the
composition of the metal to be welded and
the welding position (flat, front, descending/
ascending vertical etc).
30A - 50A
40A - 85A
75A - 105A
100A - 155A
135A - 180A
180A - 260A
235A - 320A
Tab.4
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