Fimer QUEEN 210, Instruction Manual

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14
in this mode. However, the
following instructions may
help you achieve
6- If during welding the arc tends to
decrease excessively, turn knob 7 of
Figure fig1 anti-clockwise to reduce the
wire speed, which will also decrease the
weld pool. If, on the other hand, the arc
tends to over-lengthen, turn the knob
clockwise.
7- If there is too much splatter while
welding, the electronic inductance
parameter needs to be increased. Do so
turning knob 6 of Figure 1 clockwise. If
maintaining an arc is difficult, turn the
knob anti-clockwise.
8.3 MMA WELDING
8.3.1 Description
Electric MMA (Metal Manual Arc) and SMAW
(Shielded Metal Arc Welding) are both manual
procedures exploiting the heat generated by
an electric arc that is produced when covered
welding electrodes make contact with the
workpiece. It is commonly used due to its
versatility. In fact, welding jobs can be
performed anywhere: in a workshop, in the
open, in confined spaces or hard to reach
areas. A wide range of electrodes are
available, suiting all requirements.
The arc is generated touching the electrode
to the workpiece.
The potentiometer knob (Fig. 1 –8) regulates
the welding current (thicker workpieces
require higher current settings).
8.3.2 MMA Welding Features
While welding the following features come into
effect:
Arc Force: Whenever the arc tends to drop
the microprocessor automatically increases
the welding current in order to maintain and
stabilise the arc.
Hot Start: The arc is generated touching the
electrode to the workpiece. To ensure the arc
is generated efficiently, the microprocessor
increases the welding current for app. one
second, guaranteeing fast, safe arc
generation.
Antisticking: Decreases the welding current
up to minimum, when the operator makes a
mistake causing the electrode to stick to the
workpiece. The electrode can be removed
from its clamp without causing damaging
sparks.
8.3.3 MMA Welding
Fig 8 Welding current at the electrode diameter
Proceed as follows for MMA welding:
1.
Using knob 8 (Fig.1) select the welding
current according to the type of electrode and
the thickness of the workpiece. The welding
current value is shown on display panel 13. The
knobs 6 and 7 (fig.1) are disabled. Guidance
values suitable for various electrode diameters
are provided in Fig 8
2. Connect the earth clamp to the workpiece.
3. Place the electrode in the clamp.
4. During the entire welding process maintain
a 3-4mm distance from the welding pool that
has been created. Weld using small zigzag
movements so as to be able to regulate the
size of the weld as desired.
5. Remove the electrode from the workpiece
to stop welding.
Diametro (mm) Corrente (A)
1.6 35-50
2.0
40-70
2.5
60-100
3.25 80-140
4.0
120-170
5.0
180-250