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23GB/IE/NI/CY/MT
Setting appropriate parameters
for current and voltage for weld-
ing aluminium with aluminium
wire.
For welding aluminium we recommend
using lower voltages than you would
use for welding iron/steel. To set the
appropriate voltage range, you can
proceed as follows: prepare the device
as described under “Adaptation of
device to solid welding wire with inert
gas”. To weld aluminium wire select the
setting “1.0/Al(5356)” by pressing the
welding wire selector key
36
. Now press
the voltage reducer selector key
37
, until
the LED next to “U” ashes. Now set
a current of approx. 0.5 A. Press the
voltage reducer selector key
37
, until the
LEDs next to the “U” and A/VRD” are
no longer illuminated. The voltage when
MIG welding can now be adjusted in
a lower voltage range which is more
suited for aluminium welding. If the
rotary switch for adjusting the welding
current
6
is simultaneously pressed and
rotated, then the welding current can
be altered in 10 A steps. As guideline
values, to weld 2 mm aluminium sheet
you can set 14.5 Volt and a current of
91 Amps. The optimum welding settings
should be determined by welding on a
sample workpiece.
CAUTION! Please note that the
torch must always be placed on an
insulated surface after welding.
Always switch off the welding device
after completing welding work and
during breaks and pull the plug from
the mains socket.
Create a weld seam
Forehand welding
Push the torch forwards. Result:
The penetration depth is lower, broader
weld width, fl atter weld bead (visible
surface of the seam) and greater fusion
error tolerance.
Backhand welding
The torch is dragged from the weld
seam (Fig. U). Result: Greater penetra-
tion depth, narrower weld width, higher
weld bead and lower fusion error
tolerance.
Welded joints
There are two-basic types of joints in
welding: Butt welds (outer edge) and
angle welding (inner edge and overlap-
ping).
Butt welds
With butt welds of up to 2 mm material
thickness, the weld edges are com-
pletely brought together.
For greater thicknesses, a gap of
0.5–4 mm must be selected. The ideal
gap depends on the welded material
(aluminium or steel), the material com-
position as well as the type of welding
selected. This gap should be determined
by welding on a sample workpiece.
Flat butt welds
Welds should be made without inter-
ruption and with a suffi cient penetration
depth. Therefore, it is extremely impor-
tant to be well prepared. The quality of
the weld result is affected by: the amper-
age, the gap between weld edges, the
inclination of the torch and the diameter
of the welding wire. The steeper you
hold the torch against the workpiece,
the higher the penetration depth and
vice versa.
Using the device
23


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