24 GB/IE/NI/CY/MT
Set the required welding parameters depending on the welding method selected.
Guide the torch nozzle 8 to the position on the workpiece that is to be welded.
Press the torch button 9, in order to feed the welding wire. Once the electric arc is burning,
the device feeds welding wire into the weld pool.
You can work out the ideal settings for the welding current by carrying out trial welds on a test
piece. A properly set electric arc has a mild, uniform buzzing sound.
In case of a rough or hard rattle, switch to a higher power level (increase welding current).
If the welding lens is big enough, the torch 10 is slowly guided along the desired edge. The distance
between the torch nozzle 8 and workpiece should be as small as possible (it must not be greater
than 10 mm).
If necessary, oscillate a little to increase the size of the weld pool. For inexperienced welders,
itis often difficult initially to create a decent electric arc. To do so, the welding current must be set
correctly.
The penetration depth (corresponds to the depth of the welding seam in the material) should be as
deep as possible without allowing the welding pool to fall through the workpiece.
If the welding current is too low, the welding wire will not melt properly. Consequently, the welding
wire repeatedly dips in the welding pool as far as the workpiece.
The slag can only be removed from the seam once it has cooled down. To continue welding an
interrupted seam:
First remove the slag at the starting point.
The arc is ignited in the weld groove, guided to the connection point, melted properly and finally
the weld seam is continued.
CAUTION: Please note that the torch must always be placed on an insulated surface after
welding.
Always switch off the welder after completing welding work and during breaks and pull the mains
plug from the power socket.
zCreating a weld seam
Forehand welding
Push the torch forwards. Result: The penetration depth is lower, broader weld width, flatter weld bead
(visible surface of the seam) and greater fusion error tolerance.
Backhand welding
The torch is dragged from the weld seam (Fig. V). Result: Greater penetration 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 overlapping).
Butt welds
With butt welds of up to 2 mm material thickness, the weld edges are completely 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 composition 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 interruption and with a sufficient penetration depth. Therefore, it is
extremely important to be well prepared. The quality of the weld result is affected by: the amperage, 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.
