EINHELL TC-GW190D Originalbetriebsanleitung Seite 29

(G/I) into the hose package mounting (H).
(Fig. 32) Carefully push the welding wire by
hand into the hose package until it projects
out of the hose package by approx. 1 cm at
the burner (Fig. 5/13).
•
Undo the adjusting screw for counter-pressu-
re (L) a few turns. (Fig. 34)
•
Push the pressure roller holder (J) with pres-
sure roller (I) and pressure roller spring (K)
upwards again and attach the pressure roller
spring (K) to the adjusting screw for counter-
pressure (L) again (Fig. 33).
•
Now set the adjusting screw for counter-pres-
sure (L) so that the welding wire is positioned
firmly between the pressure roller (I) and feed
roller (G) without being crushed. (Fig. 34)
•
Screw the appropriate contact tube (Fig. 6/26)
for the welding wire diameter on to the burner
(Fig. 5/13) and fit the gas nozzle, turning it
clockwise (Fig. 5/12).
•
Set the adjusting screw for the roller brake
(D) so that the wire can still be moved and the
roller stops automatically after the wire guide
has been braked.
6. Operation
6.1 Setting
Since the welding set must be set to suit the spe-
cifi c application, we recommend that the settings
be made on the basis of a test weld.
6.1.1 Setting the welding current
The welding current can be set to 6 diff erent
levels using the welding current switch (Fig. 1/7).
The required welding current depends on the
material thickness, the required penetration depth
and the welding wire diameter.
6.1.2 Setting the wire feed speed
The wire feed speed is automatically adjusted to
the current setting. The fi nal wire feed speed set-
ting can be made on the welding wire speed cont-
roller (Fig. 1/29). We recommend that you start the
setting work at level 5 which is the middle value,
and then adjust it from there. The required quanti-
ty of wire depends on the material thickness, the
penetration depth, the welding wire diameter and
also of the size of the gap to be bridged between
the workpieces you wish to weld.
6.1.3 Setting the gas delivery rate
The gas delivery rate can be infi nitely adjusted
GB
on the pressure reducer (Fig. 4/19). It is shown on
the pressure gage (Fig. 4/20) in liters per minute
(l/min). Recommended gas delivery rate in rooms
with no drafts: 5 – 15 l/min.
To set the gas fl ow rate, fi rst release the clamp
lever (Fig. 26/K) on the wire feed unit to prevent
unnecessary wire wear (Fig. 5.4.3). Connecting to
the mains (see point 5.3), set the ON/OFF/Wel-
ding current switch (Fig. 1/7;8) to setting 1; 230
V/400 V and press the burner switch (Fig. 5/25) to
start the gas fl ow. Now set the required gas deli-
very rate on the pressure reducer (Fig. 4/19).
Turn the rotary knob (Fig. 4/24) counter-clockwi-
se:
Lower gas delivery rate
Turn the rotary knob (Fig. 4/24) clockwise:
Higher gas delivery rate
Secure the pressure roller spring (Fig. 26/K) to the
wire feed unit again.
6.2 Electrical connection
6.2.1 Mains connection
See point 5.3
6.2.2 Connecting the earth terminal (Fig.
1/10)
Connect the welding set's earth terminal (10) in
the immediate vicinity of the welding position if
possible.
Ensure that the contact point is bare metal.
6.3 Welding
When all the electrical connections for the power
supply and welding current circuit have been
made and the shielding gas has also been con-
nected, you can proceed as follows:
The workpieces for welding must be clear of
paint, metallic coatings, dirt, rust, grease and
moisture in the area where they are to be welded.
Set the welding current, wire feed and gas fl ow
rate (see 6.1.1 – 6.1.3) as required.
Hold the welding screen (Fig. 3/17) in front of your
face and move the gas nozzle to the point on the
workpiece where you wish to complete the weld.
Now press the burner switch (Fig. 5/25).
When the arc is burning, the welding set will feed
wire into the weld pool. When the weld nugget is
large enough, move the burner slowly along the
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