HERKULES 15.749.91 Manual De Instrucciones página 22

Anleitung_HSG_190_SPK7:_
GB
Position the feed roller holder (F) again and
secure it.
Remove the gas nozzle (Fig. 5/12) from the
burner (Fig. 5/13) by turning it clockwise,
unscrew the contact tube (Fig. 6/26). (Fig. 5 – 6).
Place the hose package (Fig. 1/11) on the floor
as straight as possible pointing away from the
welding set.
Cut off the first 10 cm of the welding wire to
produce a straight cut with no shoulders, warping
or dirt. Deburr the end of the welding wire.
Push the welding wire through the guide tube (M)
between the pressure and feed rollers (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-pressure
(L) a few turns. (Fig. 34)
Push the pressure roller holder (J) with pressure
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-pressure
(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 specific
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 different 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 final wire feed speed setting can
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be made on the welding wire speed controller (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 quantity 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 infinitely adjusted 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 flow rate, first 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/Welding
current switch (Fig. 1;8) to setting 1; 230 V/400 V
and press the burner switch (Fig. 5/25) to start the
gas flow. Now set the required gas delivery rate on
the pressure reducer (Fig. 4/19).
Turn the rotary knob (Fig. 4/24) counter-clockwise:
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 setʼs 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 connected, 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 flow rate
(see 6.1.1 – 6.1.3) as required.