Operation - EINHELL BT-GW 170 Mode D'emploi D'origine

Anleitung_BT_GW_170_SPK1.qxp:_
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 ON/OFF/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
be made on the welding wire speed controller (Fig.
1/14). 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.
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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. 1/7) to setting 1 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.
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
required edge. Move it to and fro if necessary to
enlarge the weld pool a little.
Find the ideal setting of the welding current, wire
feed speed and gas delivery rate by carrying out a
test weld. Ideally an even welding noise will be
audible. The penetration depth should be as deep as
GB
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