EINHELL 15.749.75 Manual De Instrucciones Original página 29

the cam pin (C) is engaged in the cam opening in
the wire spool (O). The spool lock (A) must enga-
ge again over the wire spool (N). (Fig. 27)
Inserting the welding wire and adjusting the
wire guide (Fig. 30-36)
•
Push the pressure roller spring (K) upwards
and swing it forwards (Fig. 30).
•
Pull the pressure roller holder (J) with the
pressure roller (I) and pressure roller spring
(K) downwards (Fig. 31).
•
Undo the screws for the feed roller holder (E)
and pull off the feed roller holder (F) upwards
(Fig. 32).
•
Check the feed roller (G). The appropriate
wire thickness must be specified on the top of
the feed roller (G). The feed roller (G) is fitted
with two guide grooves. Turn the feed roller
(G) over if necessary or replace it. (Fig. 33)
•
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. 34) 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. 36)
•
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. 35).
•
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. 36)
•
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
GB
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. 1/14). We recommend that you start the
setting work at level 5 which is the middle value,
and then adjust it from there. The required 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
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. 28/K) on the wire feed unit to prevent
unnecessary wire wear (Fig. 5.4.3). Connect to
the mains outlet (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
fl ow. Now set the required gas delivery 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 clamp lever (Fig. 28/K) to the wire feed
unit again.
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