Starting the welding process
• Fit the required
welding shoe (5)
according to the paragraph „Change of welding shoe” (see page 15).
• Welding can begin once the operating temperature has been attained. Operate the
drive on/off switch (4)
for
this purpose. Operate the tool only when feeding welding rod.
• Feed welding rod into the
welding rod opening (6)
(see chapter welding rod) and allow a small amount plasti-
zised material to escape.
CAUTION! Never feed welding rod into both welding rod openings at the same time!
(see page
13 «Starting protection»).
The welding rod fed must therefore be clean and dry.
• The extrusion rate can be changed using the
extrusion rate regulation potentiometer (7)
dependent on the
seam geometry and the choice of material.
• Interrupt material extrusion using the
drive on/off switch (4)
.
• Direct the
pre-heating nozzle (21)
to the welding zone.
• Pre-warm the welding zone with back and forth movements.
• Position the tool on the prepared welding zone and operate
the
drive on/off switch (4)
.
• Carry out test welding and analyse.
• Adjust the hot air temperature using the
air temperature potentiometer (2)
and the extrusion rate with the
extrusion rate regulation potentiometer (7)
as required.
• In case of a prolonged welding process, the
drive on/off switch (4)
can be held in the active state with the
locking device (3).
• The welding rod is pulled in through the
welding rod opening (6)
automatically after starting. The welding rod
pull - in must not be impeded.
• Release the
locking device (3)
by briefly pressing the
drive on/off
switch (4)
and then letting go. Remove welding material from the
welding shoe in order to avoid damage on the welding shoe when
starting the next time.
• The tool must only be laid down on the
tool rest (8)
.
Use a fireproof base.
The hot air jet must not be directed towards
persons and objects.
• The
air temperature potentiometer (2)
to „0“. Let the tool cool down.
• Switch off at the
hot air blower switch (1).
Switching off
Checking the temperature of the extruded material and the pre-heating temperature
• The temperatures of the extruded material and the hot air jet are to be checked at regular intervals when car-
rying out welding work over an extended period:
Fast display electronic temperature measuring devices with the appropriate temperature probes have to
be used. The highest temperature in the hot air jet between the nozzle outlet plane and a depth of 5 mm
is to be determined. The measurement probe must be inserted in the welding shoe in the middle of the
extruded material to measure its temperature.
8
21