Starting The Welding Process; Switching Off - Leister FUSION 2 Instrucciones De Funcionamiento

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 of 3 or 4 mm diameter into the welding rod opening (6) and allow a small amount plastizised
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.

Switching off

• 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 air temperature potentiometer (2) to "0". Let the tool cool down.
• Switch off at the hot air blower switch (1).
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 carrying
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.
14
Heisslufts The hot air jet must not be directed
towards persons and objects.
21
8