Alarm Light; Stick Welding - Telwin HF Serie Manuel D'instructions Et D'entretien

5.0 INVERTER FUNCTIONS AND
CONNECTIONS
5
7
9
1 Power ON Light

2 Alarm Light

3 LIFT / HF selector switch
4 4 Stroke - 2 Stroke - MMA selector
switch
5 Welding current regulation knob
6 TIG: adjustment of Down-Slope
MMA: adjustment of Arc Force
7 Gas Connector
8 Torch Trigger Lead Connection Socket
9 Negative Dinse Socket
10 Positive Dinse Socket

6.0 STICK WELDING

General information
The electric arc may be described as a
source of bright light and strong heat;
in fact, the flow of electric current in the
gas atmosphere which surrounds the
electrode and the workpiece determines
the radiation of electromagnetic waves
that can be perceived as light and/or
heat depending on their wave length. At
an unperceivable level, the arc also pro-
duces ultra-violet and infra-red light; io-
nizing rays have never been noted. The
heat produced by the arc is used in the
welding process to melt and join metal
parts. The necessary electric current
is supplied by special equipment com-
monly called welding machine.
- Connect the earth cable to the negative
1 2 3 4
6
8
10
pole of the Inverter and the earth clamp to the
workpiece.
- Connect the welding cable to the positive
pole of the Inverter.
- Select MMA Welding Mode using the
Welding Mode Selection Knob (4) on the front
panel.
- Turn unit ON.
- In MMA Welding Mode only two parame-
ters can be adjusted: welding current and Arc
Force.
Welding Current:
• Turn the Welding Current Regulation
Knob (5) to set Welding Current.
The welding current should be chosen following
the instruction given by the electrodes manufac-
turer on the electrode box, but the following in-
dications may be useful as general information:
ELECTRODE DIAMETER
1.5mm
2.0 mm
2.5 mm
3.25 mm
4.0 mm
5.0 mm
Arc Force:
• Set the Arc Force value acting on the
Arc Force adjustment knob (6).
- Protect your face with a mask or a helmet.
Touch, with the electrode fastened, in the
electrode holder, the work piece until the arc
will be struck. (the inverter is featuring "hot
start" to improve the striking.
Avoid hammering the workpiece with the
electrode since it may loose the coating
and increase the arc striking difficulties.
- After striking the arc keep feeding the
electrode into the weld pool with an angle of
about 60° and moving left to right so that you
may control visually the welding. The length
of the arc can also be controlled by lifting or
lowering slightly the electrode. Also a varia-
tion of the welding angle may increase the
size of the weld pool improving the capacity
of surfacing of the slag.
- At the end of the weld let the slag cool off
before removing it, using the brush-hammer.
CAUTION:
Protect your eyes when hitting the slag
with the chip hammer to avoid damages.
WELDING CURRENT
30 A - 40 A
50 A -65 A
70 A -100 A
100 A - 140 A
140 A - 160 A
160 A - 200 A
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