Tig Welding - STAYER WELDING TIG AC/DC 190HF PULSED Mode D'emploi

ones and high cellulosic ones. Find the smallest increment that
allows the electrode not to stick and the arc is not interrupted.
If the value is excessive, too many projections may appear that
will spoil your work.
TIG welding parameters settings
Introduction
The practical operation of real work is far from what can be
taught in a simple instruction manual of a machine.
To take full advantage of the benefits of this equipment,
professional preparation in regulated teaching centers is
essential.
TIG DC welding is welding in which current is used without
polarity change. It is mainly used for welding steels.
TIG AC welding is welding in which current is used with a change
of polarity. It is mostly used to weld aluminium.
4.5.2 Shielded electrode welding
In this class of electric arc welding, the electrode itself produces
heat in the form of an electric arc, the shielded environment,
and it improves the weld puddle and the filler metal itself as the
electrode's metal core progressively melts as welding is carried
out.
You have to choose the electrode (size and type) that is suitable
for carrying out the work to be performed. An electrode we
recommend due to its medium quality, suitability for most works
and for being easy to find, is the E-6013 electrode, popularly
known as the "rutile electrode". The material par excellence for
welding with shielded electrode is carbon steel. The following
table may serve you as an initial orientation for electing the kind
of electrode and operation amperage setting for a S275-type
medium carbon steel.
After having confirmed all safety measures and inspected the
equipment, cleaned, prepared and fastened the piece to be
welded, cables are connected according to the indications in the
tables. For the usual case of an E-6013 electrode, the output of
negative polarity (marked -) shall be connected to the piece by
means of the grounding clamp. The output of positive polarity
(marked +) shall be connected to the electrode carrier clamp
which shall have the working electrode connected to its bare
end.
The welder will put on his/her individual protective equipment
using a welding mask or helmet that is suitable for the work and
suitably covering any portion of his/her skin to avoid splashes or
radiation.
Welding shall be started by priming the arch. There are several
proceedings, the simplest of which is scratching the piece.
Once the arc has commenced, the electrode shall be kept at a
distance approximately equal to the diameter of the electrode
itself, and advancing of the weld shall be commenced by drawing
backwards as if a right-handed occidental person started writing,
The electrode shall be held in a position close (65o to 80o) to
the vertical with respect to the horizontal and balanced with
respect to weld puddle center. Depending on the kind of weld
pass (initial or filling) and the need of covering the joint, advance
in a straight line, zigzag movement or small circles. Good setting
of intensity, position and advance speed of the weld will result
in a pleasant, gentle sound, similar to that of a good barbecue
roast. When performing an accurate work, the resulting bead will
be homogeneous, with uniform surface marks shaped as half
moons.
Once the bead has been made, remove slag with a hammer and
brush before making the subsequent bead.
ENGLISH
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4.5.3.- TIG welding

In electric arc welding by means of an inert-gas-protected
tungsten electrode, the consumable material is not the electrode
itself but a filler rod of a material similar to, or compatible with
the material to be welded. Compared with the shielded electrode
system, this system has greater productivity and greater
difficulty in exchange for very high weld quality regarding almost
any metal and alloys thereof, including all stainless steels and
situations of joints of low thickness with or without filler material.
Welding takes place without slag, projections or smoke.
Do neither use nor sharpen thorium-doped tungsten
electrodes with a red mark, because of the risk
derived from the moderate radioactive activity of
the material. You may recognize the presence and
concentration of thorium dioxide by the indicative strip on
the electrode according to EN ISO 68848:2004 (colors:
yellow, red, purple and orange). Avoid these electrodes and
use substitute products without contents as for example
electrodes with lanthanum and cerium derivatives (strips:
black, grey, blue, gold) which do not have radioactive
activity.
Prepare the electrode by sharpening the tip with the emery stone
in such a way that a cone with a height of approximately 2 times
the electrode's diameter remains. For a better arc and current
handling capacity, the correct attack of the tip on the stone must
be longitudinal and the tip must be slightly flat.
In order to correctly position the electrode in the torch, it must
protrude about 5 mm above the nozzle.
As a general rule, connect the output inversely than the usual
connection of the electrode i.e. the TIG torch to the equipment's
negative terminal and the grounding clamp to the positive
terminal. Prepare and secure the piece.
As a general rule, supply pure argon at a flow of 6-7 l / minutes.
Adjust current intensity in accordance with the needs of the kind
of material and the joint to be made, making first a test on a test
piece. Refer to tables 5 and 6, specialized literature or regulated
professional training for further information in respect hereof.
The torch shall receive inert gas supply (usually pure argon)
proceeding from a cylinder, through a pressure reducing system
capable of suitably regulating the necessary gas flow volume.
4.5.4.- ADVANCED TIG WELDING
This applies to models TIG AC/DC 250HF and TIG AC/DC
200HF
WELDING PARAMETER SETTING
The welding parameters are selected by sequentially pushing
button/control 19. Parameter magnitude is precision adjusted by
moving control 20. When, in addition to rotating control 20, you
push it while rotating, you may quickly increase or decrease the
value.
The machine is provided with an EEPROM memory so that the
machine's settings are preserved when it is turned off.
In order to know the setting range of each parameter, please
refer to the table of extended technical features at the beginning
of the manual. Functionally, the parameters are:
1. Gas discharge time before appearance of the electric arc (pre-
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