stayer TIG AC/DC 190 HF PULSED Manual De Instrucciones página 33

When you get to the last one it will continue with the first one in
intuitive circular selection mode.
Button C: Welding Type
MMA: Selects the arc and stick welding mode.
DC: Selects the arc and TIG welding mode in direct current
mode.
AC: Selects the arc and TIG welding mode in alternating current
mode.
DC Pulse: It is the DC mode to which pulse functions are added.
AC Pulse: It is the AC mode to which pulse functions are added.
Button D: Mode Operation
Manages the different modes of operation of the TIG welding
modes
2T: Two-stage welding mode. As a simplified introduction, when
the trigger is pulled there is a welding arc and when it is released,
the welding arc is interrupted.
4T: Four-stroke welding mode. As a simplified introduction when
the trigger is pulled the first time there is a welding arc and
the arc is maintained without holding the trigger down. When
pressed a second time the welding arc is interrupted.
Repeat 2T: It is the 2T mode with repeating functions. For mass
production and automation.
Repeat 4T: It is the 4T mode with repeating functions. For serial
production and automation.
Spot Welding: Spot welding mode. For discontinuous joints by
spot welding.
Button E: ARC Start
Manages arc striking procedures.
HF Start: Non-contact arc starting by injection of high frequency
and high voltage signal for TIG welding mode. Position the
electrode about 2mm from the part to ensure the appearance of
the priming arc.
Lift -ARC: Contact priming for TIG welding mode with minimal
impact on the part. It consists of two phases: touching the part
with the electrode and lifting the electrode to produce the welding
arc.
Anti-Stick: Arc ignition for coated electrode welding. Enables
or suppresses power failure when an electrode makes direct
contact with metal.
Button F: Gas Check / VRD
Gas Check: Opens the gas shut-off valve for TIG welding mode.
It is used to purge the air from the pipes and to check the correct
operation of the gas circuit.
VRD: Activates the 12Vdc welding vacuum voltage reducing
device for stick welding mode.
It is used for certain types of work in which VRD is required. If not
necessary it is recommended to disable the VRD as arc striking
is slightly more difficult.
Auto button:
This button is offered for users who are not trained to use the
machine professionally. Once pressed, only the main welding
current is adjusted and the software application imposes the
most probable welding parameters for that main current.
MMA parameter settings
These are the adjustable parameters in stick welding mode.
Current Ignition: Also known as 'Hot Start'. This is a brief
increase in energy when the electrode starts the arc. It is used to
prevent the electrode from sticking due to cold both the part and
the electrode itself. On the other hand, if a value is set too high, it
may be the case of piercing parts when welding thin thicknesses.
The setting value is in amps.
MMA Current: It is the main welding value. Adjust according
to the type of work taking into account position, type of union,
type of metals, thickness and diameter and type of electrode.
ENGLISH
33
The adjustment value is in amps and this value is the one that
remains on the display by default.
ARC Force: It is the increase in energy that occurs dynamically
while welding is being carried out. Depending on the type of
electrode, a drop break value will be selected that will prevent
the electrode from sticking to the work piece.
Rutile type electrodes usually require low values, medium basic
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.
33