STAYER WELDING POTENZA TIG 170 HF GE Manual De Instrucciones página 39

2. Electric intensity of the high half-wave of the pulse. Refer
(in this manual) to the table of working intensities and apply,
according to the material, the thickness of the piece, penetration,
finishing and joint type.
3. Electric intensity of the low half-wave of the pulse. It is normally
between 20% and 50% of the intensity of the high half-wave.
4. Duty cycle respect to pulse width. This is the ratio between the
width of the high pulse and the low pulse. Usual ratios are 40%
pulse versus 60% base.
Bear in mind that nominal amperages will be higher in order to
achieve an effective amperage equivalent to standard welding.
In single-pulse-per-drop mode, you must bear in mind that the
4 factors are intimately related. Prior to production welding, test
the advance of the filler rod per each drop, and the excess or
lack of fusion in accordance with the intensities of pulse and
base and the duty cycle thereof. Higher intensities allow a higher
speed in exchange of a greater difficulty in controlling the weld
puddle and a decrease of the life of the tungsten electrode.
SETTING OF THE DIRECTION OF THE WELDING ARC
Select the direction of the electric current of the welding arc
using button 16.
• Select alternating current (AC) for welding aluminium,
magnesium and alloys thereof.
• Select direct current (DC) for steels and the rest of materials.
Alternating current facilitates welding on material having high
surface fusion temperatures while having low fusion temperature
in their insides. A portion of the half-wave is used to strip and
penetrate the material, and the other to effectively fuse the mass
thereof.
SETTING. The alternating (AC) mode is defined by parameters
12, 13 and 14:
1. Duty cycle with respect to pulse polarity (clean width) to obtain
greater cleanliness in exchange for smaller penetration and vice
versa. You may modify the width within a time range of -40% to
+ 40%.
2. Wave balance with respect to polarity change. It allows moving
the polarity volume from -20% to +20% depending on the needs
of the stability of the welding arc cone (opening it or closing it), of
the advancing speed and cleanliness.
3. Alternating welding current frequency. 20 Hz to 100 Hz. Use
low frequency to achieve wider beads, and in reconstruction
operations. Use high frequency to penetrate into narrower beads.
In turn, the alternating mode (AC) mode may be pulsed to provide
special features, such as facilitating drop-per-drop filling, caloric
control or improved surface finishing. This mode produces pure
square wave without any passing time and excellent cleanliness.
DIAGNOSIS TIG AC/AC:
Error code in TIG AC/DC
804 Thermal Protection
805 Broken torch, switch short
806 Water loss
ENGLISH
39
Model TIG200HF P
Type of welding
Press button 2 to check one of the 3 available types of work:
Coated electrode (will light No. 11), normal TIG (will light No. 12)
or pulsed TIG (will light No. 13). The normal TIG it will be used
in simple cases and easy to apply while that pulsed TIG can be
used for more delicate jobs or where economic control of the
contribution is important of heat or the rate of drop transfer.
Welding function
The parameters of each function are selected with the button
No. 4. Pressing it selects the parameter, which will appear on the
SCADA scheme on the control panel (led lights number 14) to
24). By turning it the amount of the selected quantity is selected
looking at the main display # 1.
Different functions can be applied to each type of welding by
pressing function button # 3. The TIG can work with simple action
of trigger in two normal times (2T, nº 5) or two times with ramps
(SLOPE 2T, nº 9) for a creation / progressive disappearance of
the contribution of arc intensity of welding. By pressing the button
No. 3 progressively you can select the 4T function, number 6,
which includes control parameters total over work as gas preflow
time (nº 14), arc-striking current (No. 15) and rise time of amps
from the starting current and working well in simple mode (no.
12) or in pulsed mode (no. 13). With the mode 4 repetition times
(REPEAT 4T, nº 9) cycles are established of work in which the
fourth time is linked to the first.
In these conditions the process is only interrupted by raising the
torch to physically cut the bow.
With the SPOT function, no. 10 welding current is produced
during the preset time as a parameter, from 0.1 sg up to 50 sg.
When the trigger is pressed the equipment will continue to deliver
current during that time until the time passes of the established
point.
With the VRD (voltage reduction device) function, reduces the
vacuum voltage of electrode welding to improve the security that
may be needed in environments or situations special The price
to pay is a slight worsening of the initial arcing, so if it is not
required it is recommended not have it activated.
The pulse parameters are the peak current, No. 17 which is the
that really melts and the base one, nº21 that is the one that keeps
I live the arch without hardly adding unnecessary heat.
Para optimizar la calidad de soldadura se puede jugar con otros
dos parámetros que permiten cambiar el carácter del arco y el
aporte de calor. Son la frecuencia, nº17, del pulso en ciclos por
cada segundo (Hz) y el reparto en porcentaje entre la corriente
de pico y de base, nº 18.
Por último, se pueden ajustar dos parámetros de respuesta
dinámica de arco en modo electrodo recubierto. Son la fuerza de
arco, arc force, nº26 de manera que se aumentará para electrodos
tipo celulósico o aluminio y se disminuirá para electrodos de
respuesta más suave tales como el rutilo. Con la familia de los
electrodos básicos se recomienda empezar a probar en ajuste
intermedio. El último parámetro, impulso de arranque, u Hot
Start, nº 27 ARC START, establece un incremente breve de
potencia justo al cebar el electrodo y permite iniciar el electrodo
sin que se quede pegado antes de entrar en el régimen normal
de fundición.
39