Publicidad
Idiomas disponibles
Idiomas disponibles
7
TIG AC
AC welding is used to weld aluminium and aluminium alloys. The procedure involves continuous changes in the
polarity of the tungsten electrode. Two phases are available (half-waves): a positive phase and a negative phase. The
positive phase causes the aluminium oxide layer on the surface of the material to break down (cleaning effect), while
at the same time a cap forms on the tungsten electrode tip. The size of this cap depends on the length of the positive
phase. It should be noted that an over-large cap leads to a diffuse and unstable arc with reduced penetration. The
negative phase cools the tungsten electrode while generating the necessary penetration. It is important to choose the
correct time ratio (balance) between the positive phase (cleaning effect, cap size) and the negative phase (penetration
depth). This requires the AC balance to be set. The factory setting is a zero balance.
To activate the welding process, press pushbutton Q - Fig� 4 on the main screen and then select AC using encoder B�
The AC process parameters can be selected from section V – Fig� 4�
In section N turn knob B to select the parameter to be modified, press the required parameter and adjust the value
by turning encoder B� Once the change has been made, press B to confirm. The parameter can be modified when
it turns red.
52/65
From the main menu, select pushbutton V – Fig� 4, to set the parameters
of the TIG AC process�
NOTICE
Description
AC Balance
Adjust the percentage penetration
in relation to the cleaning phase.
The longer the cleaning phase
(-10), the more the electrode is
rounded.
AC Frequency
Frequency
of
the
alternating
output current
AC Amplitude Adjust
Adjusting the cleaning
penetration peak allows an
improvement in wear and
electrode rounding.
-80 = -80% of penetration peak
+80 = +80% of penetration peak
Min
DEF
Max
-10
0
10
50
90
200
-80
0
80
UM
Sol.
s
0.1
Hz
1
%
1
3301286
Publicidad
