OM-235 241 Page 20
5-8.
Pulse Control
956.142.656
.
Pulse welding is only
available while using the
TIG process.
1
Pulse Control LEDs
2
Setup Control
3
Decrease Control
4
Increase Control
5
Ammeter And Parameter
Display
While pulse welding, the cur-
rent is alternating between a
peak current (A) and a back-
ground current (Ab), with a
defined percent (%) of peak
current, and a defined fre-
quency (Hz). Full control of
these parameters gives the
operator better control of pen-
etration, bead width, heat in-
put, crowning, and undercut-
ting.
Press Setup control to select
desired parameter, indicated
by illuminated LED.
Use the Increase/Decrease
controls to change value of
selected pulse parameter.
Peak Current (A) controls
weld penetration, and the min/
max values were established
during Initial Setup (see Sec-
tion 5-2).
Pulse Frequency (Hz) con-
trols weld bead appearance.
Minimum value is 0.1 Hz,
Maximum value is 10 or 500
Hz, the default is 10 Hz. Max-
imum pulse frequency is de-
termined by type of power
source. Thyristor, engine driv-
en, and old inverter power
sources are capable of only a
10 Hz maximum, while newer
inverters may be capable of
up to 500 Hz.
Background Current (Ab)
controls heat input, and the
min/max values were estab-
lished during Initial Setup (see
Section 5-2).
Duty Cycle (%) controls weld
puddle cooling. The minimum
value is 5%, the maximum
value is 95%, and the default
is 50%.
2
3
5
4
1
