Lincoln Electric INVERTEC V350-PRO IM679-A - Manual (Page 14)

B-3 OPERATION B-3
• The Arc Control regulates the relative Slope of the
process. Slope dynamically controls the force the
arc has to penetrate an open root. At the minimum
setting, Arc Control is very soft and is similar to the
Stick Soft mode. At the maximum setting, the slope
is reduced, the OCV is reduced, and the operator
has full control off the arc force required to pene-
trate an open root joint. For vertical down, open root
pipe welding applications, the recommended setting
is between 8 and 10.
• During welding, a boost circuit increases the avail-
able voltage to minimize pop outs. The boost circuit
is independent of the OCV and only operates when
an arc is lit.
TIG GTAW: The TIG mode features continuous con-
trol from 5 to 425 amps. The TIG mode can be run in
either the TIG touch start or high frequency (optional
equipment required) assisted start mode.
• The Hot Start control selects the starting mode
desired. A setting of less than 5, the TIG lift start
mode is selected. The OCV is controlled below 10v
and the short circuit "TIG touch" current is main-
tained at 25 amps independent of the preset cur-
rent.
When the tungsten is lifted, an arc is initiated and
the output is regulated at the preset value. Hot start
settings between 0 and 5 regulate the arc initiation
current. A setting of 5 results in the most positive
arc initiation. A setting of 0 reduces hot start.
• Hot Start settings between 5 and 10, select high
frequency assisted starting TIG mode. In this
range, the OCV of the machine is controlled
between 50 and 70 volts. If using the Lincoln K930-
1 TIG Module, set the Hot start to 10 for maximum
OCV.
• The Arc Control is not used in the TIG mode.
CV-WIRE: The CV-WIRE mode features continuous
control from 10 to 40 volts. The mode was intended
for most GMAW, FCAW, and MCAW applications.
• The Hot Start control is not used in the CV-WIRE
mode.
• The Arc Control regulates pinch effect. At the mini-
mum setting (-10), minimizes pinch and results in a
soft arc. Low pinch settings are preferable for weld-
ing with gas mixes containing mostly inert gases. At
the maximum setting (+10), maximizes pinch effect
and results in a crisp arc. High pinch settings are
preferable for welding FCAW and GMAW with CO2.
CV-FLUX CORED: The CV-FLUX CORED mode fea-
tures continuous control from 10 to 45 volts. This
mode was designed for self-shielded flux cored wires
that require tight voltage control.
• The Hot Start control is not used in the CV-FLUX
CORED mode.
• The Arc Control regulates pinch effect. At the mini-
mum setting (-10), minimizes pinch and results in a
soft arc. At the maximum setting (+10), maximizes
pinch effect and results in a crisp arc. Most self-
shielded wires work well at an Arc Control setting of 5.
V350-PRO