Tig Gtaw; Cv-Wire; Cv-Flux Cored; Hot Start & Arc Control - Lincoln Electric INVERTEC V350-PRO SVM152-A Service Manual

B-4
• 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 cir-
cuit 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 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 ini-
tiation 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
welding 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
features continuous control from 10 to 45 volts. This
mode was designed for self-shielded flux cored wires
that require tight voltage control.
OPERATION
• 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.
8. HOT START and ARC CONTROL features have
different functions depending on the welding Mode
that is active. Each feature is described under the
welding mode heading. (See Item 7 for specified
Mode Operation)

LOWER CASE FRONT

The output studs, line switch and remote connector
are located on the lower case front.
9. Both STUDS contain "Twist-Mate" connector
inserts.
• The Negative stud is configured to accept the
pass through gas system.
10. The ON-OFF switch is a 3-phase circuit breaker
rated at 100 amps per leg.
11. The METER POLARITY switch is located above
the output connectors. The switch provides a
work connection for wire feeder voltmeters.
Place the switch in the position of the electrode
polarity indicated by the decal. The switch does
not change the welding polarity.
12. 6-PIN AMPENOL for remote control.
REMOTE CONTROL of the OUTPUT CONTROL
and WELD TERMINALS
The Invertec V350-Pro has auto sensing of remote
output controls.If after connecting or removing a
remote, the Invertec V350-Pro did not configured the
way you would like the local or remote control set-
tings can be changed by pushing the OUTPUT CON-
TROL or WELD TERMINAL button. (A user cannot
select between the 6 and 14 pin amphenols.)

CV modes

• The remote will default to the 14-pin amphenol
remote if a remote is connected to either of the 14-
pin amphenols and the 6-pin amphenol. Note:
Only one of the 14-pin amphenols can have a
remote control connected at a time. If no remote is
connected to either of the 14-pin amphenols then
the remote will default to the 6-pin amphenol if a
remote is connected to it.
• If a remote control is connected to any of the
amphenols the WELD TERMINAL control will
default to REMOTE. If there are not any remote
control devices attached the WELD TERMINAL
control will default to ON.
V350-PRO
B-4