Lincoln Electric RED-D-ARC FX450 Operator's Manual page 20

B-7
GTAW
This weld mode is a constant current (CC) mode featuring con-
tinuous control from 10 – 500 amps. It is intended for the GTAW
TIG welding processes.
Hot Start - The Hot Start control regulates the starting current
at arc initiation. Hot Start can be set to "Off" and no additional
current is added at arc start. When set to the "On" position,
additional current (relative to the preset current) at arc initiation.
Arc Control – This control is not used in the GTAW mode.
Weld Terminals On/Remote
• When set to the "ON" position, the weld terminals are at OCV
(open circuit voltage) and ready to weld.
• When set to the "REMOTE" position, output is enabled
through a remote trigger.
Voltage Display Meter – This display will display three dashed
lines when the machine is in the idle state. This indicates that
voltage is not settable in this weld mode. While output is
enabled, the actual welding voltage is displayed. After welding,
the meter holds the actual voltage value for 5 seconds. Output
adjustment while in the "hold" period results in the "prior to
operation" characteristics. The displays blink indicating that the
machine is in the "hold" period.
Amperage Display Meter – This display will display the pre-set
welding current when the machine is in the idle state. While
output is enabled, the actual weld amperage is displayed. After
welding, the meter holds the actual amperage value for 5 sec-
onds. Output adjustment while in the "hold" period results in the
"prior to operation" characteristics. The displays blink indicating
that the machine is in the "hold" period.
Output Control Local/Remote – When the control is set to
local (no remote potentiometer/control plugged into the 6-pin or
14-pin connectors), the output is controlled through the Output
Control Dial on the front of the FX450. Set this switch to
"REMOTE" when an external potentiometer/control is connect-
ed.
• When a remote potentiometer is connected, the output control
on the FX450 and the remote act as a master/slave configura-
tion. Use the control dial on the FX450 to pre-set the maxi-
mum welding current. The remote will control output from
minimum to the pre-set maximum.
Output Control Dial
• When the Local/Remote is set to Local, this dial sets the
welding amperage.
• When the Local/Remote is set to Remote, this dial sets the
maximum welding amperage.
The remote potentiometer controls the amperage from minimum
to this pre-set maximum.
OPERATION
CV-GAS
This weld mode is a constant voltage (CV) mode featuring con-
tinuous control from 10 to 45 volts.
It is intended for the GMAW, FCAW-GS, MCAW welding
processes and arc gouging.
Hot Start – Toggle to "ON" position to provide more energy
during the start of a weld.
Arc Control – The Arc Control regulates pinch effect
(Inductance). At the minimum 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 maxi-
mum setting (+10), maximizes pinch effect and results in a crisp
arc. High pinch settings are preferable for welding FCAW-GS
and GMAW with CO
Weld Terminals On/Remote
• When set to the "ON" position, the weld terminals are at OCV
(open circuit voltage) and ready to weld. This selection is
used for across the arc wire feeders.
• When set to the "REMOTE" position, output is enabled
through a remote trigger.
Amperage Display Meter – This display will display three
dashed lines when the machine is in the idle state. This indi-
cates that amperage is not settable in this weld mode. While
output is enabled, the actual welding amperage is displayed.
After welding, the meter holds the actual amperage value for 5
seconds. Output adjustment while in the "hold" period results in
the "prior to operation" characteristics. The displays blink indi-
cating that the machine is in the "hold" period.
Voltage Display Meter – This display will display the pre-set
welding voltage when the machine is in the idle state. While out-
put is enabled, the actual weld amperage is displayed. After
welding, the meter holds the actual voltage value for 5 seconds.
Output adjustment while in the "hold" period results in the "prior
to operation" characteristics. The displays blink indicating that
the machine is in the "hold" period.
Output Control Local/Remote – When the control is set to
local (no remote potentiometer/control plugged into the 6-pin or
14-pin connectors), the output is controlled through the Output
Control Dial on the front of the FX450. Set this switch to
"REMOTE" when an external potentiometer/control is connect-
ed.
Output Control Dial
• When the Local/Remote is set to Local, this dial sets the
welding voltage.
• When the Local/Remote is set to Remote, this dial is disabled.
FX450 (RED-D-ARC)
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