OPERATION
16
HOT START
Control(12)
PROCESS SELECTOR
Switch(7)
STICK Welding
(SMAW)
LIFT TIG
(GTAW without
High Frequency)
The HOT START control only works if the process selector switch
is in the HF TIG position, the OUTPUT CONTACTOR switch is in
the REMOTE position and a remote control is connected to the
REMOTE 14 receptacle.
The HOT START time is approximately 0.1 seconds and the HOT
START current value is adjusted from 0 to 100 amps over the
determined weld current set at AMPERAGE control at starting.
Rotating the control clockwise increases HOT START current.
Example: Weld current set at AMPERAGE control is 100 amps
and the HOT START is set at 50%. The arc will ignitiate at 150
amps for .1 second and then resume at 100 amps.
The PROCESS SELECTOR switch allows the operator to choose
between the STICK WELDING (SMAW) process, the LIFT TIG
(GTAW) process without high frequency, and the HF TIG
(GTAW) process with high frequency start only.
The unit will provide weld output for the Shielded Metal Arc
Welding (SMAW) process. When the Process Selector switch is in
this position, the ARC CONTROL will function, and the
POSTFLOW TIME control will not function.
The unit will provide weld output for the Gas Tungsten Arc
Welding (GTAW) process. High frequency will not be present.
When the PROCESS SELECTOR switch is in this position, the
POSTFLOW & PREFLOW TIME control will function, and the
ARC CONTROL,HOT START will not function. The unit will
provide a low open circuit voltage and approximately 15-25 amps
(for 1 milli-second) to the tungsten electrode when touched to the
work and lifted away from surface. after the welding arc becomes
established, the output current will be regulated at determined
current level.
5V
15A
Short Circuit Current
A-00040
Figure 3-C
Output Characteristics of Lift TIG
3.1 OPERATOR CONTROLS (continued)
HOT START
STICK
LIFT
TIG
Summary of Contents for 400 GTSW AC/DC
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