Tweco 400 MST Arc Master - Manual (Page 22)

400MST
3
OPERATOR CONTROLS
3 – 3
Table 3-1: Weld Parameter Descriptions for 400MST
3
Weld Process selection for
the 400MST
Table 3-2: Weld Process selection verses Weld Mode
4
Weld Parameter Descrip-
tions
4.1 WELD (V)
This parameter sets the MIG weld arc voltage in
MIG mode.
4.2 INDUCTANCE
This parameter sets the INDUCTANCE when MIG
welding. It controls the dynamic properties of the
arc in dip transfer welding mode. When this param-
eter is set to 0%, ie minimum inductance, the arc
has a fast response with a resulting crisp arc noise
and coarse spatter. When this parameter is set to
100%, ie maximum inductance, the arc has a slow
response with a resulting soft arc and fine spatter.
NOTE
As the INDUCTANCE is increased, the WELD (V)
may need to be adjusted to achieve the desired
weld characteristic.
Parameter Description
This parameter provides a suitable
short circuit current in STICK
welding to improve electrode sticking
and arc stability.
This parameter operates in STICK
weld mode and is used to improve
the start characteristics for stick
electrodes. e.g. low hydrogen
electrodes. It sets the peak start
current on top of the (WELD)
current.
Weld Current (Amperage)- when lit
parameter knob sets the STICK and
TIG WELD current.
Weld Voltage (Volt) - when lit
parameter knob sets the MIG
voltage.
Contactor operation in Stick Mode.
Selects mode of operation: Panel or
Remote.
This parameter, similar to the ARC
CONTROL in STICK mode, allows
for the adjustment of the dynamic
property of the arc. As the
inductance is increased the output
voltage may need to be adjusted to
achieve the desired weld
characteristics.
The SAVE/LOAD buttons are used
to save and retrieve a total number
of 5 programs into the 400MST
memory.
ARC CONTROL
HOT START
DC (A)
DC (V)
Contactor ON/OFF
Operation
PANEL / REMOTE
INDUCTANCE
SAUVEGARDER CHARGER
SAVE LOAD
Weld Mode
Weld
Parameter
STICK MIG
LIFT
TIG
Description
WELD (V) 8 9 8
Weld voltage MIG
Mode.
INDUCT-
ANCE
8 9 8
Inductance control
in MIG Mode.
HOT
START
9 8 8
Start current in
amps is added to
the WELD (A).
WELD (A) 9 8 9
WELD (A) current
for STICK or LIFT
TIG.
ARC
CONTROL
9 8 8
Adjusts percentage
increase in welding
current and is
proportional to arc
length (arc voltage).