Tweco 300 DC Arcmaster - Manual (Page 30)

ARCMASTER 300 ACDC
4-4 February 22, 2006
4.03 Weld Parameter Descriptions for ArcMaster 300 ACDC
Figure 4-3: ArcMaster 300 ACDC Front Panel
Parameter Description
PRE-FLOW
This parameter operates in all weld modes except Lift TIG mode and is
used to heat up the weld zone in TIG modes or improve the start
characteristics for stick electrodes. e.g. low hydrogen electrodes. It sets
the peak start current on top of the
BASE (WELD) current.
e.g. HOT START current = 130 amps when BASE (WELD) = 100 amps &
HOT START = 30 amps
INITIAL CUR. This parameter operates in SLOPE or REPEAT (4T) TIG modes only and
is used to set the start current for TIG. The Start Current remains on until
the torch trigger switch is released after it has been depressed.
UP SLOPE This parameter operates in TIG modes only and is used to set the time
for the weld current to ramp up, after the torch trigger switch has been
pressed then released, from INITIAL CUR to PEAK or BASE current
This parameter operates in TIG modes only and is used to provide gas
to the weld zone prior to striking the arc, once the torch trigger switch
has been pressed. This control is used to dramatically reduce weld
porosity at the start of a weld.
HOT START
Art # A-07654
Table 4-3: ArcMaster 300 ACDC Front Panel Parameter Description