Thermal Arc ARCMASTER 300 AC/DC, Service Manual

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300ACDC
4
OPERATOR CONTROLS
4 – 4
Table 4-3: Weld Parameter Descriptions for ARC MASTER 300ACDC
WAVE BALANCE
This parameter is used for aluminium AC TIG mode and is used to set the penetration to cleaning
action ratio for the AC weld current. Generally WAVE BALANCE is set to 50% for AC STICK
welding. The WAVE BALANCE control changes the ratio of penetration to cleaning action of the
AC TIG welding arc. Maximum weld penetration is achieved when the WAVE BALANCE control is
set to 10%. Maximum cleaning of heavily oxidised aluminum or magnesium alloys is achieved
when the WAVE BALANCE control is set to 65%.
DOWN SLOPE
This parameter operates in TIG modes only and is used to set the time for the weld current to ramp
down, after the torch trigger switch has been pressed, to CRATER CUR. This control is used to
eliminate the crater that can form at the completion of a weld.
CRATER CUR.
This parameter operates in SLOPE or REPEAT (4T) TIG modes only and is used to set the finish
current for TIG. The CRATER Current remains on until the torch trigger switch is released after it
has been depressed.
POST-FLOW
This parameter operates in TIG modes only and is used to adjust the post gas flow time once the
arc has extinguished. This control is used to dramatically reduce oxidation of the tungsten
electrode.
The SAVE/LOAD buttons are used to save and retrieve a total number of 5 programs into the
300ACDC memory.
Parameter Description
WAVE BALANCE=10%
Maximum Penetration and
reduced cleaning
WAVE BALANCE=50%
Balanced with 50%
penetration and 50%
cleaning
WAVE BALANCE=65%
Maximum Cleaning and
reduced penetration
50%
50%
(+)
(-)
10%
90%
(+)
(-)
65%
35%
(+)
(-)
t2
SAUVEGARDER CHARGER
SAVE LOAD