Balance/Dig Control - Miller Syncrowave 200 Manual Del Propietário Y Guía

3-5. Balance/DIG Control

BAL
AC TIG
Display
DIG
DC Stick
Display
4
Setting
Typical Starting Point
7
BAL
More Penetration
40% Electrode
10
BAL
2
7
30%
Balance Control Examples
Output Waveforms
43% Electrode
Positive
57% Electrode
Negative
Positive
60% Electrode
Negative
1 Ammeter
2 Voltmeter
3 Encoder Adjustment Control
4 Adjust Control
Select desired process, AC TIG or DC Stick
(see Section 3-4).
Press Adjust push button to turn Balance/
1
DIG function and LED on.
If AC TIG is selected, turn encoder control to
select appropriate balance value (see Sec-
tion 3-12). The selected value is displayed on
the ammeter, and [BAL] is displayed on the
3
voltmeter.
Balance changes the AC squarewave output.
Set control to 7 and adjust as necessary (see
Balance Control Examples). Set at a higher
value to decrease the arc cleaning (or etch-
ing) zone and increase penetration, or set at
a lower value to increase arc cleaning action
of the workpiece.
Application:
Joint configuration, set-up, process vari-
ables, and oxide thickness may affect setting.
!
Do not use AC output in damp areas,
if movement is confined, or if there is
a danger of falling . Use AC output
only if required for the welding
process.
AC weld output is preferred for aluminum due
to the oxide cleaning action it provides. AC
balance controls the amount of cleaning ac-
tion which should be adjusted according to
how heavy or thick the surface oxides are.
Adjust AC balance to the highest setting that
provides approximately 0.10 in (2.5 mm) of
etching zone along the weld toes, while main-
taining a clear, shiny weld puddle.
AC balance should be decreased if a distinct
Arc
etching zone is not visible near the weld toes,
or if the weld puddle appears to have dark,
pepper-like spots on the surface.
If DC Stick is selected, turn encoder control
to select the appropriate amount of Dig (see
Section 3-12). The selected value is dis-
played on the ammeter, and [DIG] is displayed
on the voltmeter.
When set at 0, the DIG current will provide no
additional short-circuit amperage at low arc
voltage. Increasing the DIG percentage in-
creases the short circuit amperage at a low
arc voltage to help start and maintain an arc
and prevent the electrode from sticking to the
workpiece.
Application:
Increase the DIG percentage to reduce or
prevent the electrode from sticking to the
workpiece.
• For cellulose electrodes (6010, 6011), use
a DIG setting of 50 to 80%.
• For low hydrogen electrodes (7018), use a
DIG setting of 20 to 35%.
• For other electrodes, set DIG high enough
to prevent electrode sticking.
• Setting DIG too high could result in burn
thru and unwanted digging due to exces-
sive short circuit current.
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