SanRex SANARG 300AP, Operator'S Manual

Page: 63 / 98

63
6.04.04 Spot Mode
6.05 Waveform Options
The following references are used within this section.
SP = Straight Polarity
RP = Reverse Polarity
VR-Current = Variable Reverse Polarity Current
6.05.01 VR-Current
Variable of Reverse Polarity Current.
VR-Current is the independent adjustment of the RP Current half cycle of the AC wave to precisely
control the heat input to the work and the electrode.
The SP amperage controls the amount of heat directed to the work, while the RP amperage effects
the arc cleaning action.
VR-Current along with AC Wave Balance dramatically effects the RP cleaning action. By reducing
VR-Current will reduce the heat input to the TIG Torch and reduce electrode geometry degradation
and increases heat input to the work piece for increased travel speeds. By increasing VR-Current
will enhance cleaning when welding on a dirty work piece. Note: Increased VR-Current and
increased Wave Balance will result in an increase to Electrode degradation.
VR-Current is available is all AC modes of operation, the standard AC-Square wave as well as the
AC-SOFT modes (AC-sinusoidal and AC-triangle wave).
Contactor
Hot start
Iw
ON ON
HF
Solenoid
Output current
ON
Pre flow time
Hot cur.
Spot time