5 OPERATION
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5.4
Shielding gas
The choice of suitable shielding gas depends on the material. Typically, mild steel is welded with mixed gas (Ar + CO2) or
100% carbon dioxide (CO2). Stainless steel can be welded with mixed gas (Ar + CO2) or trimix (He + Ar + CO2). Aluminum
and silicon bronze use pure argon gas (Ar). In the sMIG mode (see "sMIG mode" section in the "CONTROL PANEL" chapter),
the optimal welding arc with the gas used will be automatically set.
5.5
Volt-ampere curves
The curves below show the maximum voltage and amperage output capabilities of the power source for three common
welding process settings. Other settings result in curves that fall between these curves.
A= Welding current (AMPS), V = Output voltage
5.5.1
SMAW (Stick) 120 V
Figure 4. SMAW (Stick) 120 V Duty cycle
5.5.2
SMAW (Stick) 230 V
Figure 5. SMAW (Stick) 230 V Duty cycle