Hawk,

Speaking of the ALT,.....what is the smallest steel gauge that you have been able to comfortably weld with it in short-arc? If you were to compare it to the MM251's capability on sheetmetal, would the ALT be better still? I'm sure the ALT is great for the thicker stock, but my experience (with transformer migs) shows that having a larger machine slope on the lower end really helps with the sheetmetal gauges. However, on the CV inverters, I'm not sure that slope is really that important anymore since the inverter's arc responds so quickly. I'd be interested in any of your experiences.

I guess what I'm trying to understand is what makes a great short-arc for an inverter based CV machine. For a transformer CV, a higher slope provided a lower short-circuit current--which is what is needed for smaller wires. I'm guessing approx. 230amps short circuit current for a 0.023 dia. wire. The next most important control would be inductance, which allowed you to slow the rate of current increase to the maximum set by the short circuit current. When I look at the relatively flat voltage curves of the inverter, I'm not sure how the short circuit current is limited for the finer wires used for sheetmetal. I know the inverters have the arc control which I think mimics the inductance control of the transformer machines. Any idea of how the short-circuit current is limited if the volt/amp curves are relatively flat? Or is the 'arc control' really adjusting the slope of the machine instead of the 'rate of increase' like a change in inductance would provide?

thanks,

-dseman

Speaking of the ALT,.....what is the smallest steel gauge that you have been able to comfortably weld with it in short-arc? If you were to compare it to the MM251's capability on sheetmetal, would the ALT be better still? I'm sure the ALT is great for the thicker stock, but my experience (with transformer migs) shows that having a larger machine slope on the lower end really helps with the sheetmetal gauges. However, on the CV inverters, I'm not sure that slope is really that important anymore since the inverter's arc responds so quickly. I'd be interested in any of your experiences.

I guess what I'm trying to understand is what makes a great short-arc for an inverter based CV machine. For a transformer CV, a higher slope provided a lower short-circuit current--which is what is needed for smaller wires. I'm guessing approx. 230amps short circuit current for a 0.023 dia. wire. The next most important control would be inductance, which allowed you to slow the rate of current increase to the maximum set by the short circuit current. When I look at the relatively flat voltage curves of the inverter, I'm not sure how the short circuit current is limited for the finer wires used for sheetmetal. I know the inverters have the arc control which I think mimics the inductance control of the transformer machines. Any idea of how the short-circuit current is limited if the volt/amp curves are relatively flat? Or is the 'arc control' really adjusting the slope of the machine instead of the 'rate of increase' like a change in inductance would provide?

thanks,

-dseman

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