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Most of my questions stem from what is discussed in this video.Travis is using an sa 200 as an example, but would this apply to all welder generators? the lowly Miller Bobcat has "gears", but only 3, as well as a fine adjust. In the manual it says the fine adjust is to change the amperage further. For example 2nd gear (70-150) and fine adjust of 5 is suppose to represent 110 amps. Stick welding machines are constant current, which is measure in amps. Since we set amps, then aren't we setting the current? I know voltage is part of the equation since it varies to keep the current constant despite slight changes in arc length, but how? What is the mathematical equation that would be used to show how voltage relates to current? Where does OCV come into play? How can the fine adjust set the voltage, if it varies anyways?I'm a bit stumped on the deeper explanation of the electrical workings of an arc, but I'd like to learn more so I can know better how to set a machine for exactly what I'm trying to do.
Reply:perhaps this one? I = V / Rwhere I is current in amperes, v is voltage and r is resistance. I am guessing resistance would be the electrode and the leads, or is there some type of resistor to modulate the relationship between amps and volts? Or am I way off? |
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发表于 2021-8-31 22:18:20