[amateur]

I already have the printed manual that came with my AC225S. It also covers the AC/DC 225/125. 1/8" rod is right up near the top of the DC range. Thats why I ask the question.

Have you noticed anything loss in stability when you run run AC/DC 225/125 at the top of the DC range?

 

[amateur]

Thanks for taking the time to give me all the information Rick.

What I was trying to get at about accommodating the 230A 50V supply:
For 135AC settings and lower, I measure 77V open circuit. So those settings appear to have a common turns ratio and must be switching in different inductance. Above the 150AC setting, OCV drops off, so we must be selecting different turns ratios. At the 225A setting I measure 54V open circuit. That makes sense to use a lower turns ratio up there, otherwise at full load, it wouldn't stay within the available 11.5KVA.

Now if 125DC shares a tap with 225AC it would have the reduced turns ratio too, even though it wouldn't be required for the 11.5KVA limitation. But I don't know if it uses a common tap or not.


I like the Darth Welder photo.

 

[amateur]

Thanks guys. My stick experience is only 3 different welders that do 42, 50, 65, and 79 VAC open circuit. I found the higher the voltage, the better the result. With the one that has 79VOC, I can usually restrike 7018AC without removing the tip, and I don't have quirky differences between rod brands. You can see why I might be hung-up on OC voltages.
.

 

[amateur]

I found an interesting link...

http://www.millerwelds.com/resources/articles/index.php?page=article108.html

I'm guessing the buzz-box type machines I am likely to use have the simple "drooper" I-V slope, and if OCV determines the I-V slope I think it might be important.

On the other hand, I think the more complicated curves might apply the the kind of equipment you guys might use, and I see OCV does not determine the slope of the I-V curve on those.

I tend to geek-out about stuff like this. Thanks for tolerating it.