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What is a common amount of "SLOPE" in a transformer based mig welder

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发表于 2022-7-10 15:51:31 | 显示全部楼层 |阅读模式
Hello AllNot sure if this belongs in the mig,stick forum or electrical forum. It's more of an equipment technical question than an actual welding question.Just wanted to ask what is a common amount of SLOPE in a transformer based mig power supply . I'm not sure I fully understand the concept of "Slope" in a mig welder but in really simple terms, from what I have found on the web, it just sounds like it's the drop in voltage from the voltage at full open circuit  down to actual working or welding voltage.  So just as  an example my converted Miller CP200 with the voltage control cranked all the way down starts out with an open circuit voltage  of 34vdc then drops down to a working voltage of 15vdc (that's a pretty big drop) @about a 125 amps welding on 16ga mild steel. Fully cranked it goes up over 51vdc OCV. Does this sound about right .? For some who might have a better understanding of all this will hopefully  Chime in ??
Reply:Steel uses a flatter slope than stainless. Don't know what year your CP-200 is but here's a manual that shows the volt/amp curves for a CP-200. Miller used to make a 250 amp machine with adjustable slope. Found it, it's a CP-250TS. I had a Trailblazer 55D with 3 slope positions that show the different slopes. Some machines also have an inductance  control. Linde used this on a lot  of their machines. Length's of cables, connections, grounding, etc. can all affect slope too.https://www.millerwelds.com/files/ow.../O235R_MIL.pdfhttps://www.millerwelds.com/files/ow.../O249N_MIL.pdfhttps://www.millerwelds.com/files/ow.../O456Q_MIL.pdfLast edited by Welder Dave; 54 Minutes Ago at 02:56 AM.
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