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Thread: Arc force question

  1. #1
    Join Date
    Mar 2018
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    Alaska
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    Arc force question

    Ok so a few days ago I made a weld on 10Ē low carbon pipe that was being shot to b.31.3 severe code. I learned on and prefer old school machines and donít have a lot of hours on these newer ones with all the settings on the front as opposed to either one or two big amperage knobs. I was running on a Lincoln ranger 305d and was up all night due to permitting I didnít get to the fill and cap til about 5 am. Kept getting slag pockets in the fill and little pecker holes on the sides of the cap. Never had these problems before except maybe when I was just learning. So the next morning I went and took a better look at the machine to see wtf and the arc force was jacked all the way up. Does it make that big of difference? Do you guys have a preference where you like it for 5p+ and 7018? Do you even mess with it? Any responses are appreciated.

  2. #2
    Join Date
    Jun 2012
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    CT
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    Re: Arc force question

    Arc force increases the amps as the arc length decreases. There was a pretty good post on here somewhere about welding on a machine with a "drooper" volt/amp curve versus some of the newer machines with a more flat volt/amp curve and how welding on them was different, required different settings and techniques, etc. I wonder if that was what you were running into. I think arc force is mostly on the newer type machines. Google "drooper welding machine" and some hits come up from miller and esab explaining it.
    Miller Multimatic 255

  3. #3
    Join Date
    Mar 2018
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    Re: Arc force question

    Thanks. I will. Yes it was definitelydifferent. Had me questioning myself while the inspector was standing over my shoulder harpin on me

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