single sided spot welder help needed

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  1. yalpngulp

    yalpngulp Well-Known Member

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    I bought a porta spot single sided welder that is older than me, it looks just like the one in the picture . First time using it, I welded 2 scrap pieces of 18ga sheet together, i pryed and twisted the metal and it didn't want to come apart afterwards so it seemed to work pretty good . Since then, I cleaned up the probes a little with a wire brush a bit because they were corroded looking. now I can't get it to stick, I've tried different temperature and timing settings. I'm not sure what I did different the first time but I can't seem to reproduce it. The very first time, I let off the trigger early and didn't let the timer shut it off, so I'm wondering if maybe I have the timer too high now. Is it possible that welding it too long makes it unstick? I'm getting great penetration and a nice glow on the metal but it just doesn't want to stick. I'm open to suggestions.

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  2. Lets Roll

    Lets Roll Well-Known Member

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    Are the pieces your welding tight up against eachother and clean? If they are its possible there is a problem with the unit its self. I would start at the tips and work your way back checking and cleaning. Its possible you found the problem already and its in the leads.
     
  3. Mike67

    Mike67 Well-Known Member

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    Gaps, grounds and contaminants are the the enemy! Make sure none are present!, except a good ground...:)
     
  4. flypaper

    flypaper FBBO Gold Member FBBO Gold Member

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    That is exactly why I will never use one.
    You never know when the penetration will go away on you
    while using it and for that reason
    I do not trust it..
     
    Last edited: Jul 28, 2017
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