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  • Airforce 12ci

    i just bought a 12ci and tried using it today, i installed the guide on the gun and just about 4 seconds into the cut the spark goes out. i restart the spark and the same thing keeps happening. i could not cut a piece of 1/8 X 4" steel with one cut, i had to keep starting as the spark stopped. no trouble lights came on, the compressor was running, had a good clean ground and the ground clamp was about 4" from my cut. i also changed the consumables but no change. This unit is brand new out of the box.
    What was i doing wrong?

  • #2
    Originally posted by jjgonzo View Post
    i just bought a 12ci and tried using it today, i installed the guide on the gun and just about 4 seconds into the cut the spark goes out. i restart the spark and the same thing keeps happening. i could not cut a piece of 1/8 X 4" steel with one cut, i had to keep starting as the spark stopped. no trouble lights came on, the compressor was running, had a good clean ground and the ground clamp was about 4" from my cut. i also changed the consumables but no change. This unit is brand new out of the box.
    What was i doing wrong?
    You did not phone Hobart, after running through the trouble-shooting section of the manual.

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    • #3
      I'm not sure why or how, but lots of good advice is being handed out tonight.

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      • #4
        The cutting arc will do this as a result of a poor ground clamp connection or weak input power. It is going through the pilot arc sequence then shutting off.

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        • #5
          i did call but it was too late, they close at 5 pm eastern and did not have a chance to call today. i used a grinder to clean the metal on both sides before i started and tried different outlets.

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          • #6
            Originally posted by jjgonzo View Post
            i did call but it was too late, they close at 5 pm eastern and did not have a chance to call today. i used a grinder to clean the metal on both sides before i started and tried different outlets.
            And? Did you check Keith's advice by fully ensuring both ground and input power?

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            • #7
              I am having the exact same problem with my plasma cutter. I have tried the things mentioned but I'm going to give it another shot. I did read on a couple of forums that mentioned it could be caused by getting moisture into the compressor from a very humid climate such as where I live.

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              • #8
                Originally posted by Josh7099 View Post
                I am having the exact same problem with my plasma cutter. I have tried the things mentioned but I'm going to give it another shot. I did read on a couple of forums that mentioned it could be caused by getting moisture into the compressor from a very humid climate such as where I live.
                Update to my post - I found an extremely dirty ground clamp bolt/wire connection and once I cleaned it off and put everything back together it worked great.

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                • #9
                  Glad to hear you got it going.

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                  • #10
                    Originally posted by Hobart Expert Keith View Post
                    Glad to hear you got it going.
                    Thanks again for your help Keith!

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                    • #11
                      a little late to the show but the second part of Kieth's comment may have got lost.

                      "The cutting arc will do this as a result of a poor ground clamp connection or weak input power."

                      These little guys need ALL the help they can get with input power. If the ground clamp connection doesnt fix the problem check the unit on known 20amp individual circuit.

                      Another thing to keep an eye on when experiencing poor performance is the consumables (Torch Tip, Electrode, And Shield Cup)


                      due to the fact that they have an onboard compressor and no real way to keep the air dry, they eat electrodes rather quickly.

                      Ed Conley
                      Screaming Broccoli, Inc
                      http://www.screamingbroccoli.net/
                      MM252
                      MM211
                      Miller Passport Plus, Spoolmate 100
                      TA185
                      SO 2020 Bender
                      Miller 125c Plasma
                      "Hold my beer while I try this!"

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