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TB 275/ 302 DC unit and Tig welding

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  • K&D welding
    started a topic TB 275/ 302 DC unit and Tig welding

    TB 275/ 302 DC unit and Tig welding

    Hello all
    So I have new question I have a TB 302 DC only unit, and today I tried to scratch tig and it wouldn't work it just melted the tungsten in an instant. What I have done with my buz box is just attached my gas block and tig torch to the stinger and the ground to the work piece. Yes there is no way back off on the heat but I have done this for years. I was trying to do the same with the TB but I think I am off some where, any advice. I would like to do AL too,, so I may just buy a dynasty and plug it in to the 220 side and just be done with it. what do you guys think
    thanks

  • H80N
    replied
    Originally posted by K&D welding View Post
    cruz, mmw and HH,
    Yes I see the error, thanks again, I was following the Pic on the machine (ie stick/ TIG) not what I I know. Oh the joys of night shift work and being tired all the time
    thanks for setting me straight
    D
    Did that resolve your problem..??

    Do Tell..??... can you TIG with it now..??...

    Leave a comment:


  • K&D welding
    replied
    cruz, mmw and HH,
    Yes I see the error, thanks again, I was following the Pic on the machine (ie stick/ TIG) not what I I know. Oh the joys of night shift work and being tired all the time
    thanks for setting me straight
    D

    Leave a comment:


  • MMW
    replied
    This is how it should be hooked up, tig torch to negative & ground/work lead to +. It sounds like you are trying to tig in dc+ instead of dc-.

    Leave a comment:


  • K&D welding
    replied
    I was following what the machine had said where to put the leads as my unit doesn't have a selector elctro + or - (unit ser# lh300258q stock # 907214). I didnt switch my lead cause I just assumed that there was something wrong with the lift-arc function. in hindsight an extra 5 minutes I may have had my answer.

    Leave a comment:


  • cruizer
    replied
    Last time I looked there was lift arc on the 302, as yes kindly switch the cables like H80N said, with the Torch to the neg on your machine with pos going to the work clamp......You have tigged before haven't you???? Going to have to spool Aluminum

    Leave a comment:


  • H80N
    replied
    Originally posted by K&D welding View Post
    yes it balled up the tungsten and than its gone instantly . Its a DC only machine so I can't switch from electro + or -. unless I try switching the actual leads.
    Electrode Negative----puts the heat into your work..

    Electrode Positive---- will put the heat into the Tungsten Electrode..(POOF..!!)

    so check and if you need to physically switch the leads do so..

    Which model Trailblazer??.....Welder serial#...??
    Last edited by H80N; 05-20-2014, 07:41 PM.

    Leave a comment:


  • K&D welding
    replied
    yes it balled up the tungsten and than its gone instantly . Its a DC only machine so I can't switch from electro + or -. unless I try switching the actual leads.

    Leave a comment:


  • H80N
    replied
    Melting back the Tungsten..??...Proper size..?? ...&....You are running DC Electrode Negative right..??..

    If you can... by all means get the Dynasty...

    You will not be sorry....
    Last edited by H80N; 05-20-2014, 05:37 PM.

    Leave a comment:

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