Announcement

Collapse
No announcement yet.

Gas Lens and Contamination

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Gas Lens and Contamination

    I purchased a set of standard gas lens' for my 20 series tig torch, when I use it there is really bad contamination in the weld puddle. I can tig aluminum well in general but when I put in the gas lens the puddle looks contaminated.

    I can switch right back to the standard collet body and the weld puddle is clean and clear.

    My question is: is the standard nozzle insulator acceptable?

    What kind of flow rate is used on say 3/32 pure for alum.

    Also what kind of tungsten stick-out is acceptable?

    Thanks Ben

    Syncro 200 15 cfm argon 4043 filler
    MM 211 W/ Spoolgun
    Diversion 180
    Spectrum 375 X-TREME
    Portable Victor O/A
    Palmgren Bench Drill Press
    14" Evolution Dry Saw
    IR 60 Gal. 3 HP Compressor
    Speedglas 9100x
    My Brain

  • #2
    On my WP17 you cannot use the standard nozzle insulator with a gas lens setup, you have to swap it out with a diff one...
    sigpic

    Comment


    • #3
      Likewise, on my 18 series torch as well as my CK 210 which takes identical parts, an insulator compatible with the gas lens is required. Suggest you take your torch with you to your LWS for correct fitting.
      Miller XMT-350 CC/CV
      Miller S-22A wirefeeder
      Bernard 400A "Q" gun
      Miller 30-A Spoolmatic w/WC-24
      CK 210 & WP-18 GTAW torches
      Hypertherm Powermax 30
      O/A Rig, Enco 4x6 bandsaw, etc.

      Comment


      • #4
        Originally posted by benny365 View Post
        I purchased a set of standard gas lens' for my 20 series tig torch, when I use it there is really bad contamination in the weld puddle. I can tig aluminum well in general but when I put in the gas lens the puddle looks contaminated.

        I can switch right back to the standard collet body and the weld puddle is clean and clear.

        My question is: is the standard nozzle insulator acceptable?

        What kind of flow rate is used on say 3/32 pure for alum.

        Also what kind of tungsten stick-out is acceptable?

        Thanks Ben

        Syncro 200 15 cfm argon 4043 filler
        If you are using the SMALL gas lens on a 20 size torch the insulator is the same one you use for standard nozzle. But, if you have the LARGE gas lens you need a different insulator... model number 54N63-20.

        You didn't say what nozzle size you have (#4,#5,#6 ...) This has alot to do with gas coverage.
        Dynasty 200 DX runner
        Sync 350 LX
        XMT 300 w/D74 and roughnecks
        Hobart 135
        ESAB PowerCut 875 plasma

        Comment


        • #5
          I was using the 3/32 #7 small gas lens. It seems like theres a good seal between the nozzle and the insulator.
          MM 211 W/ Spoolgun
          Diversion 180
          Spectrum 375 X-TREME
          Portable Victor O/A
          Palmgren Bench Drill Press
          14" Evolution Dry Saw
          IR 60 Gal. 3 HP Compressor
          Speedglas 9100x
          My Brain

          Comment


          • #6
            Hmmm...if you are switching right over with only gas lens change that is odd...try more gas.

            Oh, on another point you said you had a Syncro 200. You shouldn't need a pure tungsten with that machine. I use 2% ceriated ground almost to a point on a 350 syncro. Bump your balance to about 8.5 and as you start running a bead a small ball will form on the flat left at end of tungsten, and you will have a more focused arc. Not that this will stop the contamination issue... just something to try.
            Dynasty 200 DX runner
            Sync 350 LX
            XMT 300 w/D74 and roughnecks
            Hobart 135
            ESAB PowerCut 875 plasma

            Comment


            • #7
              So I was playing with the 3/32 gas lens again tonight on steel. 3/32 thoriated and I am not having very good luck. I can go from the reg collet body @ 13 cfh and have a nice clean arc, then go to the gas lens and and it spits and sputters from 13 to 30 cfh.

              The lens was brand new from htp on ebay.

              What cfh am I suppose to be running?

              I must be doing something wrong.

              Any more suggestions?
              MM 211 W/ Spoolgun
              Diversion 180
              Spectrum 375 X-TREME
              Portable Victor O/A
              Palmgren Bench Drill Press
              14" Evolution Dry Saw
              IR 60 Gal. 3 HP Compressor
              Speedglas 9100x
              My Brain

              Comment


              • #8
                i just got gas lenses from HTP for my #26 torch.
                i also got an other insulator for between the torch and the cup to use instead of the origonal.

                I just swapped them and left the gas the same and things were fine. then i turned the gas down and it was still fine.

                when you put the lens on is the o ring on the back cap "inside" the torch body?

                G

                Comment


                • #9
                  I think so, The back cap seems to be in the same place with either collet.
                  MM 211 W/ Spoolgun
                  Diversion 180
                  Spectrum 375 X-TREME
                  Portable Victor O/A
                  Palmgren Bench Drill Press
                  14" Evolution Dry Saw
                  IR 60 Gal. 3 HP Compressor
                  Speedglas 9100x
                  My Brain

                  Comment


                  • #10
                    you should be able to have more stickout with a lense and better coverage with the same CFH.
                    You got to have a leak somewhere.

                    your lense isnt blocked is it? even partly.
                    G

                    Comment


                    • #11
                      I am new to tig welding, decided to try the gas lens on my WP-17 and purchased the new lense, insulator and cup, when I installed the insulator and the cup, it didn't look right, I then put the standard insulator against the torch body and then the "GL" insulator and then installed the cup and it all fit up tight??? could this possibly be right (for you and me) even with your WP-20 torch??

                      Tim
                      sigpicRetired Elevator Consrtructor Local 19 IUEC
                      AK bush pilot (no longer in AK) too old and no longer bold)
                      Chaplain CMA chapter 26
                      Dynasty200dx (new and loving it)
                      MM-252 (NEW AND LEARNING IT)
                      Hypertherm PM-45
                      Miller 140 mig 110v
                      Vtwin builder

                      Comment

                      Working...
                      X