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  • #31
    No offence taken at all . I should be ashamed fo taking up everyones time nit-picking. But as I said before, I have tried my mig regulator with the same result, turn off tank, zero within 30seconds. Both regulators hold pressure hooked to the mig with the same bottle.
    Regency 200 w/30A
    Dynasty 200 dx
    Esab 875 plasma
    MM350-P w/30A

    Comment


    • #32
      Bob, IN RESPONSE TO THE ABOVE QUOTE FROM YOUR EARLIER POST.

      I don't usually let off the pedal as the the aluminum gets hot. I just run a heck of a lot faster. You are right. You either have to let up on the amptrol or really pick up the speed after a bit when the base aluminum starts heating up. It has superior thermal conductivity!
      Hawk,

      I wish that I could work faster but I'm just slowly building my speed feed the filler. Hence, I let up on the pedal. I read all your posts and really appreciate all of the info that you and the other great welders put out here. I have really been trying to soak up all your posts on the Dynasty. It is really a great machine and I doubt that I'll outgrow the capabilities of the fantastic piece of equipment.

      Thanks,

      Bob Sigmon
      Bob Sigmon
      ___________________
      Dynasty 200DX w/ Coolmate 3
      Miller Passport
      LMSW-52T Spot Welder
      A/O Setup with Meco Midget
      Miller Big Window Elite
      Quincy QT-5HD

      Comment


      • #33
        I remember before I learned to increase travel speed with mig aluminum I would hear a SPLAT and get a good look at my boots through the big hole.
        Regency 200 w/30A
        Dynasty 200 dx
        Esab 875 plasma
        MM350-P w/30A

        Comment


        • #34
          Bob,

          It is not always as easy as it sounds to inrease your travel speed. Sometimes you have to let up on the pedal or even stop for a cooling session. When I was first trying to get my travel speed up the aluminum would get so hot that I could just push the filler rod as fast as I could and it just kept disappearing. When I finished the beads were wide and nearly flat. Once I stopped and checked the underside of the plate I found it drooping badly. There is always that learning curve and nothing overcomes it like practice.

          Comment


          • #35
            I have definately had a few droops in my early practice. Now I'm focusing on learning when to stop due to heat buildup and of course learning to restart and keep the bead looking nice. I have had some dismal failures but I am starting to see more successes.

            Thanks for all your help (Not just Hawk, but everyone that contributes to the board)

            Bob Sigmon
            Bob Sigmon
            ___________________
            Dynasty 200DX w/ Coolmate 3
            Miller Passport
            LMSW-52T Spot Welder
            A/O Setup with Meco Midget
            Miller Big Window Elite
            Quincy QT-5HD

            Comment


            • #36
              Starting to get the hang of it...I think.
              Regency 200 w/30A
              Dynasty 200 dx
              Esab 875 plasma
              MM350-P w/30A

              Comment


              • #37
                wheels, the bead in the middle left is what you want, its really good.....

                watch out for your CRATERS, clean the **** out of your work piece, s.s. brush that is for aluminum ONLY. accitone,

                keep this in mind, the oxide that forms on aluminum is going to melt at around 3000f* and the base metal melts around 1200f* (hawk ???)

                brian

                Comment


                • #38
                  arcdawg,

                  You are right on! 1200 for the Al and 3000 or more degress for the oxides. If the oxides are not removed by a thorough cleaning then there is a possibility for having oxide inclusions in the weld. There also exists a good probability for poor fusion due to a reduction in the "wetting" action of the weld puddle caused by the surface oxides.

                  This is why AC is so good for Tigging Al. The alternating action tends to help break up the surface oxides. The other reason is the tungsten has a momentary opportunity to cool as the squarewave AC or sine wave for the older TIG units) crosses the midpoint.

                  Comment


                  • #39
                    hawk,

                    thanks alot for the positive feedback, coming from you thats a MAJOR THUMBS UP !!!!!!!!.

                    BRIAN

                    Comment


                    • #40
                      Gaining on it little by little.
                      Regency 200 w/30A
                      Dynasty 200 dx
                      Esab 875 plasma
                      MM350-P w/30A

                      Comment


                      • #41
                        wheels,

                        I can't see the termination very well, but it looks like your stops are coming right along. Good job.

                        Comment


                        • #42
                          Hawk

                          I still have the gas leak I mentioned earlier. I wonder if I should remove the cover with the machine unplugged overnight to prevent a zap and look for an internal leak?

                          Mike
                          Regency 200 w/30A
                          Dynasty 200 dx
                          Esab 875 plasma
                          MM350-P w/30A

                          Comment


                          • #43
                            wheels,

                            Now you all have me thinking: I leave my argon bottle on 24/7 and it never leaks. Saturday I hooked a 50He/50Ar to the the Dynasty using the same flowmeter and hoses. About 4 hours later it appeared to have leaked down. I could not find a leak anywhere. If you have checked all your external connections with a soap solution and cannot find a leak, you can open the machine and check internally. REMEMBER INVERTERS RETAIN INTERNAL POWER FOR A GOOD AMOUNT OF TIME AFTER THEY ARE TURNED OFF! CALL MILLER TECHNICAL:
                            1-800-FOR-AMILLER ASK FOR APPLICATIONS DEALING WITH THE DYNASTY. FIND OUT HOW LONG THE MACHINE NEEDS TO BE OFF AND UNPLUGGED BEFORE OPENING THE COVER.
                            Also have you checked the gas hose fittings from you torch to the front of the machine?

                            Let us know.

                            Comment


                            • #44
                              wheels,

                              I picked up a 300CF bottle of HE/Ar mix and connected the flowmeter connector tightly. I turn the bottle on to check the contents PSI after I just brought it home. It was 1850PSI which is about right for this cylinder size and gas mix 75%He/25%Ar. I turned the tank off and noticed the high pressure side had bled off to 1700PSI. I tightened the flowmeter to tank connection and turned the bottle back on and off again. It rose back to 1850PSI. This time it slowly bled off to 1800. I cranked the flowmeter to tank connector tighter and repeated the procedure. All this time the Dynasty is off. The flowmeter is hooked to the tank and the other end of the gas line is hooked to the back side of the Dynasty. I kept tightening the flowmeter to the tank connection everytime the slight drop in PSI was detected. Now there is no more leak. Before I kept tightening this connection I doubled checked the hose and flowmeter connection and the hose to the Dynasty connection.

                              The point I am trying to make is even though the tank to regulator or flowmeter may seem tight ; It may have to be tightened more due to possible wear on the tank threads. Remember you are not the only one that has used this tank. It may take a 12 or 15" crescent wrench to get the job done. A soapy water solution may not detect a very minor leak such as your regulator or flowmeter gauge may show as a 50 PSI pressure drop over a number of hours.

                              I think I would go this route before resorting to opening the Dynasty.

                              Comment


                              • #45
                                SAFETY FIRST

                                ANOTHER THOUGHT. IF THE DYNASTY IS OPEN AND THE POWER IS OFF, THEN THE GAS CONTACTOR IS OFF. HOW WOULD YOU LOCATE THE LEAK? I WOULD NOT HAVE THE POWER ON AND THE COVER OFF ANY IGBT MACHINE INCLUDING THE DYNASTY. You are talking high voltage and high current!!!

                                You may be able to check for a leak up to the gas contactor. After the gas enters the contactor you will not be able to trace its path with the power off. DO NOT TURN ON THE POWER WITH THIS UNIT OPENED AND OUT OF ITS CASE!!!

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