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Used Dynastys; How old is TOO OLD?

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  • Used Dynastys; How old is TOO OLD?

    There is a used dynasty 200 dx for sale in my area. Asking $2000.

    The serial # determines it to be an 04.
    Miller Tech support says it has a clean history.
    The owner claims it has low hours with a moonlight operation.

    How long do these machines typically last?
    What goes out?
    Are there any things that Miller changed over the years?


    Blue lightning came out in ~08. I've heard its nice but nothing to write home about.

    I have experience with a new D350 and really like the ability to play with wave frequency on aluminum.

    Thanks for the help!

  • #2
    I would say that machine is on borrowed time. the reason I say that is because it has low hours. I've been told these inverter machines need to be used or one day you'll flip the switch and POP, HISS.....$$$$$$

    get a diversion, I'm so freakin happy with mine

    Comment


    • #3
      I didnt consider the Diversion cause it doesent cant stick weld.
      I suppose I could fall back on my generator/welder for stick. But its so Noisy.
      Has anyone retrofitted it with Dinse Connectors?
      Last edited by coronan; 05-10-2013, 12:04 PM.

      Comment


      • #4
        Originally posted by benny365 View Post
        I would say that machine is on borrowed time. the reason I say that is because it has low hours. I've been told these inverter machines need to be used or one day you'll flip the switch and POP, HISS.....$$$$$$

        get a diversion, I'm so freakin happy with mine
        We have the FIRST generator Miller 304's. Used about two to three days a week. NO ISSUES.
        Also have a bunch of CST 280,the Maxstar 200's , and the 150's. Never had any issues. The 150's are special use machines and don't have too many hours. NO POP YET. I never heard of the ''POP''. Maybe CRUIZER will commeton the ''POP"
        If you need a light weight and portable machine a inverter is the way to go.
        If you need a machine for in the shop the Miller 200 syncro would work.

        Comment


        • #5
          Do 200dx's have arc Time and arc start counters? Could be useful info

          Comment


          • #6
            What i am reading from the forum is that Dynastys have A board and or capacitor that goes bad and costs about $1000 to fix.

            But there are only 2 cases on this forum.

            Comment


            • #7
              Used Dynastys; How old is TOO OLD?

              Never heard that if don't use dynasty they go pop & quit. Bought used 200 for Tig & love it, Awesome welder. Also it runs a stick very smooth. In fact I had to do some light welding on a dozer last week, was using a bobcat and if I'd of had my dynasty would of plugged it into bobcat & run dynasty. Like the dig for light rods & out of position welding. Another great feature is u can run off small generator if need to. I've run 3/32 rods with 3500 watt.

              Comment


              • #8
                Originally posted by Cgotto6 View Post
                Do 200dx's have arc Time and arc start counters? Could be useful info
                Yes (may depend on vintage.) From the manual of a fairly recent version:

                3 Arc Timer Display
                Upon power up as described above, the meter S LED will turn on, and arc time will
                be displayed for 5 seconds as [000 000] to [999 999]. The first four numbers indicate
                hours, and the last two numbers indicate minutes. Arc time shown in example is read
                as 1,234 hours and 56 minutes. Maximum arc time is 9,999 hours and 59 minutes.

                4 Arc Counter
                After 5 seconds, the meter A LED turns on, and the arc counter will be displayed for the
                next 5 seconds as [000 000 ] to [999 999 ]. The maximum arc cycle count is 999 999.

                Comment


                • #9
                  i've been told the inverters will last about 8-10 years then there deader then a door nail and you buy another one, this is why i bought the syncrowave they last longer. Don't get me wrong the dynasty welds great but I don't want to replace it after 8-10 years though.

                  Comment


                  • #10
                    ????

                    Originally posted by chris2626 View Post
                    i've been told the inverters will last about 8-10 years then there deader then a door nail and you buy another one, this is why i bought the syncrowave they last longer. Don't get me wrong the dynasty welds great but I don't want to replace it after 8-10 years though.
                    I also keep hearing this, however, I have yet to hear a reasonable explaination for the alleged phenomena. Yes electrolytic caps will dry out and fail causing possible catastrophic board failures but almost every modern welder has electrolytics in it somewhere. I don't see why an inverter, particularly a fairly modern one(when one should be reasonably able to assume that the manufacturer has worked out the bugs of operating a machine in the welding environment) should fail like clockwork in 8-10 years and at the same time assume that a transformer machine will not likely suffer the same fate. I think that proper storage and regular exercise are probably a good idea but I don't think that regular must necessarily mean daily. Granted to know that a machine is going to fail in 10 years, it has to be 10 years old which means that the technology is also 10 years old and woud not benefit from the latest product improvements but still I want someone to enlighten me with the facts if they can.--Meltedmetal

                    P.S.- I am aware that inverter technology has evolved from scr's to igbt's but even at least some scr technology is still functioning reliably long after 10 years.-Mm

                    Comment


                    • #11
                      Reliable electronics

                      I don't see why electronics of any kind should just fail in 8 to 10 years. If you looked around your house, you would probably find some electronics which has been there a long time. My favorite AM-FM radio is roughly 30 years old.

                      The bathtub curve is the usual way of looking at electronics failures, which suggests that many failures are in the first few months, then it drops off to a low flat rate, then gradually starts to increase later. The graph below suggests that failures increase around 25 years. Moreover, welders are generally not powered on, which should extend their life, versus something plugged in 24/7.

                      http://doi.ieeecomputersociety.org/c...res/d20881.gif

                      I have a Thermal Arc inverter welder which is probably 20 years old, it works. I was visiting a shop last night with a PowCon AC/DC, still in use, I would guess 20 years.

                      Richard
                      Last edited by raferguson; 05-11-2013, 09:49 AM.

                      Comment


                      • #12
                        I understand the bath tubb curve but, I'm not sure Inverter machines have been around long enough for us to see the other end of the curve.

                        I had a Lincoln Invertec V160T performed like it was new for 10 years of light use. I wouldn't have sold it except I need a machine that can do AC.

                        Transformer Machines last forever because they have such simple components.

                        Comment


                        • #13
                          I always hear of people "hearing from somebody" about the longevity of inverters but no actual real world instances where a properly, not over used inverter took a dump pre maturely. Seems like one of those Internet rumors to me. Granted I have no real world experience, but I do know three friends who have had their inverter tigs for over ten years with no hiccups.

                          Comment


                          • #14
                            Short of welding with batteries or DC generators welding equipment that welds DC has to use some kind of rectification. In modern eqipment that is all done with solid state state devices. There is no reason to suppose that properly designed, installed and used diodes are any more resilient than scr's or igbt's again properly designed, installed and used. I think some of the stories may come from early designs or misuse. Often made all the worse because it can still look perfect after it is burned out and costs a lot to repair. It doesn't happen often without abuse, or accidental damage but have you priced a replacement transformer for your welder?---Meltedmetal


                            I will admit I still don't really trust modern solid state devices but you can probably blame that more on how many birthdays I've celebrated than on real world experience with device failure.--Mm

                            Comment


                            • #15
                              How much did a 200DX cost in '04? That's another way of looking at it.

                              Comment

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