I have belonged here 7-8 years and don't post often but recently have been doing some additional welding and when coming here I recently noticed the two threads with Dynasty 300 issues and that seemed a little peculiar. I have had mine for years and it was in the service center 1 time back when new and I can not remember for sure what the issue was, maybe a HF start issue. I am just curious since it happens to be the machine I have and use, I love welding with it either way. I am a hobby welder so I tig almost everything even if the mig was more suited for the job as I don't need mig practice but will never get enough tig time to be the welder I want to be.
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Does the Dynasty 300 DX have any particular reliability problems ??
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Does the Dynasty 300 DX have any particular reliability problems ??
Miller Dynasty 300 DX TR, 2007
Miller MM 251 w/30A spool gun, 2005
Lincoln SP-100, 1990
Hypertherm PM 45, 2014
Scotchman 5014CM Ironworker 2005
Grizzly 12x36 lathe 2010
Wilton Belt sander and Cutoff Bandsaw 2006Tags: None
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Originally posted by Doug Doty View PostI have belonged here 7-8 years and don't post often but recently have been doing some additional welding and when coming here I recently noticed the two threads with Dynasty 300 issues and that seemed a little peculiar. I have had mine for years and it was in the service center 1 time back when new and I can not remember for sure what the issue was, maybe a HF start issue. I am just curious since it happens to be the machine I have and use, I love welding with it either way. I am a hobby welder so I tig almost everything even if the mig was more suited for the job as I don't need mig practice but will never get enough tig time to be the welder I want to be.
Well I was going to wait and let the others chime in but no response yet. From reading the past posts on the forum I've gathered that the Dynasty 300dx had a short production run. Which now translates to very few repair parts if you have a break down. And, because of this reason, if you experience problems sometimes your machine will be better served as a boat anchor. "Boat Anchor" as a quote from a well respected Tech/Poster. hope that helps and hope my info is correct.sigpic
Dynasty 200 DX
Millermatic 350P
30A Spoolgun
Lincoln Pro Mig 140
Hypertherm Powermax 30
14" Rage Evolution dry saw
40 ton press brake
Evenheat Heat treat oven
1x42 / 4x48 belt grinder
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Boat anchor, lol, sounds like my saying but yet while the 300 is based on the xmt 304,CC its got a bunch of misc parts thrown into it. though 90 % of the time its a front board issue. The switch membranes just didn't last. Faulty programming certainly didn't help matters. No error codes and its ALWAYS the front board. The reg XMT is the same way though just not as much.
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Have you ever asked a question and then wished you had not, after hearing the answers. !!
It really hurt my feelings having that original issue when it was new and under under warranty, after paying that much for it. I think I give $6500 for it as a tig runner package and now it takes $9500 to buy the 350 to replace it, hard to want to give Miller my money after reading the responses. Mine is super low time. I built a chrome moly tube chassis drag car and a small custom aluminum pontoon boat and other than that it is just occasional use. Found some paperwork saying I got it in 2007, was thinking it was a couple years older but I used the 200 dx for a while and then sold it here and traded up. I was just thinking about upgrading to the next step in the line and features but with this reputation I doubt my resale value will make it very tempting. It runs good for now so maybe it will last till they put out their next turd and I can buy it.Dare I ask opinions about my MM 251
Miller Dynasty 300 DX TR, 2007
Miller MM 251 w/30A spool gun, 2005
Lincoln SP-100, 1990
Hypertherm PM 45, 2014
Scotchman 5014CM Ironworker 2005
Grizzly 12x36 lathe 2010
Wilton Belt sander and Cutoff Bandsaw 2006
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Just keep the front panel moist (I mentioned tire foam). and it'll likely last quite a while.
I like the 251. Nice machine. Very little to go wrong, Just blow it out once in a while and put dielectric grease in all the molex board fittings to prevent corrosion.
Really just basic maintenance.
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Wow, tire foam on the front panel !! seriously ?? what happens that causes this to help, I only ask cause I am a plastics guy by trade ??Miller Dynasty 300 DX TR, 2007
Miller MM 251 w/30A spool gun, 2005
Lincoln SP-100, 1990
Hypertherm PM 45, 2014
Scotchman 5014CM Ironworker 2005
Grizzly 12x36 lathe 2010
Wilton Belt sander and Cutoff Bandsaw 2006
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Originally posted by cruizer View PostVery thin membrane, just works better than most. To free the keys up, however if you have something different, perhaps you could suggest something else.Miller Dynasty 300 DX TR, 2007
Miller MM 251 w/30A spool gun, 2005
Lincoln SP-100, 1990
Hypertherm PM 45, 2014
Scotchman 5014CM Ironworker 2005
Grizzly 12x36 lathe 2010
Wilton Belt sander and Cutoff Bandsaw 2006
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Originally posted by Doug Doty View PostDare I ask opinions about my MM 251Bob Wright
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