Dynasty 350dx question

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Is there anything new about the 350dx recently ?  The reason I am asking is that I may have an opportunity to get either a new 350dx or 280dx at cost .  Not sure which to get, 280dx seems to have the sd card slot for future upgrades.Miller 350PMiller 30AHobart trekHTP Invertig 221
Reply:I have the 280DX. One hell of a welder, It more than meets my needs! I'm told the 350 is bigger and has amplitude feature. You won't go wrong with either.
Reply:Word on the street (or rather on the Welding Tips & Tricks forum ) is that Miller is going to make available a software upgrade to allow the 280DX to have independent amplitude adjustment.  I have no idea how credible that would be, just saying what I heard.  That would make it an even better deal. 1st on WeldingWeb to have a scrolling sig! HTP Invertig 400HTP Invertig 221HTP ProPulse 300HTP ProPulse 200 x2HTP ProPulse 220MTSHTP Inverarc 200TLP HTP Microcut 875SC
Reply:If you can can them at cost then buy both!  I'll pay for the one you don't want.  I'll even throw in a case of beer for your troubles. Ben
Reply:Originally Posted by OscarWord on the street (or rather on the Welding Tips & Tricks forum ) is that Miller is going to make available a software upgrade to allow the 280DX to have independent amplitude adjustment.  I have no idea how credible that would be, just saying what I heard.  That would make it an even better deal.
Reply:That's crazy right there.  Best value in a tig in terms of sheer number of options 1st on WeldingWeb to have a scrolling sig! HTP Invertig 400HTP Invertig 221HTP ProPulse 300HTP ProPulse 200 x2HTP ProPulse 220MTSHTP Inverarc 200TLP HTP Microcut 875SC
Reply:I wonder if they are going to charge for an upgrade like the syncrowave 210 with as cardsMiller 350PMiller 30AHobart trekHTP Invertig 221
Reply:Yes, I am sure they will. There is currently one upgrade available for the 280 (something for automation) that costs just over a grand retail. If this upgrade costs that much, I can't imagine it will sell very well.
Reply:So the gap between that and the 350 gets even smaller I assume ?  Can the 350 do the amplitude ?Miller 350PMiller 30AHobart trekHTP Invertig 221
Reply:Yep!You "know" they will!The link to the online manual revealed the word "purchased" twice on the same page.Wow a grand! Retail For a software upgrade?Dammm
Reply:It would be good to know the effects of the different parts of the phase. E.g. maybe if you push up the amplitude and use an advanced square wave during the cleaning part to bust through the oxide you can get away with much lower amps and one of the less aggressive waveforms during the welding part. End result? Less total heat input.I guess it would take a Miller welding engineer to tell us, or one of the guys here with a 350 or 700 and too much time on their hands to experiment.
Reply:Are you saying the amplitude upgrade for the 280DX is $1,000? How about it Steve, Is it worth it?
Reply:No, I don't have any inside knowledge of what it will cost. There is only the one upgrade available at this point (it's an upgrade for automation), so that's the only data point we have to predict with.
Reply:I'd buy it... if it's under $99. Very cool option, but so beyond my ability it's laughable.Regards,RobGreat Basin WeldingInstagramBlue weldersRed weldersMy luscious Table DIY TIG Torch cooler
Reply:Originally Posted by metaljongIt would be good to know the effects of the different parts of the phase. E.g. maybe if you push up the amplitude and use an advanced square wave during the cleaning part to bust through the oxide you can get away with much lower amps and one of the less aggressive waveforms during the welding part. End result? Less total heat input.I guess it would take a Miller welding engineer to tell us, or one of the guys here with a 350 or 700 and too much time on their hands to experiment.
Reply:It's Steve's but getting sore, meanwhile I'm learning something. Keep spanking. I like to make outside corner box joints in 6061 .065 thick, I use a 2" piece of square stock copper with a radius on the corner. If the world were perfect, I could heat enough to penetrate fully and collapse the inside of the joint to touch and take the shape of the copper heat sink. I tend to do fine a couple of inches, then blow a big hole. I don't think I'm getting heat saturation, 'cause I only weld a couple inches before moving elsewhere. A 2" copper bar swallows a lot of heat!
Reply:1. Where is weld heat generated during AC cycle in GTAW?2. Which part of the AC cycle does cleaning occur?3. What is the ultimate benefit of reduced EP?4. Why does a Dynasty200DX have magical properties without independent amplitude?Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:Originally Posted by shovelon1. Where is weld heat generated during AC cycle in GTAW?2. Which part of the AC cycle does cleaning occur?3. What is the ultimate benefit of reduced EP?4. Why does a Dynasty200DX have magical properties without independent amplitude?
Reply:Terry, did you give the 280 back? Or did you end up buying one?
Reply:Originally Posted by dave powelsonWell....for starters on a 350 setup--study miller's two page, quick, cheat sheet.Right out of the gate, they recco adjusting the en/ep ratio depending on the task at hand.1 EP: 2EN ratio works quite well for me and in effect that is altering the amperage amplitude ofthe wave form, despite DynaSteve's assertion of 'insanity'.The 350/700 allow for infinite tailoring of the arc....if one chooses and that does make all the difference.There's more than one way to setup a 350 and get results, depending on the operator.Steve's assertion that 'Most of the credible ppl who own 350s are telling me Soft Square and equal amplitude gets it done in almost every case.'....I guess that slams the door on such non-credible folks as Chris Razor, John Marcella, B.C., etal.Most of the AL I do is repair and that requires, cranking the setup to get the desired arc, using any of the 4 waveforms, etc.Failure to even try various settings (and forget everything you know about setting up older invertersand trannies, when playing with a 350) is simply not using the machine to anything close to its full potential;and it still surprises me, just how well it can do things that my old units--could not.'Busting thru the oxide' is normally done, by some prep prior to welding.Using the machine to do this, simply means a whale of a lot of extra heat input that immediately trashes the work.There is no substitute for decent prep work.Bare minimum heat input, on AC, on AL is achieved by 'high energy pulsing', a slow pulse that is2-3X the amps required for a normal weld, while the travel speed is rapid in comparison. The AC frequency ramp up, really, really helps for stiff arc, even when setting balance at 60-65% when faced with dirty AL castings, weldments.For really contaminated, poor quality AL castings--'Massive focused heat succeeds, where all other methods-fail.'
Reply:Originally Posted by zankTerry, did you give the 280 back? Or did you end up buying one?
Reply:I'm so anxious to get my hands on one.
Reply:Originally Posted by zankI'm so anxious to get my hands on one.