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  • KB Fabrications
    started a topic Dynasty 350 DX: Variable Polarity

    Dynasty 350 DX: Variable Polarity

    Sooooooooo, I have had this machine for a few months now and have been ****ing around with the settings on AC to see what all the hype was regarding the variable polarity feature. I have decided that I really like the VP capability but I would also like to stress that by no means is it necessary to successfully tig weld aluminum. I think Miller actually dropped the ball BIG TIME by doing away with the Dynasty 300. They may have something else in store but as it sits, there is a huge gap in their inverter tig lineup between the D200DX and the D350DX.

    For those not in the know, the Dynasty 350 has 50 more amps and a few more bells and whistles. The real improvement was supposed to be on the AC side where you could independently set the amperage values for each half of the electrode positive and electrode negative cycles. The values can, according to Miller, be set to "provide enough cleaning while putting more amperage into the part". It is also supposed to give better penetration and faster travel speed. Tungsten life is also supposed to be better using more EN amperage.

    This is a tool holder I made for my lathe this afternoon. I used the VP feature on the 350 to make these welds. The settings were as follows:

    Machine set at 250 amps
    EN Amperage = 268
    EP Amperage = 143
    Balance = 75
    Frequency = 120
    3/32" blue tungsten using a gas lense and #7 cup

    The material was 1/4" 6061 and the filler was 1/16" 5356. The ratio of EN to EP was 2 to 1. What you do is set your EN amperage to 200 and your EP amperage to 100. Then, set the welding amps to whatever you want and it will maintain that 2 to 1 ratio. The 2 to 1 ratio is also just a recommended starting point. You can basically set the thing to any ratio you want for any given welding task. The balance setting will also have an effect on the "average" that the welding amps end up at.

    The first thing noticable was that the puddle formation on the 1/4" material was almost instantaneous. It took maybe 3 seconds before I was ready to add filler and then it was just "get after it". The etched cleaning zone was also substantially smaller than it would have been on the 300 with the same settings, sans polarity adjustment. The really remarkable effect was the lack of tungsten degradation. I welded 6 two inch long beads and the tungsten looked like I had just sharpened it. That would never have been the case if I were using the 300DX or a conventional machine. I pretty much had the pedal maxed, or slightly less, for this project.

    The pics are as follows:

    1. The toolholder I was making. there are 3 two inch long welds on the top and the bottom.

    2. Weld close-up. The wet in at the toes on these settings was awesome.

    3. Another close-up of a different weld at a different angle.

    4. Tungsten close-up after the 6 welds.

    5. Same as #4.



    I have more work and testing to do but my preliminary results are super positive. If you have any questions, I will do my best to try and answer them.
    Attached Files

  • Checkered Flag
    replied
    I sold my 300 in order to purchase the 350.

    Don't regret it at all. The waveforms are very nice to have, I can justify the price difference.

    Now granted all I do is aluminum, and with the 300 out of warranty, 50 more amps, extra waveforms and EN/EP adjustability it was a no-brainer.

    Like I said, I use it just about every day and love it.

    Kinda see this like the wireless pedal, some may/may not need it. However once you use them, your mind just may change... I sure don't miss kicking that cord around

    Leave a comment:


  • shovelon
    replied
    Originally posted by iliyahamovic View Post
    Defenetly would be great to have dynasty 250 but I guess Miller has its own reasons.
    my first Miller tig was Diversion 160 and with 20% helium mixed with argon I was blasting 1/4 aluminum with no problem putting little buddy into the limit without paying atencion to duty cycle many time.
    I sold it about year ago to buddy of mine and little Diversion is still working with no problems at all.
    After Diversion I got Syncrowave 200 good working horse but it didnt gave me nothing that little Diversion didnt...
    Im getting Dynasty 200dx tomorrow with cooler and all gagets needed, I didnt have extra $ to spend on 350dx and Im not sure how often I'll weld thicker than 1/4 aluminum and if I do I'll add up some helium and I believe with no problem I'll reach about those 250A with it that some of us whine about...
    So lets dont forget how Miller is been good to us by giving us best machines on the market period and not to talk about great customer service... no doubt no one is perfect but these guys are pretty **** close!
    I know one thing and that is that I will always buy Miller and always wave their flag, Thank you Guys and merry Christmas and happy holidays.
    Amen to that. You are going to love your 200DX.

    Leave a comment:


  • iliyahamovic
    replied
    200dx 350dx...

    Defenetly would be great to have dynasty 250 but I guess Miller has its own reasons.
    my first Miller tig was Diversion 160 and with 20% helium mixed with argon I was blasting 1/4 aluminum with no problem putting little buddy into the limit without paying atencion to duty cycle many time.
    I sold it about year ago to buddy of mine and little Diversion is still working with no problems at all.
    After Diversion I got Syncrowave 200 good working horse but it didnt gave me nothing that little Diversion didnt...
    Im getting Dynasty 200dx tomorrow with cooler and all gagets needed, I didnt have extra $ to spend on 350dx and Im not sure how often I'll weld thicker than 1/4 aluminum and if I do I'll add up some helium and I believe with no problem I'll reach about those 250A with it that some of us whine about...
    So lets dont forget how Miller is been good to us by giving us best machines on the market period and not to talk about great customer service... no doubt no one is perfect but these guys are pretty **** close!
    I know one thing and that is that I will always buy Miller and always wave their flag, Thank you Guys and merry Christmas and happy holidays.

    Leave a comment:


  • Paul Seaman
    replied
    Dandimand, You have the Cats Bum in the Aerowave,,Absolutely and posatively. I also agree with the Dynasty 200DX comment, I do mostly 1/8" wall Al tubing and it varies alot in quality. The 200 DX makes up for where I am lacking. Rescently I welded some dirty stuff with 3/32" 2% ceriated, 200 amps 60% balance 250Htz and 500PPS unbelievable, shaking the puddle and floating all the crap to the top. Just a slight buzz with a roloc and life is gooood!!!

    Engloid while I understand the wave chart, what the additional adjustability does for me is saving me from needing a heavier machine on a shoestring budget. Yes a Traditional machine would do most of it fine, I am just not quite that good and the machine makes up for my inequities. I could wish for your skill, but I play the string I have to the best of my ability. You as with alot of the guys here are craftsmen of the highest caliber.

    I commend you all, and thank you for the education you provide.

    Peace,

    Leave a comment:


  • dseman
    replied
    Interesting. Time will tell if Lincoln has solved the problem of a reduced amperage output while in Tig, squarewave-mode, with high AC frequencies.
    Also, when it comes to duty-cycle ratings, keep in mind that those specified are for GTAW with Argon. SMAW at the same amperage has significantly higher arc voltages and lower duty-cycle ratings to match. Miller's duty-cycle ratings are based on the worse case power draws of SMAW. That said, I'm looking forward to test driving one. Miller has been the King of Tig for a long, long, time. Maybe now they will start to get some real competition from Lincoln.

    -dseman

    Leave a comment:


  • ShieldArc
    replied
    Here it is and its not rated at 15% duty cycle. hahahahaha

    Invertec V310-T AC/DC
    Customize the Arc with Dynamic Display

    The Invertec V310-T AC/DC is the most technologically advanced TIG welder in its class. The large bright LCD screen shows all of your settings at a single glance. This patent-pending dynamic display changes as you adjust the machine to show the effect of each setting - makes set-up of this full featured machine a snap. Once you get the machine set how you like it simply save your settings to memory for easy recall later. Couple this with inverter arc performance, lightweight size, and low current draw makes the V310-T AC/DC ideal for any shop or field applications like advanced motorsports, aerospace, shipbuilding, and construction.

    • Dynamic LCD Display – Shows the effect of adjusting the various welding parameters making setup simple.
    • Adjustable AC Frequency and Selectable Waveshapes – Allows you to customize the arc.
    • Soft, Crisp and AC Stick Modes - Excellent welding performance for all electrode, even E6010!
    • Optional Cool-Arc 35 “Smart” water cooler – Digitally controls the speed of the water cooler’s 3-phase pump motor based on coolant temperature for quiet operation and long dependable life.
    • 208-460 1/3 phase auto-reconnect – Weld just about anywhere with minimal set up.
    • High Efficiency Inverter-Yields extremely low input currents.

    Product Name Product Number Input Power
    Rated Output
    Current, Voltage,
    Duty Cycle
    (104F, 40C) Input Current @ Rated Output Output Range HxWxD Net Weight
    Phase Voltage/ Hertz
    Invertec
    V310-T AC/DC K2228-1 Three-Phase 460/50/60 210A/18.4V/100%
    230A/19.2V/60%
    310A/22.4V/40% 7.3
    8.3
    12.3 3-310 A

    Max OCV : 80V 17.3 x 10.6 x 24 75 lbs
    230/50/60 210A/18.4V/100%
    230A/19.2V/60%
    310A/22.4V/30% 13.9
    15.8
    24.6
    Single-Phase 460/50/60 200A/18.0V/100%
    220A/18.8V/60%
    310A/22.4V/35% 13.6
    14.9
    23.1
    230/50/60 200A/18.0V /100%
    220/18.8V/60%
    310A/22.4V/25% 21.9
    24.6
    41.5
    208/50/60 200A/18.0V /100%
    220A/18.8V /60%
    310A/22.4V/25% 24.2
    27.7
    47.3

    Leave a comment:


  • FusionKing
    replied
    OOOHHHHH YEA!!!!

    Competition is good for bizness

    Leave a comment:


  • ShieldArc
    replied
    Lincoln is about to release their new INVERTEC V305-T Tig machine, now you know why miller hasnt filled the hole, they need to copy the Lincoln machine again. You will be shocked at what this machine will have and do coal.
    I cant say no more, i'll get shot..

    Leave a comment:


  • ridesideways
    replied
    Originally posted by ShieldArc View Post
    No, your wrong...
    The specs come out of the owners manual..
    In the 350 manual it says 250amps at 30% duty cycle!!!
    So why is it called a 350? Because u can weld at 350amps for 1 1/2 minute?
    Also in the owners manual it says,,, NOTICE − Exceeding duty cycle
    can damage unit and void warranty.
    lol yes i know it says those specs in the manual. the manual was clearly written by someone whose intent was to prevent litigation-- the 350DX is just getting warmed up at 250A.

    well.. i guess all i can say is enjoy your 250A machine...

    Leave a comment:


  • Engloid
    replied
    Originally posted by ASKANDY
    We absolutely know where our holes are and second, why would we tell the world our long term goals just to have the competition run to fill them.
    Because the delay in letting people know that you have something on the way to fill a gap can cost you customers. If you lose their business on the next machine, they could change loyalties to another company.
    Originally posted by ASKANDY
    Now I know some would say YES, but in the big picture, the industrial customer or heavy Aluminum customer this machine was designed for has no issue with the cost verses the added features.
    Our plant welds aluminum all day, every day. We sell nothing but aluminum products. From what I have found, the 350 hasn't got any features that help us, but they to confuse/complicate matters for many welders that couldn't chart out a 60%+ Ac wave if their life depended on it. Sad, but few welders actually understand that stuff. Even the ones that do have not seen any benefit. If you have any tips on setting these parameters, I'm all ears though.
    Originally posted by ASKANDY
    Be advised, we know what the market wants, and the plans have been on paper long before anyone here thinks they know better.
    Do you have any mid-year options coming out, or will there be no changes till the next year?
    Originally posted by ASKANDY
    I hope this soothes some of your concerns.
    It's good to hear something, even if it's not something I wanted to hear, or if I don't particularly agree with it. Sometimes no news is bad news.

    Leave a comment:


  • dandimand
    replied
    Well Im a nut I guess as I like to pay for bells and whistles hence why i bought a full feature aerowave at over 10 k many years ago . Tried the new 350 but honestly It had not one advantage over my aerowave .IMO . Im still kinda old school and prefer to do most of my aluminum with a zirc balled tung .and my frequency at 40 on anything over 1/8" inch with around a 58 to 62 balance and I do run my ep around 130 and my neg up to 300 . I love the pulse etc.. and the abililty to adjust both pos and neg amperage as saves the hassle of going to a 1/8 tung i can use 3/32 for most of my stuff with just a quick change for mild steel moly etc.. to aluminum without changing collets .also on that note though for portable stuff the dyn 200 is the cats bum .

    Leave a comment:


  • ShieldArc
    replied
    Originally posted by ridesideways View Post
    no, you're wrong. the names are actually rated correctly, but the miller specs are under-rated. you can run the 350DX @ 350A on 1 phase power for a decent duty cycle (at least 40% but i didn't measure it). i know because i've done it and it works fine.
    No, your wrong...
    The specs come out of the owners manual..
    In the 350 manual it says 250amps at 30% duty cycle!!!
    So why is it called a 350? Because u can weld at 350amps for 1 1/2 minute?
    Also in the owners manual it says,,, NOTICE − Exceeding duty cycle
    can damage unit and void warranty.

    Leave a comment:


  • ridesideways
    replied
    Originally posted by RonL View Post
    I think the niche they need to fill is a 208/230 volt single phase only shop tig machine on the order of the Shopmate 300DX. I would like the single phase capabilities of the dynasty 350DX but it would be foolish of me to spend the money on an expensive 1/3 phase machine that will spend the rest of its life in a single phase shop. I would assume that it would be cheaper to make a single phase 208/230 volt only machine if the sales volume is there. I believe that the sales volume is there as there are many who have single phase only. I think the apparent success of Thermal Arcs 185 AC/DC Arcmaster shows that people will buy a 208/230 volt single phase machine that is cheaper and simpler than the equivalent 1/3 phase machine.

    RonL
    i wouldn't write off the 350DX based on those (rational) assumptions. first, i've found that it runs just fine at full power 350A on 1 phase powere, even though the specs don't say it. second, the cost of a high-quality rotary phase converter is pretty small (~ $900) compared to the cost of the 350DX welder-- and once you have the phase converter then you're guaranteed to get full power from 3 phase input.

    Leave a comment:


  • ridesideways
    replied
    Originally posted by ShieldArc View Post
    This is what i see in the single phase DC TIG ratings,

    Dynasty200 is rated
    100amps at 100% duty cycle
    150amps at 60%

    Dynasty300 is rated
    180amps at 100% duty cycle
    200amps at 40% duty cycle

    Dynasty350 is rated
    180amps at 100% duty cycle
    225amps at 60% duty cycle

    Syncrowave 250
    200amps at 60% duty cycle
    250amps at 40% duty cycle

    Syncrowave350
    300amps at 60% duty cycle
    350amps at 40% duty cycle

    The problem is the Dynastys names are over-rated. The Dynasty200 name is over rated worst, it should be a Dynasty160 or 175 at most.
    no, you're wrong. the names are actually rated correctly, but the miller specs are under-rated. you can run the 350DX @ 350A on 1 phase power for a decent duty cycle (at least 40% but i didn't measure it). i know because i've done it and it works fine.

    Leave a comment:

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