Millermatic 255 with pulse!

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Miller is at it again. Apparently this is new and I'm not sure it is available or soon to be. https://www.millerwelds.com/equipmen...08-240v-951766Front looks like their new Multimatic 220 AC/DC but it is a MIG with a higher duty cycle. I guess it could do what a 252 would, haven't compared the specs in depth.Edit: Ok when you open the link a window pops up that says "comming soon".Ernie F.
Reply:Nice!  Cuttin' down on the weight!  Something I need to do as well! LOL 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:with the exception of the pulse feature, and the fact that it is an inverter (the 252 is a transformer machine), it has virtually the same specs as the 252, with one exception. The 252 always boasted about its max output being at 28 volts, and how that was the highest in the industry or something. The 255 hits the output at 25.5 volts. But man I am loving the Bernard gun the 255 comes with.Miller Multimatic 255
Reply:The spec sheet claims 20-350 amp output.   What happened to proofreading prior to publication?Tiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:Originally Posted by soutthpawThe spec sheet claims 20-350 amp output.   What happened to proofreading prior to publication?
Reply:I really don't know how big a deal the voltage numbers are? Maybe the inverter vs. transformer has something to do with that. Does appear to match up to the 252. And previously if you wanted a machine with a pulse you went from the 252 to the 350's. I am going to look for reviews or what ever users have to say. This one has me thinking about a possible upgrade with a push pull set up with aluminum if that would work.Ernie F.
Reply:Yeah not sure either. The only reason I would think it is a big deal is if you need that voltage to run certain wires (thinking of dual shield or metal core here) some of those wires need more than 26 volts to hit the higher wire feed speeds.Miller Multimatic 255
Reply:In the manual, the rated output for 40% duty cycle is 27 volts @ 260 amps.ESAB Migmaster 250 Hobart Ironman 230Multimatic 215TWECO Fabricator 181i & 211iHH125EZ - nice little fluxcore only unitMaxstar 150 STH - very nice
Reply:"Coming soon". I hope it doesn't take a year-plus to get them out there. Every time I consider a change or upgrade they (not just Miller) make you wonder if you should wait.Ernie F.
Reply:Couldn't find anything from Sema about the 255,and nothing on you tube. Not sure Miller will have a demo on display at the Fabtech show either. They did follow through with the 220 AC/DC multi-process fairly quick though so who knows when "coming soon" is.Ernie F.
Reply:I am standing in front of the machine right now at Fabtech. It has fan on demand and will be available in January. They have a mult-process DC tig model 255 coming out in January as wellSent from my SM-G930V using TapatalkMillermatic 252 MIGMiller Dynasty 200DX TIGMiller Spectrum 625 PlasmaAltas 12x36 Metal LatheBridgeport Milling Machinewww.psacustomcreations.com
Reply:Originally Posted by psacustomcreationsI am standing in front of the machine right now at Fabtech. It has fan on demand and will be available in January. They have a mult-process DC tig model 255 coming out in January as wellSent from my SM-G930V using Tapatalk
Reply:Originally Posted by metalman21COOL! Is the 255 just on display or is it a demo?
Reply:I wonder what type of pulse features it has? Pulse on pulse? haven't found any info on it. Crater fill- Hot start etc.
Reply:Originally Posted by 2RocketsI wonder what type of pulse features it has? Pulse on pulse? haven't found any info on it. Crater fill- Hot start etc.
Reply:Better hurry up and order one Millers annual increase is coming January 14
Reply:there was one at my lws today , can pick the whole thing right up, with the running gear ! only 80 some pounds !trailblazer 325 efi excelSlugger sawMiller 12vs Miller 135hypertherm45xpLincoln Sp 200 Lincoln Idealarc 250  Ac/ Dchougen and Milwaukee magstrailblazer 250g "1987"HTP aluminum feeder ahp alpha 200dangerous amount of tools
Reply:Originally Posted by Louie1961 But man I am loving the Bernard gun the 255 comes with.
Reply:Ok Louie, you bought one, tested it out?, what's the report? There was one at the local Airgas, first impression, to me, was that it was bigger than I perceived from only viewing online pictures.I guess the price went up from the initial roll out, I didn't ask at the store.Ernie F.
Reply:Its really nice. I haven't tried it on C100 or C25 yet. I did get a tank of 90/10. With 9010 and 0.035 wire, it short arc welds just like my MM 252 used to. Same arc quality. With the factory supplied single cylinder cart, its not really that much smaller than the MM252. It feels like the cart makes it a bit longer than it really needs to be. I am sure this is because they must have had problems balancing a 330 cubic foot tank against the relatively light 80 lb inverter. I think the cart is relatively long so that it puts the weight of the power supply farther from the bottle. The tank also leans forward. You can tell that if they didn't do these two things it might pop wheelies. As far as pulse mig, it works well (no spatter), but I am still learning how to tweak the arc length to get the bead profile I am after. in pure synergic mode, the beads on a fillet weld come out a little "ropey". But it is easy to operate in pulse mode, and I haven't had any burn backs or any other issues. Unfortunately, with work, and moving my daughter to college this week, I have not had a bunch of free time to really dive in and experiment. I LOVE the way it stick welds. The arc starts are way different than any welder I have owned before. Its almost like a lift start TIG in some ways. Touch the rod to the plate and at first you get a tiny spark, then the arc starts. Its a much quieter arc start than say my syncrowave or idealarc 250. I have yet been able to make it stick a rod, maybe because of the hot start and arc force? The stick arc is really customizable. I haven't had a chance to hook up my foot pedal or TIG torch yet, so nothing to say there. Overall I only have a couple of hours of arc time on it, but I really like it. They definitely change the gun, and it is a Miller MDX, not the Bernard, which is a shame. I don't hate the MDX gun, but the angles on it are not as nice as the HTP or Bernard guns I had on my MM 252. One nice point, the MM 252 drive rolls all fit the 255 without any issues, so I am glad I didn't let the extra drive rolls go with the 252 when I sold it.Miller Multimatic 255
Reply:Originally Posted by Louie1961 I LOVE the way it stick welds. The arc starts are way different than any welder I have owned before. Its almost like a lift start TIG in some ways. Touch the rod to the plate and at first you get a tiny spark, then the arc starts.
Reply:Originally Posted by OscarThat's pretty nifty!  I never heard of any other machine implementing that kind of arc-starting for stick welding.  I can only imagine the arc start is as smooth as a baby's butt!
Reply:Originally Posted by MunkulIt'll be the VRD system and the way its tuned, it's becoming the normal with a lot of new stick machines.Looks like a great machine from the paper specs. Duty cycle 230a/25.5v at 60% is better than the old MM252, which was only 200a/24v at 60%DC.The "EZ select" MIG gun with it's selectable programs sounds like Miller is finally advancing with the times... Fronius, EWM and Lorch have all had on-gun controls for years and years now.
Reply:Originally Posted by OscarI know the VRD reduces the OCV (mine have that as well) but it almost sounds like the 255 is doing some thing different.  That's how I understood it.
Reply:I have never used VRD before, so I have no frame of reference. It could possibly be VRD. I will have to check the manual and see if that is an adjustable feature. As far as rods, this is the same batch of rods I have had forever. Like since 2017 at least. Or at least the same rods I used with the Syncrowave and the Idealarc.Miller Multimatic 255My initial interest in the 255 was the pulse and how that would be useful or improve aluminum MIG. I have a MM250 with a Spoolmate 30 and hardly use it much anymore. It doesn't take me that much more time to TIG and the welds are better, at least on the aluminum 1"X1" tube frame work I used the spool gun for.I read that you need 90/10 for the pulse welding steel, kind of a issue swapping the 75/25 or adding tanks. But I'm still curious.Ernie F.
Reply:You do need either 90/10 or 98/2, or any other gas suitable for spray welding. But with the 90/10, the machine has a program for doing short circuit welding. I tried it and it welds on par with the way my Millermatic 252 used to weld on C25. Someone with more experience than I have might be able to find some differences, but I couldn't. I am using 90/10 for everything at this point: short circuit, spray and pulsed spray.Miller Multimatic 255
Reply:Originally Posted by metalman21My initial interest in the 255 was the pulse and how that would be useful or improve aluminum MIG. I have a MM250 with a Spoolmate 30 and hardly use it much anymore. It doesn't take me that much more time to TIG and the welds are better, at least on the aluminum 1"X1" tube frame work I used the spool gun for.I read that you need 90/10 for the pulse welding steel, kind of a issue swapping the 75/25 or adding tanks. But I'm still curious.
Reply:Why bother? Just use 90/10 for everything.Miller Multimatic 255
Reply:Originally Posted by Louie1961Why bother? Just use 90/10 for everything.
Reply:The European mixture of choice is 82/18, or 92/8, for steel. Lets you run short arc, spray and pulse.We use mostly 83/15/2 Ar/CO2/O2 which fits in well with the 82/18 synergic programs. In theory, O2 is equivelent to 2 CO2, so roughly 80/20 equivelent.Also 93/5/2 as a "light" mixture.Can you not spray with 75/25? Or is it just the voltages don't go high enough to give a good arc length?Murphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:You can "force" a machine to sorta spray with 75/25, but the arc length ends up being real long with so much added voltage, and will be very prone to under-cut with such a wide flaring arc. 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 thought more CO2 shortened the arc length... am I wrong then? Going from a "light" to a heavy mix on say 250+ amp spray, you run a few more volts to acheive the same arc length, but you end up with way more penetration.No experience of 25/75 though.Murphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:Originally Posted by MunkulI thought more CO2 shortened the arc length... am I wrong then?