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Hi Guys i'm new on here.Had my V205 since 05 and love it for AC welding.However it has always had a small issue on DCENThe electrode tip will continually ball, only slightly istead of holding a sharp point.This will happen on 15 amp through to max current.Please note this isnt an operator problem or a setup issue have tried everything to combat it.The internal electrode size setting doesn't seem to change anything.Nor does the ramp up setting, it seems there is an issue with the HF start?From what i have found on the web this is a common issue with the early machines and could have something to do with a blast of AC being used to start the arc?Has anyone got the same issue? is there a fix?Please help..... i'll buy you a
Reply:What kind of tungsten are you using?DavidReal world weldin. When I grow up I want to be a tig weldor.
Reply:Hi DavidFor DC "stainless mostly" i use a 2% thoriated although i have tried ceriated the gold ones anyway lol. Just tried tonight turning the electrode setting down to 1mm while using a 2.4mm thoriated on 1.2mm SS at 40 amps.1st strike of the arc and the tip has gone. This is only very fine tried to take a pic with my phone but the camera wasnt up to it.Just had a look at the lincoln site a the new "improved unit" has Improved TIG starting. Now starts DC(-) to maintain a sharp tungsten.So i guess thats them kind of saying that the first version wasn't to flash on this?
Reply:Do you have preflow? Settings shouldn't matter except pre flow. What is your gas flow rate? Pure Argon correct?Any tungsten except pure for DC-.Perhaps if you grind a small (.030 to .045) flat on the end of the point.DavidReal world weldin. When I grow up I want to be a tig weldor.
Reply:Krum,First thing to do is access the hidden parameter menu. If you read the manual it lists all the adjustments. With the machine off hold down the parameter button while switching the machine on.The display will show 0. The adjustment dial scrolls through the settings. Scroll through to 14, press the parameter button and you're now in arc starting parameters (amount of DCEP used). It's adjustable from 1.0 through to 2.4 . Set it to 1.0 and press the parameter button to return to the menu (14 showing again). The default or factory setting is 1.6 IIRC- my unit was set way higher than this from new (2000/2001)No1 in this menu is the initial amperage (set as a % of welding amps from 2-200%). No2 is the preflow time (0.5s default)To exit the menu scroll to 0 and press the parameter button- the usual start up routine continues.
Reply:Hi Guys,As is preflow is set at .1 which is a little to low will reset and see if that helps.The inbuilt menu is already set at 1.0 which doesn't seem to make any difference.Gas Flow is about 8, use pure argon or a hydrogen mix gas for stainless only which also doesn't make any difference to the balling issue.The other thing i changed is turning off all the hot start arc stub settings in the menu thinking this could be coming through. But also did not change the balling.Thanks for all the help guys
Reply:ok, set pre flow to 0.5sec no difference at all,on my machine parameter no 14 varies from 1.0 to 5.0Currently set at 1 with no change in the electrode balling.I use a lincoln auto helmet when the arc starts it is a lot more violent than my goldseal machine. I have emailed lincoln electric about if you can update the version 1 machine.... have to wait and see....
Reply:It's also showing 08 on start up before it displays amp setting,is this normal or is it an error code?
Reply:Found this post on another forum, guess i'm not the only one,does any one have a solution? circuit mod to do?Hello all from across the pond,Recently bought a V205T, which i am very plesed with.Only when Tig welding,DC,with red or gold Tungstens i am losing the point of the tungsten.Looks like i have been welding on AC.Have turned down start up amps as low as will go,But i keep losing point.I think it happens when i start up with the HF.Just seems to blow it off.Why is this?Have i got a problem with machine?Has anybody else experienced similar problems ? If so,What can i do about it?Parent - By OSUtigger (**) Date 10-31-2005 16:34Make sure you are on Straight polarity, Electrode Negative. If not, you will burn the tip off even faster than you would if you were on AC.glsParent - By Anthony James (*) Date 11-01-2005 08:02V205T will not fire up on pos,lol.Parent - By OSUtigger (**) Date 11-01-2005 18:55If the machine will not put out a current on electrode positive, and is burning tips on EN, then the problem is probably related. I am not familiar with the machine itself (ANY inverter should put out a EP current, either by setting a switch or by switching the work and ground), but I will bet that a diode is fried. How does it do on AC? HF is way too low of an amperage to actually cause any melting on anything thicker than a tinfoil gum wrapper, so I doubt it is that.I am thinking about getting one of these machines in the future and would appreciate knowing what the problem actually is when you find it. Thanks.glsParent - By Anthony James (*) Date 11-02-2005 09:00no inverter tech machine will put out ep.as we are talking about TIG welding NOT electrode.EP will blow! tungsten away.Most machines have 2 safety(also non invertec)1.No gas,wont fire up.2.wrong polarity,Tungsten+ Wont fire up.To reclarify,I like to weld with very sharp Tungsten.This is what i am used to .What i am experiencing is when i start up or after i have been welding for a short while The point is gone.either it is burning off or being blasted of with start up.1.i have pre purge turned up1.5 sec2. start up amps so low as will go3.after purge 6sec as i also do quite a lot alluminium workAfter stopping welding point inspection reveals small shiny ununiform point, no longer sharp,and i am not happy as i can not direct the arc as i would like.....cheers AJParent By Lawrence (****) Date 11-02-2005 13:00Anthony,Some high tech welding power supplies have a brief pulse of reverse polarity (measured in milliseconds) incorporated into the GTAW arc starting sequence. The length and power of that pulse may be adjustable by an internal potentiometer. Some inverters do not use high frequency at all but rather employ a capacitor discharge with that little pulse of DCEP added to help the arc jump. I have experienced machines that will indeed shine the end of a tungsten when not operating properly or with a factory pot setting for larger electrodes.So the end condition of your electrodes could be explained by an power supply out of adjustment or a bad diode.If the above is the case you will need an experienced Lincoln service rep to verify, advise and adjust or repair your power supply.Folks out there with older vintage Aerowave and Dynasty power supplies are quite aware of the condition you are experiencing. I can't speak for Lincoln but thats where I would start looking.Parent - By OSUtigger (**) Date 11-02-2005 17:14Sorry, I have never encountered a TIG that would not allow EP, as I have always rounded the tips of my Pure tungs on EP rather than heating up the spot on the piece or the table by blasting 250 amps of AC. I did not realize that this was internally prevented, and it will definitely play a part in my own consideration of the machine itself. Thank you.From the way you were describing the tip after starting the arc, I understood that the point was not even there, and it was rounded. Is this the case, as in the radius of the tip is equal to the diamter of the electrode, or is it a case where upon close inspection, there is no longer a needle point but still a cone that has a slight rounded tip? I don't think that you can expect there to be a perfect needle point after welding, only a pretty good one, and will probably depend more on the quality of the tungsten than it will on the machine itself.If you don't think this is the case, I would go to what Lawrence said and just take it to the service guys.glsParent - By Anthony James (*) Date 11-02-2005 17:44Thankyou OSU/Lawrence for your input,did just that went to my Lincoln dealer today.Appears that if i had a DC only machine this would not be happening,the fact that it is also AC mess's it up.Not sure on tech,Think because of inverter.Looks like i will have to get used to it and buy a reserve wheel for my bench grinder.Cheers AnthonyParent - By Lawrence (****) Date 11-02-2005 17:49Anthony.If your Lincoln dealer is telling you that you will "just have to get used to" the tips of your electrodes rounding off after a single arc start he is not doing his job very well.That machine ought to start a 0.040 tungsten sharpened to a fine tip at about 40 amps all the way down to about 3 amps with no effect on the tip at all after dozens of arc starts. If you are being told otherwise go up the ladder at Lincoln until you find a competent agent. You bought Lincolns flagship inverter Tig Machine it should perform well.Before you ship off your machine, do try a fresh 2% thorium electrode from a manufacturer that you trust just to make sure bad electrodes aren't the culprit.Edit: FYI. NOTE: (The Invertec V205-T AC/DC cannot be usedfor Electrode Positive TIG welding without special adapters.)http://content.lincolnelectric.com//...r/im/IM728.pdfParent - By OSUtigger (**) Date 11-02-2005 19:29Thanks Lawrence, thats what I was wondering. I can get used to blasting a pure tung with high amp AC, but I get a little worried when I am required by a machine's inherent design to use certain equipment, especially equipment that can not be purchased piecewise (for instance, I recently realized that I must purchase an entire A-arm or go on a junk yard hunt in order to find a M18-1.5 castle nut for the front axle of my truck. Why? Because GM decided to use a castlenut that doesn't exist in the US). I just keep promising myself that if I ever engineer something like that, my own father will cuss me into my own grave...Again, thanks to you both for the info.glsParent - By Anthony James (*) Date 01-03-2006 21:52Hi all,Just to fill you in on the saga of my new machine,V205T.Got a load of Cryogenic work,17.5mm/1mm wall,100% x-ray.Well i hadn't used machine for a while as i had been working away,set my machine up,6amp start 25amp weld current,1.6mm red tungsten and guess what its still blowing the point off,leaving a litlle ball.After 2 pipes of figthing to control arc called my dealers electrical dep and they came round expecting it to be small problem maybe down to me and my inexperience with machine,which is very possible.But they couldnt sort it out!technician called Lincoln Holland cos a guy there had a hand in developing machine,only to hear "Yes we know about problem of blowing point off and we don't have a solution as yet,but 2006 model V205-T problem has been solved" The technician looking a bit foolish said its the first that he has heard of the problem with this model.They have lent me a 160 amp dc machine so that i can get my work finished,no cost,which i am very happy about as i have 97 of these pipes to weld.But still leaves me with a machine that i find useless for the type of work i am doing at the moment,and if work goes good alot more on the way.Machine is made in Italy,are your machines made there also?Has anyone on this forum got a V205-T and has it got the same problem?Are your machines made in USA?By the way i bought complete machine with water cooler,so as i have only been working for myself now 20 months it was a pretty big investment for me,and this is the first good job(x-ray work) i have pulled in and i feel let down.Very very dissapointed!!!Comments,Advice appreciatedSo much for Lincolns flagship!Cheers nowAnthony JamesP.SI am what you call an "A"welder coded in Carbon,SS,Duplex,Zeron 100X,Cro-Mo,Monel 400,Inconel 625,Sicromal.GTAW,SMAW,FCAW,STT.Parent - By Lawrence (****) Date 01-03-2006 23:16It can be hard but my advice is to insist that you be given a machine that will perform as advertized and to your satisfaction or return your money in full, and most importantly, it must happen at once.The loaner thing is fine if they can provide a 2006 model in the next week or two to replace your lemon machine.If you can go back and get names and quotes of the Lincoln folks who acknowledged your problem and use that information as a club if necessary to drive them to do the right thing.I'm near the end (I think) of a year long warrenty battle with Lincoln and our local vendor over a Percision TIG 375 that is a certifiable lemon. Once I contacted the right people, Lincoln was quick to get the ball rolling on a replacement power supply with no further charge to me. I don't think Lincoln has a problem honoring the claims they make, but sometimes local sales folks don't have the ability to get the job done so you must politely step past them and move up the chain of command.I think with the loner machine they are showing some pretty good faith and that your on the right track. Just make sure you are not put off for any significant length of time.Parent - By Anthony James (*) Date 01-04-2006 08:01Many thanks Lawrence,Should be talking to sales rep today over problem,and was from plan to use that approach.After all it is a 3 star dealership and as i recently bought a 350C Pro MiG machine,they can either keep me happy or lose a customer.Bye for nowAJParent By Anthony James (*) Date 01-06-2006 11:11Well my machine is going back to Lincoln Holland.It appears that it starts up on pos then changes to neg and the delay is just that bit to long,which is reason why it blows point of.So fingers crossed when i get it back it will be the machine that i expected.Once again thanks for input.Anthony JamesParent - By ridesideways (*) Date 01-14-2006 19:39i can't believe i found this thread here. i bought the v205t last week from weldingsupply.com, paid $2400, and today discovered that DC tig was melting the point of the tungsten. now i find this thread. what the hell... am i going to have to send my brand new machine off for a repair?i used a miller dynasty 300dx all during school and never had a problem like this.i get one or two starts in DC tig and the point is gone. i'm using 1/16" La-1.5% tungsten.Parent - By billvanderhoof (****) Date 01-15-2006 05:19I think that this thread at least provides some evidence to use in arguing that your machine was shipped with a defect that should be repaired under warrenty.BillParent - By Anthony James (*) Date 03-25-2006 11:02Hi from across the pond,Well the final part in my saga v205T,Asked and got a FULL refund,was interested in trying Miller Dynasty but couldn't.Due to work commitments.Went to exhibition in Utrecht hoping they would be there but no.So i bought for an exhibition price Fronius Magic wave 2200 AC/DC,fantastic machine comes from Austria.Ridesideways,You got to insist on your money back.Cannot understand the marketing strategy from lincoln,if this was a car they would have recalled all of the machines,but instead my local dealer has dropped price from 4,900 ex tax to 2,850 for machine including water cooling,Says it all really!Good luck RSWAnthony JamesParent By devo (**) Date 01-08-2007 20:01I bought a V205T in 04/06. The literature states that the machine is made to use 2% thoriated electrodes for DC and AC. Having an aversion to radioactive dust, I use 2% ceriated electrodes and have never had a problem with electrode tips blowing off.
Reply:Ok Guys i have the solution, well a 90% solution anyway....Some of the machines were set wrong deep deep inside their little brain.I have the access code etc to reprogram them so if any one else has this issue email me and i'll send you a copy.It hasn't stopped the balling completely however you can hardly see it with the naked eye and it doesn't seem to promote arc wander as [email protected]
Reply:Sorry, missed the updates on this, good to hear you've found some improvement. Still doesn't sound right though- shouldn't be ANY arc wander even welding with a 1.6mm tungsten below 10A. While it shouldn't be needed to prevent arc wander, a high frequency pulse will stiffen the arc and improve focusDid you buy it new in 2005? I'm just curious why you waited for so long to address the issue- especially if it was under warrenty initially Originally Posted by Krumok, set pre flow to 0.5sec no difference at all,on my machine parameter no 14 varies from 1.0 to 5.0Currently set at 1 with no change in the electrode balling.I use a lincoln auto helmet when the arc starts it is a lot more violent than my goldseal machine. I have emailed lincoln electric about if you can update the version 1 machine.... have to wait and see....
Reply:Hi Hotrodder,Well i guess i should explain myself first. When i bought the unit maybe 04? i was using it mostly for AC, i saying that i was not an experienced sheetmetal fabricator and really didn't pick up on it. About 2 years later i started doing a bit more stainless work 18 gauge and lower. This is when the machine was used in a contracting situation and the fault stood out like a sore thumbIn Australasia the machines are only given a 2 year warranty if they are from italy (i also have a 350Pro) which carrys a 3 year warranty. In saying that the issue was really no more than a niggle you can still lay a good weld it's just a pain in the After not having much joy on here i contacted the service rep here in Auckland NZ he asked me all the questions you guys did about settings etc and said he had never seen it before but he had also never looked and didn't usually weld with the units just repaired them.About two weeks later he emailed me with a image of a slightly balled tungsten on a V205 he had in with starting issues.So he contacted the italian factory who provided this fix. Which involves going much deeper into the CPU and changing some of the HF values.He also told me that the US version has alot of differnces from our one on this side of the world and your guys units may not have this issue. 08 is the program number so i your machine is a 03 that shows a completely different program.And yes i did change the hot start and arc force setting from std down as low as they go to see if that helped which i didn't i think they should only work on the stick welding setting?So thats as far as i got, oh also my tungsten dia setting goes from 1.0 to 6 so that shows more differences in the internal programs?Thanks for the help guysRegards Krum
Reply:I have a US made 2005 Invertec 205, and no issue with this. I can keep a tip sharp from 10amps all the way up to 200, but I do get a lot of tungsten splitting, mostly when I do AC on aluminum at high amps. For sheetmetal, I have no tungsten issue. But this sure is an interesting thread to read up on the machine. I know very few welders who have spent the money to buy one.And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:Hi Rojo,Yes like i said in prev post sounds like there are alot of differences between the italian machine vs USA i wish i had the later my V350 is awesome.I also have a splitting issue using ceriated i hope i spelt that right, are you using this mix too?
Reply:As far as tungsten, After a long time I have found the glod really does work better than red on AC.DavidReal world weldin. When I grow up I want to be a tig weldor.
Reply:Originally Posted by KrumHi Rojo,Yes like i said in prev post sounds like there are alot of differences between the italian machine vs USA i wish i had the later my V350 is awesome.I also have a splitting issue using ceriated i hope i spelt that right, are you using this mix too?
Reply:Krum,I'm in the UK, machine is european spec (made by Selco in Italy AFAIK) but being an older version i'm not surprised there's some differencesParameter 14 (DCEP on starting) doesn't relate directly to tungsten diameter- it's a 200A machine, no need for anything bigger than 3.2mm (and that rarely). No idea what the the numbers relate to, maybe time, maybe arbitary unitsThe initial starting amperage (2-200%, parameter 1) doesn't relate to SMAW on my machine. Arc force and hot start are Nos 3 and 4 IIRC on my machineTungsten splitting with AC, wrong type of tungsten (for AC) and/or prepped incorrectly- snapping tungsten increases the likelyhood of it happening with ANY tungsten, ANY machineThoriated is particularly prone. I know it's a popular choice round here but i've never seen a manufacturer (tungsten or welding machine) recommend it's use with AC. I hate it, arc characteristics constantly changing (regardless of machine) and arc wanderCeriated is less prone but also known for splitting at high amperages. Zirconiated (white or brown, AC only) or lanthanated outperform the others. Zirconiated works best with a rounded tip (crayon shaped, tip between 1/3 and 1D of tungsten depending on amperage). Very stable arc and won't need re-dressing unless contaminatedLanthanated is available in various guises, black (1%), gold(1.5%) and blue (2%). I like the blue ones but they are hard to find, in the UK at least
Reply:Thanks for that hotrodder,Yes in New Zealand thoriated are only used for DC, just out of interest how many people think it's as bad for you as the safety experts say?? i've been using ceriated for DC and AC on my 205 because im lazy mostly We were always taught to use zirconiated for AC as this handles the heat best.I would say alot of my tungsten problems are from trying for to sharper point.I will try the initial amp setting and see if there is a difference. Strange that your unit came from the same factory as mine but runs a No3 program? vs a 8 on mine and a friend has a newer unit which displays 09 on start up.Thanks for all the help guys
Reply:The No 3 program/software version is because of it's age (bought it new around 2000/2001)The thoriated radiation thing, most people tend to be one extreme or the other- think nothing of it or paranoid about it. It's only the dust (from sharpening) thats an issue. Thorium is an alpha emitter, alpha radiation cannot penetrate the dead skin layer so is harmless to hold. Eating/breathing the dust from grinding is another thing- dumb, regardless of whats being ground. Inside the body it's a known carcinogen hence the warnings (no different from OEL for fume etc really).The only reason i no longer use it is because i feel lanthanated works better. While it's harder to find it's still cheaper than buying thoriated from my LWS
Reply:Hi HotrodderSo you are saying the lanthenated (bound to of spelt that wrong) is a better electrode for AC or DC welding?Thats good at least i wont glow in the dark if i carry it round all day!
Reply:Hey Krum,IMO 2% lanthanated outperforms thoriated (and ceriated) everywhere, AC and DC. I get more time before the tip needs redressing DC and a more stable arc with no splitting if i use it AC. The only downside to it is that it's hard to find, especially at sensible prices.I still use zirconiated quite often when welding with ACGoogle 'diamond ground' for everything you've wanted to know (and a lot you probably didn't) about tungsten electrodes. 'pro-fusion' also has some articles on tungsten and a lot of info on pulsed welding parameters including a pulse parameter calculator
Reply:Thanks for that mate i got some on the way, don't think they are that expensive really,i'll try them out |
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发表于 2021-8-31 22:27:41