|
|
Just got me a whole bunch of beverage bottles that had been laying around for years. I thought I would give them a try just to see how it works. My machine is an old Century 160A machine. Wire is .035 solid.The result with CO2 was less than satisfactory. What I got was the wire hitting the puddle then burning back and repeating itself. A lot of the time there was no arc at all so the total heat input was down somewhat. Beads on flat metal were tolerable but not great. I switched back to C25 with the same settings and the arc became stable and easy and it appears to me much more heat being laid down. I am running with the voltage maxed out and wire speed about 50% which is all the machine will do with C25 for the most part.It seems like the CO2 is not working as well as it should. I figured there would be more mess but there wasn't really, just an unstable arc. What should I be doing?Birken
Reply:Well, the settings will be different; you didn't say you tried other settings. Seems like you needed more wire speed, which is why a CO2 weld can penetrate more when you set it up right.
Reply:Did a little more playing with it; the wire speed is definitely at the highest it can go and the voltage is maxed out. It seems if I increse the gas flow from an indicated 20 CFH to 25 (pressure/orfice regulator) it behaves a little better, as well as keeping the stickout to a minimum but it is very touchy with the wire speed adjustment and torch position. Obviously the machine is running at or near its limit here....Birken
Reply:Do you have any of the smaller wire around to play with?? Seems like a 160 amp machine shouldn't be that problematic. What size samples were you using ? Just nosey here.
Reply:I use CO2 routinely for GMAW. I run about 12-15 CFH flow, the same as for an argon mix. I haven't experienced a machine yet that didn't have it in the middle of its ranges; it's not THAT different from an argon mix...I agree, try a different wire size just to see what your machine prefers. I would probably prefer a .030 wire for that size of machine anyway.
Reply:Bottom line is co2 is cheaper to run and has more spatter. If voltage is maxed try lowering wire speed this will increase voltage and raising will lower voltage.
Reply:Originally Posted by Dipper Welder64 If voltage is maxed try lowering wire speed this will increase voltage and raising will lower voltage.
Reply:If you really want to educate yourself??? Go to this website:http://www.weldreality.com/ Ed Craig does know his stuff!!! I highly recommend this to anyone that uses Gas Metal Arc Welding (GMAW, otherwise known as MIG or Metal Inert Gas even thuogh CO2 is'nt inert) or Flux Cored Arc Welding (FCAW) and even metal cored filler wires...Ed also covers the various mixes of gases used on mild steel, stainless grades, and aluminum. de-myths soem of the sales oriented hype that is overwhelming in the welding supply industry today. Mr. Craig emphasizes process control!!! You'll learn how to properly set your power sources to produce optimal welds on the most common metals used today and I must warn that theres' an abundance of information to absorb but, All of it is well worth it!!!If you already know how to run a mig weld, this website is for you and even if you're still in the learning phase, this website is also for you!!! Ed Craig even has a board where you can ask him some rather technical questions but, if they're basic, fundamental questions, he'll push his books and other educational material on you so, beware when you ask him questions!!! All in all most of the info found in his books can be found in his website so, look around inside every link. I promise that you will not be dissatisfied!!! Respectfully,SSBN727 Attached ImagesLast edited by SSBN727; 11-12-2006 at 08:46 AM."Run Silent... Run Deep!!!
Reply:um lowreing or raising the wire speed will not change the volts ,only the ampson a gmaw or fluxcore machineChopper think about it if you adjust the wire speed up or down it can help adjust the caractaristics of the weld,and yes the voltage stays the same but is manipulated by the change in wire speed same thing as increasing or decreasing stickout, I weld with 71m and have a day to day exprience with it.
Reply:Hi!From my experience, pure CO2 is really good with some flux-cored wires only. For solid wire you can use almost any gas but "92%Ar - 8%CO2" is definitly my best. Why? It reduces spatters a lot. Remember that you need a minimum of 80% of Argon to be able to transfer in spray; when you arc is like a reverted umbrella with high voltage (>23V) and medium wire speed. That is also the downside of C25.
Reply:Originally Posted by Birken VogtJust got me a whole bunch of beverage bottles that had been laying around for years. I thought I would give them a try just to see how it works. My machine is an old Century 160A machine. Wire is .035 solid.The result with CO2 was less than satisfactory. What I got was the wire hitting the puddle then burning back and repeating itself. A lot of the time there was no arc at all so the total heat input was down somewhat. Beads on flat metal were tolerable but not great. I switched back to C25 with the same settings and the arc became stable and easy and it appears to me much more heat being laid down. I am running with the voltage maxed out and wire speed about 50% which is all the machine will do with C25 for the most part.It seems like the CO2 is not working as well as it should. I figured there would be more mess but there wasn't really, just an unstable arc. What should I be doing?Birken |
|
发表于 2021-9-1 00:14:06