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Im running a lincoln 135 with 75%/25% and .025 wire that came with the lincoln mig. The wire speed seems to be just right after making a few passes at the "D" setting at 6. It make the nice almost hissing sound, but every few seconds the rod seems to try and suck up towards the gun. Its not arcing off like the wire speed is too slow, it balls up on the rod and I can see the gas almost turn into a fire. Im running my gas at about 8l/min, or about 20cfm. Im not sure if I should try running more gas, more speed, or thicker wire. Oh yeah, when trying to do over head it gets real bad to the point of not being able to get any penetration. It just balls up and then glops on there. Any tips?-Dallas J
Reply:Dallas J, welcome to the forum!! ........ Do you have your polarity correct? The welder may have been set up for flux-core wire and your running hard wire There should be a set of bus bars or some cables inside the lid, thats where you change it.Fluc-core uses a positive ground, hard wire your ground would be neg. Hope this helps and have fun here. Lots of good people. Pray for New Orleans.
Reply:I can double check the polarity, but Im pretty sure its set up DCEP. Everything came set up for the flux core wire (feed spool thing turned to its big side), and I just turned that around and swap the polarity. -Dallas J
Reply:Originally Posted by Dallas JI can double check the polarity, but Im pretty sure its set up DCEP. Everything came set up for the flux core wire (feed spool thing turned to its big side), and I just turned that around and swap the polarity. -Dallas J
Reply:Oh yeah, I did that too. As far as hardware, Im pretty sure all the stuff is in the right position. When its not trying to suck up, then it welds great. -Dallas J
Reply:sounds to me like the feed is a little slow. a hissing sound is a tale tale sign of slower wire speed. a bacon frying sound is better if you really have it dialed in you sould hear a cloth tearing sound. for overhead you do need to run a little slower but just a tad. It could also be a bad liner or to tight a tension on your feed rollers. .025 is pretty small wire and sometimes problematic with the cobra style mig guns. I have ran .023 a lot but with a spoolgun which feeds a lot smoother. The way I check tension. I hold the spool firm and backoff the rollers untill they slip while holding the spool then tighten the rollers untill while still holding the spool firm the wire starts to pull then give it a turn or two more. Does it run fine at first then after the gun gets hot you start burning tips or does it do it right off the bat?
Reply:It sounds like a feed problem to me. It sounds irregular, or intermittent. Maybee the smaller wire size from the roller is also styled for flux core? I know a flux core wheel even if the right size ,often doesn't feed solid very well. Tension might nead adjusting. Maybee not, but those are my first impressions. Take care, happy welding and welcome to the club Brian Lee Sparkeee24
Reply:The roller has 2 groves, I assume one for the .035 flux core wire and one for the .025 solid wire. It welds fine, then when it gets hot it does start to do it more. Ill try playing with a few things like spool tension, and maybe higher pressure gas. -Dallas J
Reply:do you have a reason for using the smaller wire? for example lite gauge metal. If not you may consider going up to .035 hard wire. you will have a lot less feed problems. try turning down some.
Reply:Originally Posted by Robby T.do you have a reason for using the smaller wire? for example lite gauge metal. If not you may consider going up to .035 hard wire. you will have a lot less feed problems. try turning down some.
Reply:well for the gauge metal your welding the .023 and .025 wire your using is what I would use but if you cannot get it to feed smooth then it may as well be barbed wire. you may try a spool of .035 and see if it helps. you are holding the lead pretty straight? no kinks? may try taking the liner out and pull a section of wire cut off from the spool thru the liner and see if you have a lot of drag. if so you need to replace it Are you located near Dallas? If so I may be able to help you with some parts but maybe not. I am in fort worth and am rigging out a trailer repair shop in Justin this week. I plan to post pics of the rig out later on. Anyway light wire is hard to feed the slightest bends in the lead seem to cause drag. Is this problem burning up your tips and you have to replace them every time? Are you using the same tip over and over? The key is to have a smooth feed. No drags or restrictions either in the tip or the liner or even the spool hub. if the hub that the spool turns on is hard to turn by hand then it may need to be loosened. this problem is not unique. I have had days that no matter what I tried I would burn a tip every few starts. It will drive you crazy. but you just have to troubleshoot it. it's not gas related you can cross that off the list. try checking all components in the feed system from the tip all the way back to the spool spindle. then try turning down your heat while leaving your wire speed the same. If none of this works I do not know. Let us know.
Reply:The wire doesnt feed all the way back to the gun, it just like pulls back from the weld like its on fire and melting. So the tip never gets touched. Its cheap wire, so Ill try just cutting it off back at the wire spool and see if it has any drag pulling it through. Thinking about it in common sense terms, the 2 things that would cause this in my mind are the weld area too hot for the wire, or the wire slowing down. The thing is though that it doesn act like the wire is feeding too slow, you know how it will arc back, then push out, then arc back. This just stays pulled back about .5mm from the weld puddle. The wire melts into a ball then finally pushes back down to the weld puddle. Its very weird. I wish I could get a video of it some how.-Dallas J
Reply:Dallas J,Why not try running .030" solid wire to see if that works for you. It's about all I use in my Weldpak 100 and my Miller MM-35. Maybe .035" would be a little too big for what you are welding, IMHO.Tony
Reply:Originally Posted by oldebrushDallas J,Why not try running .030" solid wire to see if that works for you. It's about all I use in my Weldpak 100 and my Miller MM-35. Maybe .035" would be a little too big for what you are welding, IMHO.Tony
Reply:After trying many different things I decided it would be good to go back and read my welding book from college. You know, the back to basics things. Wouldnt you know, it was something so simple and stupid and all my fault Aparently welding with 1"ish stickout causes issues. I couldnt tell how far out I was becuase of the gas cover thing. I pushed it up closer and things went great even in the overhead. Thanks for all the help guys. Any other problems I had you guys helped me fix -Dallas J
Reply:well congrats I too had a re-learning today. My silly gas lens for my mig gun had come half unscrewed, and so what I thought was breeze related, was actually from air getting sucked in, or inert gas being leaked out more likely... after tightening that back up, my porosity issues got cut WAAAAY back! I just can't wait for my new machine to get here, so I can run stick outside! WOO HOO! Brian Lee Sparkeee24 |
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发表于 2021-9-1 00:19:29