Hello, I'm new to the forum and need some help with a welding problem. I have a Millermatic 175 which is about 8 years old. I use my welder around my home for metal projects and repair. Self taught welder with the exception of some high school classes. At any rate, I have had a intermittent problem with porousity (sp). I cannot figure out what is going wrong. Metal is clean, indoor, no wind, argon/carbon dioxide, solid wire. 3/16ths to 1/4 in. steel. Metal clean. I have tried various amp and speed settings. Blew out the cable, checked the diffuser, tip, all clean. The weld does not sound right and looks like a weld done in the wind. But, inside and enclosed shop with no wind but a fan to extract the smoke. This has happened twice in the past and I checked and cleaned everything and afterwards the welds turned out good. Now, no matter what I have tried the welds are poor. Penetration is good, but they look terrible. So some questions. Can the argon/carbond dioxide get old and effcet the weld? ( I know, dumb question) How do I determine if I'm getting gas to the tip? Could this be the problem? Set at 20-25 CFH. I can't feel any air through the diffuser. Any help would be appreciated. Sorry for the long post I tried to give as much info as I could to help diagnose the problem. Thanks for the help.
No announcement yet.
Need some help