Posted by jon f mn on November 30, 2012 at 02:41:27 from (22.214.171.124):
Had a discussion about putting a wiper with some oil on it on the wire before the feed rolls on a wire welder yesterday. I thought it was important to keep the dust and dirt from getting into the liner and causing trouble. Some of the production and code welders objected saying that it could contaminate the weld. I agree for code work that would be an issue. Also for production work and in shops where several rolls of wire are used every week it's probly not necessary either. However, most of us are farmers and hobbyists and our welders sit in the garage or shop, maybe for several years with the same roll of wire in them. That allows a lot of time for dust, dirt, and rust to collect on the wire, so I think some type of wiper is important for us. I've used a couple of drops of oil on a felt cloth for all my career and never had any problems with it. But I had a couple of ideas for those that want a wiper, but are still concerned about contamination. The first suggestion is to use nozzle spray, it stays sticky for a long time so should attract dust and dirt, and since it's sprayed on the nozzle and on the material to keep spatter off contamination should not be an issue. I also thought that maybe some furniture duster spray like Enddust or Pledge would also work good. All you need is something that attracts dust and dirt. I just don't think a dry sponge or pad is good enough in those conditions.
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