It's hard to work on this old machine because I have no information on it and no schematic to show me around. Requests on websites with forums of tinkerers and even a call out to the manufacturer provided nothing of assistance. But I wake up one morning to find an email from Canada where someone on one of the sites not only sent me a scan of old documents, he also kept looking around for other information, which is a tall order considering we're talking about a machine 50 years old that even the manufacturer has no records for.
All I needed to do was flash the exciter windings and that would re-magnetize the iron core and then the welder would crank up plenty of voltage. I'll spare you the tech details, but I kept insisting that this welder--basically a big DC generator--was self-exciting and had no separate windings. This guy kept saying that there must be an exciter and kept sending me more scans. Finally, I realized that I was wrong. Had I had my eyes open--well, really my brain open--I would have had this thing fixed right away. In reality, had it not been for someone else seeing things clearly, I'd still be staring at a welder that just makes a lot of noise but no spark.
How often do we close ourselves off from solutions or possibilities in life due to assumptions that we make and protect?