in-too-deep said: (quoted from post at 19:26:11 02/04/08) Been wanting to ask this for sometime now. I've got a Miller Thinderbolt 220V AC stick welder at work. It's harder than heck to strike up an arc. Once it gets rollin' I can weld all day, but if I stop, and instantly try to start again it just won't catch. I use 7018's and 6013's, and I even tried drying them real good in an oven and it didn't improve. Any ideas?
Run the Miller on the 'low' tap whenever you can as that gives you less amps but more OCV (OpenCircuitVoltage) which starts better with most rods.
If you can get your hands on a hi-frequency unit you'll be able to run lo-hy (7018) and such like you were using DC; all rod types start dead easy with the hi-frequency running over the welder's AC. I've seen the older MID-STATES units on eBay for $50-100; I've got one and they are a good unit. Once you get hi freq-ed you're pretty close to a TIG setup; all the extras you need for that is a bottle of argon, flowmeter and tig torch once you get the hi frequency unit. Here's my setup (the bottle and TIG torch aren't visible in the photo):
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