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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Checking welding current
On Sat, 29 Mar 2008 00:29:57 -0600, "SteveB"
wrote: I'm picking up the radiator for the SA 200 Monday, and will be painting and reassembling according to the wind speed over the next couple of weeks. When I get the old gal running, I'd like to do a check on the output through the leads. Would I do this with a helper and an amp clamp? Set it up to weld, and then weld with a helper watching an amp clamp on the lead? Is there another type of tester I should use just on the main lugs off the machine? I'm just trying to see if the output is good, and is within the range of the controls indicate. I will be using 50' leads of #1 cable on each leg. I will be using 7018 1/8" rod in the flat position, and making a dime size pool, and trying to burn thirty seconds per setting. Stinger positive. Does this sound like a plausible idea? Other suggestions, caveats, tips, procedures or whatever appreciated. Thanks. Steve Your 50 feet of #1 copper lead would have a resistance of about .0063 ohms, so it will display a drop of 6.3 millivolts per amp. Use a voltmeter on a low-volts scale to measure the voltage from end to end of the 50 ft cable while welding. Amps will be volts / .0063 or volts * 159. |
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