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First time welders

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Bill E 190

12-08-1999 19:02:21




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When learning to weld with electrodes (stick welding) Set the welding amperage high about 100 welding amps when using 1/8 Dia. Rod.
This will help minimize the rod sticking to the work and make it easier to hold an arc, about 3/16 of an inch. Keep steady by bracing your welding hand with your free hand to the bench. While hold a steady arc start pushing the rod in toward the work at a steady rate of insertion. Make sure you keep the rod upright and when welding round surfaces you must keep the rod squared to the surface that means keep moving your hands in the direction of the surface. Rember start with high welding amps and lower as needed, hands steady, and push that rod in as fast as it will melt and things should work out fine. ( rember practice makes perfect )

lesson from Bill E190

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Al

12-09-1999 18:06:24




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 Re: First time welders in reply to Bill E 190, 12-08-1999 19:02:21  
Hi Bill: Thanks for the info. Knowing HOW to practice is a step ahead ! I'm thinking of buying a Lincoln 225 AC or should I pay the extra and get the AC/DC model? In general I plan to weld 1/8" to 1/4" however at a later date I may want to weld from 1/16 to 5/16". I think I read that DC is mostly for overhead welding ?



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Steve US Alloys

12-10-1999 06:26:56




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 Re: Re: First time welders in reply to Al, 12-09-1999 18:06:24  
Al,
If you only intend to weld steel and 5/16 is as thick as you intend to go, look at a small 130 amp wire welder. If you will weld sections heavier than 3/8", or think you will weld cast iron , stainless, and so on, the SMAW (stick)will be more practical. The difference between polarities is simply this. AC does not maintain a constant magnetic field, a common cause of arc wander in tight metal enclosures when welding with DC current. Also, AC puts equal amounts of heat into the rod and the work. On DC+ (DC reverse, DCEP, etc.) 1/3 of the heat is in the work and 2/3 in the electrode. On DC- (DC straight, DCEN, etc.) 2/3 heat is in the work and 1/3 in the electrode. Tip: Lean the electrode (for mild steel)at a 45* angle in the direction of travel. Stick welders penetrate when dragged. Drag on thick material and push on thin sections to avoid constant burn thru. As far as AC/DC welders are concerned, you have the polarity advantage mentioned earlier and you should know that aluminum stick runs only on DCEP. An AC/DC machine would allow some joining of aluminum. Not exactly the ideal situation but it works well on heavy sections of aluminum. With practice, you can also weld the thin aluminum if desired.

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