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Old 03-17-2008, 07:34 PM   #1
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Wire soldering


Im trying to solder two wires together and just bought new pen iron because i broke tip to other same wattage but the new when i touch tip to coat with solder solder burns right off like its to hot that didnt happen to old one .so is it because its new or is the solder to thin.

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Old 03-17-2008, 08:25 PM   #2
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Wire soldering


Let the soldering iron get as hot as it can. Dip the tip in the flux and let it melt some flux all over the tip. Then clean it off with a damp paper towel. Then stick the tip in the flux, and melt it on the tip. Then put solder on the tip, and it will melt over the whole tip. Wipe off the tip, and then put just a dab of solder on the tip, and go ahead and solder. Be sure to put flux on the wires you are soldering. I am a certified micro/miniature, and flat pack soldering tech. You need to put a small amount of flux on the wires. Flux core solder is junk. With a small amount of flux on the wires, and a dab of solder on the iron you will get a good hot joint. The small dab of molten solder on the tip transfers the heat faster, and more evenly.


Last edited by RobertS; 03-18-2008 at 07:50 AM.
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Old 03-17-2008, 09:02 PM   #3
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Wire soldering


It's known as 'tinning' the iron.

As stated above, the reason it doesn't stick is because there's no flux. Flux cleans the metal of all impurities so the solder can penetrate it. Without flux the impurities will form a barrier between the solder and the metal, and it won't stick.

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Old 03-17-2008, 10:50 PM   #4
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Wire soldering


Like RobertS said, plus heat the wires with the soldering iron instead of just trying to glob solder all over them. This will result in a cold joint prone to failure.

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Old 03-18-2008, 07:47 PM   #5
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Wire soldering


where does the flux come in at because what i did is i found the broke piece to my old iron and put it in the new iron and solder sticks fine.
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Old 03-19-2008, 10:06 AM   #6
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Wire soldering


The new tip needs to be tinned. Don't get it too hot or it will burn. As it heats up keep trying to add solder to the tip. As soon as the solder starts to melt it should stick to the tip. Clean the new tip well.

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