Does anyone want to do a how-to on soldering? - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 16 (permalink) Old 08-02-2006, 11:07 PM Thread Starter
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I've been looking at soldering the wires on my CP-e and I really would like to learn the correct methods of soldering 2 wires together in a secure manner. Most of the time when I try it, the solder just seems to bead up on the surface of the wires, not making a very clean joint. From what I've read online you need to heat the wires and the solder evenly, but how do I do this without melting the wire jacket?
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post #2 of 16 (permalink) Old 08-02-2006, 11:12 PM
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http://www.epemag.wimborne.co.uk/solderfaq.htm

Site I have used in the past...

Here's a summary of how to make the perfect solder joint.
All parts must be clean and free from dirt and grease.
Try to secure the work firmly.
"Tin" the iron tip with a small amount of solder. Do this immediately, with new tips being used for the first time.
Clean the tip of the hot soldering iron on a damp sponge.
Many people then add a tiny amount of fresh solder to the cleansed tip.
Heat all parts of the joint with the iron for under a second or so.
Continue heating, then apply sufficient solder only, to form an adequate joint.
Remove and return the iron safely to its stand.
It only takes two or three seconds at most, to solder the average p.c.b. joint.
Do not move parts until the solder has cooled.


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post #3 of 16 (permalink) Old 08-03-2006, 09:08 AM
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Unfortunately, it appears all the soldering sites talk about circuit boards or plumbing versus wires. I don't care about pipes and circuit boards.

Is there one that discusses wires in detail?

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post #4 of 16 (permalink) Old 08-04-2006, 10:31 PM
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what i do is i just twist the wires together to hold it in place, drop some flux on there, then heat the wires a bit with the soldering iron. when it's hot enough then start soldering. the flux helps ALOT in bonding the wires. if you don't have flux, then try working the soldering into the wires. hope this kinda helped...
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post #5 of 16 (permalink) Old 08-05-2006, 07:01 PM Thread Starter
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I'm trying to use flux core wire... is that my problem?

P.S. is there a correct method of stripping a middle section of wire without cutting the wire?
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post #6 of 16 (permalink) Old 08-07-2006, 12:42 AM
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To make the strongest joint possible you must press the solder to the contact (wires) when they get hot enough and not to the soldering pencil or gun whichever you are using. When you melt the solder on the soldering pencil and then put it on your contact then you creat what is called a cold solder and these are very weak and break very easy and do not creat a very good connection.
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post #7 of 16 (permalink) Old 08-08-2006, 08:48 AM
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Quote:
I'm trying to use flux core wire... is that my problem?

P.S. is there a correct method of stripping a middle section of wire without cutting the wire?
[/b]
Nope. Flux core will have the same affect as adding flux before hand. Just make sure to heat the joint, NOT the solder, giving the joint enough time to heat up (but not toooo much) and "draw" the solder in. When done correctly, the joint should draw the solder into itself, like a paper towel soaking up water...

As for stripping, you can do it old-school with a sharp knife, or use a crimping/stripping tool.
Nice fancy one from Klein: http://www.kleintools.com/

It's also a good idea to practice! Get some scrap wire and try it a few dozen times before soldering the $$$ CPU in your '6.

Good luck!

PS - don't forget the shrink wrap goes on BEFORE soldering!


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post #8 of 16 (permalink) Old 08-08-2006, 05:15 PM
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Shrink wrap?

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post #9 of 16 (permalink) Old 08-09-2006, 07:17 AM
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A.K.A shrink tube

Have a lookie: http://cableorganizer.com/heat-shrink/

If you've never used it before - it's a polyurethane tube that shrinks when heated. It comes in different colours, diameters and shrink ratios. A 2:1 ratio tube will shrink to half it's original size when heated, 3:1 shrinks 66%, etc etc.

Use it instead of electrical tape to cover the solder joint once you're done. It will keep the joints from shorting each other out. It's typically used when splicing two wires together, so I'm not sure if it's applicable for the ECU soldering that you'll be doing.


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post #10 of 16 (permalink) Old 08-09-2006, 03:43 PM
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I guess I don't see how it would be possible to put that on and then solder. I think I'll just stick with tape.

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