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post #1 of 42 Old 05-23-2006, 6:57 PM Thread Starter
 
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soldering VERY fine wires???

OK I tore the sheep cam down and it is worse than thought. The wires are cut in two place and the 3 wires are very tiny. Any tips from techs on how to make a decent splice? I hate to have to get another cam just because of the wire

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post #2 of 42 Old 05-23-2006, 7:00 PM
 
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Re: soldering VERY fine wires???

Get some solder paste instead of solder wire. Sometimes I'll just use hot air rather than an iron if the application calls for it.

A nice fine tip on your iron, and a good magnifying glass to work with.

What exactly are you trying to do?

As far as the splice, make sure they're mechanically unstressed when the wires are together. Either by bending/forming, or using some type of clamp or glue.



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post #3 of 42 Old 05-23-2006, 7:29 PM
 
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Re: soldering VERY fine wires???

If you really want to do it right, you'll need an adjustable temp controlled rig, 28 guage or smaller silver tip, rosin dip, magnifying glass, nitrogen froster and 20/20/20/40 non ferrous solder (silver/relief grade gold/cadmium/brass).

A few decades of experience will come in handy as well . . .

You could also vapor rephase the connection if you tin the leads with silver/cadmium first.
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post #4 of 42 Old 05-23-2006, 7:34 PM
 
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Re: soldering VERY fine wires???

Get some really fine solder?
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post #5 of 42 Old 05-23-2006, 7:37 PM
 
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Re: soldering VERY fine wires???

Quote:
Originally Posted by abtech
If you really want to do it right, you'll need an adjustable temp controlled rig, 28 guage or smaller silver tip, rosin dip, magnifying glass, nitrogen froster and 20/20/20/40 non ferrous solder (silver/relief grade gold/cadmium/brass).

A few decades of experience will come in handy as well . . .

You could also vapor rephase the connection if you tin the leads with silver/cadmium first.
Hey sheep, didja get that?

You'll definately like the N2.

BTW, if you're trying to solder flex circuits back together...that is a tough job. The pure copper doesn't wet and the heat will kill the substrate in short order. Not an easy task, but doable.



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post #6 of 42 Old 05-23-2006, 8:03 PM Thread Starter
 
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Re: soldering VERY fine wires???

Quote:
Originally Posted by luvtolean
Hey sheep, didja get that?

You'll definately like the N2.

BTW, if you're trying to solder flex circuits back together...that is a tough job. The pure copper doesn't wet and the heat will kill the substrate in short order. Not an easy task, but doable.
Sounded a like like dorper for "get a new cam"

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post #7 of 42 Old 05-23-2006, 8:08 PM
 
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Re: soldering VERY fine wires???



Get a fine tip, some fine wire (I'd recommend plain old eutectic tin-lead 63/37 rosin core because it melts at a fairly low temp, 183ºC), turn the heat down (a geek like you surely has an adjustable soldering iron of quality, like a Weller) and try it. You might also want to daub on some flux, and make sure the surface is very clean.

I don't know the melting point of Abtech's fancy alloy, but lower is better for your application.

There are also much lower melting point solders made with bizmuth, indium and such, but I probably wouldn't try those.



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post #8 of 42 Old 05-23-2006, 8:10 PM Thread Starter
 
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Re: soldering VERY fine wires???

Here is the wire. I need to splice two together to fix the cable. The other end is on the cam and the stub is about 3/4" inch long

Also here is the Helmet Cam after being crashed on. Really are tough, except the cable.
Attached Thumbnails
IMG_1646.jpg‎   IMG_1653.jpg‎  

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post #9 of 42 Old 05-23-2006, 8:10 PM
 
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Re: soldering VERY fine wires???

Quote:
Originally Posted by sheepofblue
Sounded a like like dorper for "get a new cam"
I wager my soldering rig and associated tools cost about the same as about 200 of those cameras. Maybe that's what I was getting at.

If the need arises, I can book you some time on the pick and place down the road in case you need to do any quick production prototyping for your data collection stuff . I think one-offs run about 5500.00 per hour with a 20 hour minimum . . .
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post #10 of 42 Old 05-23-2006, 8:11 PM
 
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Re: soldering VERY fine wires???

Aw dude, that is cake.

Hell, you could do that with a torch and your teeth to strip the wire. I thought you had a hard one.

Whatever iron you have and some rosin core solder will be fine. Don't forget to put the heat shrink on before you solder.



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post #11 of 42 Old 05-23-2006, 8:29 PM
 
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Re: soldering VERY fine wires???

I thought you said "really fine" wires. Really fine starts around 40 awg and goes to 66 awg and then you get into the micro fine range . . .

That looks around 22 awg and they're even tinned strands . . .
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post #12 of 42 Old 05-23-2006, 8:32 PM
 
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Re: soldering VERY fine wires???

Yep, call us solder geeks when you're messing with bondwires or something.

Sheep, a EE such as yourself asking about this? You work in a union shop or something?



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post #13 of 42 Old 05-23-2006, 8:34 PM
 
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Re: soldering VERY fine wires???

If you can get the cam open it would be easier, better and stronger to solder to the original connection instead of spicing the wires.
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post #14 of 42 Old 05-23-2006, 8:36 PM
 
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Re: soldering VERY fine wires???

Quote:
Originally Posted by abtech
If the need arises, I can book you some time on the pick and place down the road in case you need to do any quick production prototyping for your data collection stuff . I think one-offs run about 5500.00 per hour with a 20 hour minimum . . .
You have a pick and place machine...really?

Here's the one I bought a couple years back. I'll underbid abtech by 20%/hr Sheeply, 1 hour min.



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post #15 of 42 Old 05-23-2006, 8:40 PM
 
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Re: soldering VERY fine wires???

PNY has a UVHDC (up to 2400 flat, 3100 @ 30 degree) production line about 1 mile down the road. They also have a 12 layer wave setup that I have used a couple of times. No PnP here . . .
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