Why can't I solder correctly?

Slickone

Diamond Member
Dec 31, 1999
6,120
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I've tried to solder numerous times, and get so frustrated that I can't do it correctly. I know you're supposed to heat the component, and touch the solder to the component and it should flow onto the component, but most of the time I have to actually touch the solder to the iron tip. Why? I have managed to do it correcetly when soldering two wires together, but that's it, and I can't always do them correctly. If I try to heat up the component, it gets so hot that it will melt and/or just get damaged, but the solder still won't melt. I don't have the solder here with me to tell the specs, but it is rosin core, in a tube, and isn't very thin. Got it from MCM a few years ago. I know you probably need the specs; will get tonight.

I have this radio shack 15/30 watt iron.
How do I know when to use 15 and when to use 30?
The tip is a little loose, no matter how tight the screw is.
The iron is too long. ie. the tip is too far away from the handle for me to be precise. Imagine trying to use a 10 foot rod to try to hit a small mark on the wall, or to write your name.
I know I probably should get a better iron. Any recommendations, maybe $50-$75ish?

Another thing that's difficult is trying to hold the iron, solder, and component all at the same time.
 

mchammer187

Diamond Member
Nov 26, 2000
9,114
0
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flux

you can't solder without it

also when you are soldering wires it is best to tin them first

put flux on the wire

put solder on a point away from the tip of the iron and just hold the wire so it points forward

hold the iron so it points way to the left (if you are right handed) and just run the wire over the iron

where the solder is and coat it with a very thin layer of solder
 

jcovercash

Diamond Member
Apr 24, 2001
9,064
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0
First off a better iron will help, but if your using really large solder it will take alot of direct heat to melt it sometimes.....

I use .015 for my Xbox mods and it melts right to the wires when I touch it. I have a weller soldering iron.
 

edro

Lifer
Apr 5, 2002
24,326
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I use this one.

It's tough to find replacement tips (I got them through Mouser.com). It works well for everything that I do. (XBOX and minor electronic repairs/projects)

The tip that comes with it is kind of fat for small electronics (I bought the smaller narrow tips).

It is variable and you can replace the iron if you want.

 

woowoo

Platinum Member
Feb 17, 2003
2,092
1
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Panavise
(Real mans vise)

It's ok to get a little solder on the iron first.
It helps conduct heat to the component being solderd.

You use 30w setting when the 15w setting is not doing the job
 

Modeps

Lifer
Oct 24, 2000
17,254
44
91
Quick tip from the Modeps school of Solder (concerning soldering wires)

1) Allow Iron to get nice and hot.
2) Put a small amount of solder on the tip.
3) Place iron underneath wire, heating the wire itself.
4) Lightly 'paint' the wire with solder, not touching the iron itself.
5) Dont forget to shake! (a quick shake of the iron will clean it nicely for next use, a quick shake of the wire will remove excess solder and leave you with a nicely soldered wire.)



(edited to close my parens! :D)

 

hevnsnt

Lifer
Mar 18, 2000
10,868
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Originally posted by: ElFenix
more watts, smaller tip, thinner solder.

and get this

For electronics, never go over 30w!!!!! Infact I would recommend any beginner to use 15w, 30 can damage your boards in a second.

And the "helping hands" posted above helps a lot!
 

jcovercash

Diamond Member
Apr 24, 2001
9,064
0
0
Originally posted by: mchammer187
flux

you can't solder without it

Yes you can. I never use flux. Some wires are coated with sometime over the actual wire and you may need to scrap that off with a knife/razor before the solder can adhere to it well.

You have to be careful if you use flux however because it is acid based, Rosin-flux is based off a an organic acid if I remember correctly and should not harm the electornic circuits.
 

Slickone

Diamond Member
Dec 31, 1999
6,120
0
0
It was told before that I didn't need flux.

How does getting solder on the tip help conduct heat? And how can solder stay on the tip without melting off? The thing is, that's the only way I can do it, is by touching the solder to the tip.

ElFenix, I have that 3rd hand.

Modeps...shake? I dont follow.
 

CPA

Elite Member
Nov 19, 2001
30,322
4
0
Just try soldering copper tubing to a coupling using propane. Talk about a pain in the a$$.
 

Modeps

Lifer
Oct 24, 2000
17,254
44
91
Originally posted by: Slickone
Modeps...shake? I dont follow.

Just a shake... shake it off! One quick shake with a bit of force should do it for both the iron and the wires... you could even tap the iron against something if you want to make sure it's nice and clean for the next go'round.


PS: You may want to have a cardboard box or something so to catch the flying solder, or you'll have to get it off the floor ;)
 

Modeps

Lifer
Oct 24, 2000
17,254
44
91
Originally posted by: Slickone
Is the Weller WLC100 a good medium cost iron?

Should I get a desolder tool?

What gague is the wire you're trying to solder? You shouldnt really need to buy an expensive iron for it... It's just a hot piece of iron... It takes practice, just work at it.
 

Slickone

Diamond Member
Dec 31, 1999
6,120
0
0
For one thing, this is the 2nd iron I've had and the tips wouldn't tighten up on either. I figured a better one wouldn't have that problem. I'm not soldering wire at this time, but small bulbs to a PCB (backside).

Also is the Panavise 301 a good one to get?

I guess ebay is the cheapest place to get either of these?
 

Eli

Super Moderator | Elite Member
Oct 9, 1999
50,419
8
81
Make sure your tip is tinned. You don't need flux if you have rosin core solder.

The solder will flow to where the heat is. Just keep practicing.
 

beer

Lifer
Jun 27, 2000
11,169
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I'm a third year EE and i have never touched a soldering iron

However, I can build an amplifier. Go figure
 

Analog

Lifer
Jan 7, 2002
12,755
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0
Practice, practice. I use a metcal, and I've been soldering for over 25 years.
 

sharkeeper

Lifer
Jan 13, 2001
10,886
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Just try soldering copper tubing to a coupling using propane. Talk about a pain in the a$$.

Piece o' cake! :)

What's tough is repairing a 2" condensate drain (copper) line and all you have is an oxyacetylene torch and bronze (1950F MP) rods and flux powder. Not enough heat and the rod doesn't budge...too much heat = big hole in pipe! Very tricky and I managed a nice bead around the socket (no typical "laid over dimes look" however) but at least the bitch held!



More info for OP

Cheers!