I was taught to heat the joint and apply the solder to the hot joint from the wire. It's to do with an alloying process and creates a good electrical joint. This creates a decent electrical joint as the solder creates an alloy with the component leads at the surface. The method you described will create poor joints, both electrically and mechanically. There is a hell of a lot more to it than that, but this sticks in my mind as my lecturer at university told us this in February.
My procedure is to take a drop of soldering wire with the soldering iron and put it where I need it.
Thanks zapro and tomgeorge, I'll read your tips.But still, If I'll preheat things they will get damaged.Just to clarifyThe thing that do the smoke when I touch the solder is some kind of "glue" that should allow the solder wire to connect better ?
When I take an LED and put a drop of hot soldering wire on one of the led legs, he heats up instantaneously. he heats up so fast, that when i soldered 64 leds, I've destroyed 8 from over heating.So preheating the leg of the LED will definitely kill it.
If preheating stuff for that 0.5 second destroys the, then your soldering iron is not suitable for the job. Post a picture of ALL your soldering equipment that you are (trying) to use.The stuff that make the smoke is called FLUX - It chemically cleans the surfaces so the solder can stick. Without flux you will have crappy joints.// Per.
You wrote : "While holding soldering iron in position, count to 5." unless you believe my counting speed is 0.1s per digit I don't see how this suggestion is 0.5 second
I just have a simple soldering iron with temperature control and a solder wire.My procedure is to take a drop of soldering wire with the soldering iron and put it where I need it.Is that specific enough ?
3- What ? no solder paste to tin the tip ?
My god,, you never heard of tinning the tip with solder paste ?
No. I tin it with standard leaded solder.I see no reason to use solder paste for that use. It's way more expensive, and melting it on the tip of the iron has no advantage over standard solder.