HI I m beginning.
Do you accept to help me?

000 I have couple questions in this short video. one of them is how why and when to use the metal shreds ball.

111 the picture , the store offer to choose 0.6, 0.8, 1.0 1.2mm. Those wire look bigger than 1mm by the way, what am i misunderstanding?. There is a lot of variation. I have to take into account that I will use soldering for some electronic in the future. So which diameter is too big to solder electronic? Would be my question.

222I understand that the 2 wires will be kind of holding togehter by being twisted One is much bigger than the other. I understand that i have to heat the big wire. But until when or what. Also what is the material that will make the tin melt? will it melt because it is touching the copper now so hot? or do i have the tin melt by depositing it on the tip of the iron and then sort of painting it onto the copper twist?

333 About the resin inside the core of the tin wire. Is it dangerous , will it burn chemically my skin if i touch the end of the tin wire? At the end of the job, do i have to do something with the tin wire to prevent rosin from leaking or drying like maybe curving it in a tight U?
Is it better for me to cover the tip of the iron with tin-rosin before i store it?

I know , lots of questions, more than 3 lol, thanks

 

one of them is how why and when to use the metal shreds ball.

It's used for cleaning the tip. I prefer to use a damp sponge.

So which diameter is too big to solder electronic?

It depends on what you're soldering.

I use 0.032" (0.8mm) for most soldering. When I need smaller amounts of solder, I use 0.015 (0.4mm). When I need a lot of solder, like when I'm cleaning oxidation from the iron tip, I double up and twist 0.032" solder.

I understand that i have to heat the big wire. But until when or what.

Both wires have to be touching, but not necessarily twisted, and you heat both of them until they're hot enough to melt the solder. It helps to have a small blob of solder on the iron tip to facilitate heat transfer.

About the resin inside the core of the tin wire. Is it dangerous

It's not overly dangerous. Just don't put it in your mouth and wash your hands after handling the solder (particularly if it has lead in it).

The picture is for 100g of 60/40 rosin core solder for $15.99. That's pretty expensive for some Chinese no-name brand. I have 1-pound rolls of Alphametals 63/37 0.032" (0.8mm) solder for barter in this thread. I'd sell outright for about half the per ounce Amazon price, but you need to take a pound and you'd need to pay for shipping (assuming you're in the U.S.).

63/37 solder is generally better than 60/40 because it's eutectic and less likely to make cold solder joints.

 

I aslo have a tin of flux on the bench when doing circuit soldering, If using a printed CCT or perf board etc, give it a good polish with soft loth to remeve any tarnish, however slight.
Use Isopropyl alcohol and a lint-free cloth, If you use 70% Rubbing Alcohol, ensure you dry it thorouly afterwards.

 

There are some good YouTube videos on soldering for beginners.

 

Hello,

Eevblog has some videos on soldering:
https://m.youtube.com/playlist?list=PL2862BF3631A5C1AA

Bertus

 

It's used for cleaning the tip. I prefer to use a damp sponge.

Some years ago an engineer from Ersa (a big german manufacturer of solder stations, professional rework stations and reflow machines for SMD) told me not to use a damp sponge because this means thermal stress for the solder tip which can lead to hairline cracks in the solder tip. The metal shreds ball is much better because this is less thermal stress for the solder tip when cleaning it.