Development of soldering iron head for soldering and tinning
1. The safety of electric soldering iron
Before using the electric soldering iron, first use a multimeter to measure the resistance at both ends of the power plug to judge whether the electric soldering iron can work normally. Normally, electricity
The resistance of the soldering iron is several thousand ohms before it can be used. There are two abnormal situations. If the resistance value is close to zero, there may be a short circuit inside. If the resistance value is close to infinity, the internal circuit is open. Soldering irons with abnormal conditions cannot be used. Secondly, use the highest resistance file to measure the resistance between the power plug and the tip of the soldering iron to determine whether the soldering iron has leakage. Under normal circumstances, the resistance value is above several megohms to infinity, otherwise it cannot be used. Finally observe the soldering iron
Check the wires for burns and damage, especially for exposed copper wires. Minor burns, no treatment required as long as there is no exposed copper wire If a conductor has exposed copper wire
, You can use insulating tape to restore insulation. If the two wires have exposed copper wires, they need to be separated to restore insulation, and then add a layer of insulation on the outside. Soldering irons with faulty wires cannot be used, otherwise.
Treatment of soldering iron tip before use
Treatment of soldering iron tip before use
Handling of the new soldering iron tip before first use The new soldering iron cannot be used immediately. Before using a new soldering iron, check whether the tip of the soldering iron is clean. If there is any dirt, clean it up with a clean wet sponge first. If it is serious, use fine sandpaper to remove the dirt on the tip of the soldering iron to make the tip bright and then turn it on and heat it until it can melt the solder. After dipping in rosin, touch it with the tip of the soldering iron for many times Solder wire, so that the tip of the soldering iron is evenly coated with a layer of tin. After this treatment, it is not only convenient for future welding, but also prevents the surface oxidation of the soldering iron tip
. Treatment of the old soldering iron tip before use After the electric soldering iron is used for a long time, a layer of oxide will be formed on the tip of the soldering iron, and the soldering iron will no longer be easy to eat tin. The way to deal with it is to remove the oxide layer with fine sandpaper or a file to expose the metallic luster. After heating, dip it in rosin for re-tinning or remove the oxide layer, then put the heated soldering iron head back and forth in the mixed material with rosin and solder Rub until the tip of the soldering iron tip is coated with a layer of tin.
