What to do if the soldering iron does not stick to the solder
1. Gently scrape with a wallpaper knife and see a layer of white.
2. Plug in the power, dip it in rosin, and add soldering when it's hot. Be sure to eat more tin before dipping it in rosin.
3. When the electric soldering iron is not in use, it must have tin, otherwise it is easy to burn to death.
It is best to adjust the temperature of the electric soldering iron to around 280 degrees. Place the soldering iron head on a damp sponge or steel wire ball and wipe it repeatedly. After the soldering iron head is bright, be sure to apply tin protection and continuously apply new tin protection. Alternatively, turn off the power supply of the soldering iron, use a blade or fine sandpaper to polish off the dirt and oxides on the tin plated surface of the soldering iron head, then put the soldering iron head into rosin or rosin paste, turn on the power supply of the soldering iron, adjust the temperature to about 280 degrees, and let the soldering iron head heat up in the rosin. Then, use a soldering wire to tin the soldering iron head. After tinning, find a strand of copper wire or suction wire, and let the soldering iron head rub repeatedly on the copper wire until the soldering iron is full.
Electric soldering irons are divided into two types: externally heated and internally heated:
(1) The externally heated electric soldering iron consists of a soldering iron head, a soldering iron core, an outer shell, a wooden handle, a power lead, a plug, and other parts. Due to the installation of the soldering iron head inside the soldering iron core, it is called an externally heated electric soldering iron. The soldering iron core is a key component of an electric soldering iron. It is composed of parallel winding of electric heating wires on a hollow ceramic tube, with a mica sheet insulation in the middle, and two wires connected to a 220V AC power supply. There are many specifications for externally heated electric soldering irons, including 25W, 45W, 75W, 100W, etc. The higher the power, the higher the temperature of the soldering iron head.
(2) An internally heated electric soldering iron is composed of a handle, a connecting rod, a spring clip, a soldering iron core, and a soldering iron head. Due to the installation of the soldering iron core inside the soldering iron head, it generates heat quickly and has a high heat utilization rate, hence it is called an internally heated electric soldering iron. The commonly used specifications for internal heating electric soldering irons are 20W and 50W. Due to its high thermal efficiency, a 20W internal heating electric soldering iron is equivalent to around 40W external heating electric soldering iron. The rear end of the internally heated electric soldering iron is hollow, used to fit onto the connecting rod and fixed with a spring clip. When replacing the soldering iron head, the spring clip must be removed first, and at the same time, the front end of the soldering iron head must be clamped with pliers and slowly pulled out. Remember not to use too much force to avoid damaging the connecting rod.
