5 requirements for using a soldering iron
1. Preparation of a new soldering iron before use A new soldering iron cannot be used immediately. The tip must be processed before it can be used normally. That is to say, the tip must be coated with a layer of solder before use. The specific method is: first use a file to file the soldering iron tip into a certain shape as required, and then connect the power supply. When the temperature of the soldering iron tip rises to a temperature that can melt tin, apply rosin on the soldering iron tip, and then apply it after the rosin smokes. Apply a layer of solder, do this two to three times, so that an oxide layer will form on and around the blade surface of the soldering iron tip, which will make it difficult to "eat tin". At this time, you can file off the oxide layer and re-plat it. solder.
2. Adjust the length of the soldering iron tip. When welding integrated circuits and transistors, the temperature of the soldering iron tip should not be too high and the time should not be too long. At this time, the length of the soldering iron tip inserted into the soldering iron core can be appropriately adjusted to control The temperature of the soldering iron tip.
3. There are two types of soldering iron tips: straight and elbow. When using the pencil holding method, the soldering iron with a straight tip is more flexible to use. Suitable for welding in circuits with many components. A soldering iron with a curved tip is more suitable for use with a forward grip, and is mostly used for welding circuit boards when the circuit board is vertical to the desktop.
4. It is not easy to leave the soldering iron powered on for a long time without using it, because this will easily cause the soldering iron core to accelerate oxidation and burn out. At the same time, the soldering iron tip will be oxidized due to long-term heating, and may even be burned to death and no longer "eat tin".
5. When replacing the soldering iron core, be careful not to connect the leads incorrectly, because the electric soldering iron has three binding posts, one of which is grounded, and the other two are connected to the two leads of the soldering iron core (these two binding posts pass through the power cord and are directly connected to the ground). Connected to 220V AC power supply). If the 220V AC power cord is mistakenly connected to the grounding post, the soldering iron shell will be electrified and the parts to be welded will also be electrified, resulting in an electric shock accident.
