1. How to use the electric soldering iron
The reverse grip method is to use five fingers to hold the handle of the soldering iron in the palm. This method is suitable for high-power electric soldering irons, and welding parts with large heat dissipation. In the positive grip method, the electric soldering iron used in this method is also relatively large, and the tip of the soldering iron is shaped. Pen-holding method, this method is suitable for low-power electric soldering iron, welding parts with small heat dissipation, such as welding radio, TV printed circuit boards and their maintenance.
Second, the specific steps of using the electric soldering iron
Preheating: The tip of the soldering iron is at a 45-degree angle, against the pad and the component feet. Preheat component pins and pads. The tip of the soldering iron tip should not stand against the copper-free position of the PCB board, which may burn the board into a trace; the soldering iron tip should preferably follow the direction of the line: the soldering iron tip should not plug the via hole: the preheating time is 1 to 2 seconds.
Tinning: Introduce the tin wire from the contact surface of the component foot and the soldering iron; when the tin wire is melted, master the wire feeding speed; when the tin is scattered over the entire pad, open the tin wire; Prevent the flux from burning black; the entire tinning time is about 1 to 2 seconds.
Open tin wire: snoring tin wire, the furnace continues on the pad; the time is about 1 to 2 seconds.
Remove the soldering iron: When only a slight smoke of the solder comes out, turn off the soldering iron: the solder joints are solidified.
