题目内容
The pick and place machines are pre-programmed with the information about component positions so that they know where to place the components. This program is normally developed directly from the printed circuit board design information.
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Soldering in the production of electronic equipment can take many forms. In the mass production of electronic equipment, automated techniques such as wave soldering, or reflow soldering are widely used. Meanwhile manual soldering is still used both in commercial and home environments.
Wave soldering is a process by which large printed circuit boards can be soldered quickly and reliably during PCB assembly.
The wave soldering process gains its name from the fact that the process passes the printed circuit boards to be soldered over a wave of solder (consists of a heated tank of solder). Wave soldering is usually used in PCB assembly for through hole mounted components.
Reflow soldering is the most common method of attaching surface mount technology ( SMT ) components to a printed circuit board. The goal of the reflow process is to heat and melt the solder, without overheating and damaging the electrical components.
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