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There are several differences between traditional and Wave Soldering Machines. Both are used to solder components. A Wave Soldering Machine uses a high pressure, asymmetrical wave. http://www.flason-smt.com/Wave-Soldering-Machine.html In traditional wave soldering, the lead is placed behind the component body. This process is a great way to prevent excess solder, as the leads can be easily placed behind each other. A Wave Soldering Machine can also be used to solder bare-metal components, although the high pressures used during the process will make it difficult to rework the part after soldering.The wave soldering process involves the assembly moving into the wave. The wave is designed to accommodate half the thickness of a PCB. The solder moves across the top of the wave at the same speed as the PCB, while the solder flowing over the rear baffle is separated from the assembly by a vertical divider. This way, the solder and PCB move at the same rate, and the wave is motionless.In wave soldering, the board is heated to 120 degrees Celsius or more. The board must be preheated to these temperatures before soldering can begin. Whether you are soldering a single-sided PCB, or an assembly with plated through-holes, the solder must reach the correct temperature to avoid freezing. The wave soldering process requires a certain amount of heat to prevent the solder from freezing.