Temperature settings are pretty unique to each, not to mention that each station has it’s own ability (or not ;-) to deliver precise and constant temperatures. Despite that, there are some general guidelines most techs follow. The goal is to get the component to a temperature that allows the solder to flow. Some techs like to use a lower temperature and go slowly, others like to get it up to temp quickly. Ideally, you get just the component you want to flow and leave everything else just below that temperature.
Personally, I set my hot air station (Hakko) and Soldering Station (also Hakko) to 380C and eyeball it from there. I will lower the temp if I’m working on underfill, or lower melting point solders (iPhone X interposer). Don’t forget…lots of flux and keep an eye out for the surrounding components.
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