I think the melting point for a 60/40 leaded solder should be around 180-190 C, and for lead-free solder around 220 C. You might be thinking of Fahrenheit. In this case, the purpose of the preheater is not to reach the melting point of the solder, we would only want to reach the heat pre-soak temperature, then use the hot air gun to apply the rest of the heat. The hot air station is set to 340 C by the way, so that should be plenty of heat for the actual desoldering. But I do agree with you that the 100 C board temp may be too low. Some of the temperature profiles I've seen for lead-free uses a pre-soak temp of 130-180 C, so I will try raising that to 150 C next. Thanks for your comments!
100´C is not enough in my opinion, the whole card is designed to manage that temp
lead melting temp is around 320 °C, this one maybe around 200-250
I think the melting point for a 60/40 leaded solder should be around 180-190 C, and for lead-free solder around 220 C. You might be thinking of Fahrenheit. In this case, the purpose of the preheater is not to reach the melting point of the solder, we would only want to reach the heat pre-soak temperature, then use the hot air gun to apply the rest of the heat. The hot air station is set to 340 C by the way, so that should be plenty of heat for the actual desoldering.
But I do agree with you that the 100 C board temp may be too low. Some of the temperature profiles I've seen for lead-free uses a pre-soak temp of 130-180 C, so I will try raising that to 150 C next. Thanks for your comments!