Joe, >> The pre-heating trick actually makes the big soldering iron rest most of > >> the time... >> >> We have boards with so much ground/power grids that it is really a >> headache to do without pre-heating, which is similar to the iron case >> soldering problem. >> >> So, doing it this way makes it go fast. > > I think we are talking about different things. For getting chips off a > big multilayer board, preheat plus hot air is a standard way to go, but we > are talking about how to unsolder a steel can with foam insulation within. > Slow heating to near soldering temperature is likely to yield a heap of > goo.
Actually no, the physics behind it does not really change and he also did unsolder the endcap of a steel can for me in this fashion. No goo inside as a result. Worked very well. I expect to be able to use it once I am done inside. > The point of the torch method is to heat the can's solder seam up *fast*, > so the solder melts before the foam. Sure. But pre-heating and hot-air works too. Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
