The more I use this tool the happier I am with my purchase. Here is an example of reflow soldering a STM8S part which will naturally be running STM8eForth.
Before soldering I bump some solder on the pads, shown below. Note pins 2 and 7 have an "Ear" of solder which I removed with my soldering iron tip before placing the IC.
With a small amount of flux smeared over the pads I place the IC and then use the Ferrex tool as a hot air pencil to reflow the solder. Result before removing flux below:
The part has reflowed nicely and just needs the flux cleaned off. Something to do when I finish the rest of the board.
Even though the proper hot air gun is within easy reach I often reach for the Ferrex tool. It is cordless, has in practice no air flow to blow parts around and is easy to wield. But the results are the same.
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