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Selective soldering: sprayed flux residues

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#52856

Selective soldering: sprayed flux residues | 11 December, 2007

Hi everybody,

Is there any criteria as far as No-clean flux residues surrounding solder joints when using selective solder machines? I have a Novastar SPA 400 and use flux NC kester 959. If I decrease the amount of flux, then I experience problems with poor solder fillet.

Any feedback is greatly appreciate it.

George

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#52872

Selective soldering: sprayed flux residues | 13 December, 2007

You may want to try raising your pre-heater if you have one. I would also suggest trying different fluxes that may be a little more active so you can use less. What type of fluxer are you using?

Selective solder flux residue is a gray area. This is one aspect of the process a lot of people over look. They expect selective soldering like reflow with no residue like wave.

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