I have experimented with solder wave temperature in an effort to reduce
dross and maintainance. But discovered that lower temperatures also
(with our flux) reduced solder bridges and yielded brighter joints. Too
cool caused reduces vertical fill. I found that in our process, with
most boards the best results were around 250C. Little was gained by
increasing the temp to 250 but it did increase the amound of dross
formed. Going higher increased dross increased bridging, and produced
solder peaks on some components.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Morse, Carrie
> Sent: Friday, January 10, 2003 3:15 PM
> To: [log in to unmask]
> Subject: [TN] Wave Temperature
>
>
> As I sit here on a Friday afternoon with little time to start
> thinking about questions that would be great for a "PCB
> Assembly Trivial Pursuit" game, I thought of something.
>
> At what temperature does everyone run their Sn63Pb37 wave
> machine....and Why?
>
> We run ours at 260C, but, don't know why.  We started to get
> into the discussion as to why, and, some of the reasons were:
> 1) That's what was recommended, 2)It's hot enough to burn off
> the flux, 3)It reduces surface tension.
>
> Can someone enlighten us?
>
> Thanks,
> Carrie
>
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