Stephen,
In our HALS equipment this is daily routine.This daily treatment takes 3
hours.
We are running also solder analysis 3 times a month with very consistent
results.Apart of daily treatment solder composition corrections are very
rare.As you mentioned,from time to time we have to add some pure tin.
Edward
Edward Szpruch
Eltek , Manager of Process Engineering
P.O.Box 159 ; 49101 Petah Tikva Israel
Tel ++972 3 9395050 , Fax ++972 3 9309581
e-mail [log in to unmask]
> -----Original Message-----
> From: Stephen S. Schiera [SMTP:[log in to unmask]]
> Sent: в аевеси 14 2001 18:46
> To: [log in to unmask]
> Subject: Re: [TN] Solder analysis results
>
> You will want to take another sample after doing this. As you cool the
> pot
> the heavier metals (i.e. lead) will drop. When you remove the dross you
> will be removing tin also and could change the Sn/Pb ratio. You can buy
> pure tin to add back in to correct this.
>
> -----Original Message-----
> From: Edward Szpruch [mailto:[log in to unmask]]
> Sent: Tuesday, August 14, 2001 11:35 AM
> Subject: Re: Solder analysis results
>
>
> Phil,
> Copper content is 5.5 times higher that should be.
> Try to remove the excess copper by veeery slow cooling of your solder pot
> in
> static conditions.Around 190 centigrade you should get the first dross on
> the surface ,which is very rich in copper.Take it out.
> Good luck
> Edward
>
> Edward Szpruch
> Eltek , Manager of Process Engineering
> P.O.Box 159 ; 49101 Petah Tikva Israel
> Tel ++972 3 9395050 , Fax ++972 3 9309581
> e-mail [log in to unmask]
>
> > -----Original Message-----
> > From: Phil Nutting [SMTP:[log in to unmask]]
> > Sent: в аевеси 14 2001 14:48
> > To: [log in to unmask]
> > Subject: [TN] Solder analysis results
> >
> > Ok folks, here is today's question.
> >
> > I just received a Certificate of Analysis (our first one) for the solder
> > in our Soltec Waver Solder machine. All parameters are "within
> > specification" except the percentage of copper which is at 1.6859. (Tin
> > is at 61.3% and Lead is at 36.99% and other stuff is at 0.0199%) We run
> > 63/37 in the wave. We only solder our own product, none of which goes
> > into "mission critical" applications. We normally build our product to
> > IPC-A-610C, Class 2.
> >
> > My question is two-fold. Should I worry about this? If so, how do I
> > fix it with 1700 pounds of solder in the solder pot?
> >
> > Thanks is advance for sharing your knowledge.
> >
> > Phil Nutting
> > Manufacturing Engineer
> > Kaiser Systems, Inc.
> >
> >
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