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. > > > > > -------------------------------------------------------------------------- > > ------- > > Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > > To unsubscribe, send a message to [log in to unmask] with following text > in > > the BODY (NOT the subject field): SIGNOFF Technet > > To temporarily halt delivery of Technet send the following message: SET > > Technet NOMAIL > > Search previous postings at: www.ipc.org > On-Line Resources & Databases > > > > E-mail Archives > > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > > additional > > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > > ext.5315 > > > -------------------------------------------------------------------------- > > ------- > > -------------------------------------------------------------------------- > ------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt delivery of Technet send the following message: SET > Technet NOMAIL > Search previous postings at: www.ipc.org > On-Line Resources & Databases > > E-mail Archives > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > ext.5315 > -------------------------------------------------------------------------- > ------- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------