Hello everyone, Its Friday yeeeeehawww! Kansas talk over here... I am setting my first Pb Free wave soldering line and I have some questions concerning acheiving an Optimum profile. I am using SAC305 at 509F (265C); I am using 2 IR heaters (for now until more demand for Pb products come around); I am using a foam fluxer with Kester 186-18RMA; Speedline Ultrafill nozzles (chip and laminar); all packaged in an old cerca 94 EPK Plus. I am currently in the certification stage where I am about to run the qualification vehicles that will be sent out for testing. Of course I need to make sure that all is well prior to soldering them, so I would like to get some feedback from the land of eternal knowledge. I have been shooting for a topside board temperature of 248F (120C) prior to hitting the wave and I have achieved this, but the results are not very good. The test vehicle are single sided with SMT and PTH components, and I thought I would achieve good solder formation on the leaded components. My question is what would be the maximum topside temperature I could use with degrading the substrate and solder joints. I have run the test boards at higher topside temps. (287F) and get good results, but I'm concerned that it may be too high. The flux is holding up very well duing the process, so this is not a problem and I believe that 509F solder bath temp. is a good start. Also, what should be the maximum board temp. delta during the solder wave? If any of you have anything to offer I would very much appreciate it. Thanks Guys and Gals Have a great weekend... Chris Schaefer Suntron Corporation Process Engineer 540 N. Rogers Road Olathe, Kansas 66062 913.393.5878 [log in to unmask] --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------