Thanks for the support of the linearing idea. I had a feeling that this could help. You make me think of placeing the connector on the boards before HASL. Hmmm...what will happen in the wave soldering of the boards later? You started the machinery in my old, gaggy brain....what about applying a solder mask right over? Is it realistic with that fine pitch? Will the solder ignore the solder mask and bridge? /Inge ----- Original Message ----- From: "Thayer, Wayne" <[log in to unmask]> To: "TechNet E-Mail Forum" <[log in to unmask]>; "Inge" <[log in to unmask]> Sent: Thursday, October 09, 2008 10:19 AM Subject: RE: [TN] Need soldering advice ASAP No II Killing the protrusion should linearly improve the process. If you have cut them to negligible protrusion and still have trouble, then you are stuck with flux/temperature/time games, or some kind of hot air blow-off like out of the HASL machine. Wayne -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Sent: Thursday, October 09, 2008 12:31 PM To: [log in to unmask] Subject: Re: [TN] Need soldering advice ASAP No II Also need advice concerning soldering of a 120 pin, three row, right angle, through hole edge connector. The pitch is 1 mm, and the through hole copper collar is such, that the space between them is just a fraction of a millimeter. We tried to use our selective soldering machine, but whatever we do, the SnPb overbridges all the pins! I'm not surprised, because the solder surface tension will not allow the solder to withdraw pin by pin. However, such connectors are made and sold plenty of, so they must be solderable, question is with what. The selective soldering machine's 'wave pot' is 10 mm across and the minimum wave top is 3 mm. Does it help to cut the pins so that they are even with the board ? Today, the pins protrude 0.3 mms . Anyone who knows nothing? /Inge PS. Will send a photo to Dr Gregory. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 ----------------------------------------------------- This e-mail and any files transmitted with it may be proprietary and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the sender. Please note that any views or opinions presented in this e-mail are solely those of the author and do not necessarily represent those of ITT Corporation. The recipient should check this e-mail and any attachments for the presence of viruses. ITT accepts no liability for any damage caused by any virus transmitted by this e-mail. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 -----------------------------------------------------