Z axis expansion of the board material is a lot higher than x and y. Hand soldering heats the terminal but not the board (so much). Wave solder preheat really heats the board. This might cause measles because the swaged component puts the laminate under pressure. It might be different this time because of a number of variables, hole clearance, board thickness, swage pressure, swage speed, moisture content of the laminate . . . . -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Bloomquist, Ken Sent: Thursday, June 16, 2005 3:17 PM To: [log in to unmask] Subject: Re: [TN] Measling Conundrum Hi Steve and Ramon, I'll answer Ramon's question first; "Is this the first time that you run this board through the wave?" No, we've run them before and had much better results. We will give baking them a try. Steve, they are not pressed in hard at all. They are in hard enough to keep the perpendicular through the wave process but you can still turn them with your fingers after they are swaged. The holes are actually quite large, .191". KennyB --------------------------------------------------- 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 -----------------------------------------------------