Steve, First thing I noticed was the components running up-down appeared OK. The components placed left-right were the ones skewing. Does this hold true across the entire board? I can't really offer an opinion as to what is happening here, just an observation. Mark -----Original Message----- From: Steve Gregory [mailto:[log in to unmask]] Sent: Tuesday, February 24, 2004 5:33 PM To: [log in to unmask] Subject: [TN] Skewed Components Hi All! Got a little issue here that I need to dig in deeper to, but I thought I'd post a picture on my web page and ask for your valued opinions. Was building a board today that we've built before, never had any problems with it. But today certain 0805 resistors started skewing on their pads during reflow, and I don't know why. Take a look at: http://www.stevezeva.homestead.com and look at "skewed components". It's not really a defect because they're 100% on the pads, and the wetting and fillets are fine too. They just look funky...and this just started happening. Not so much as a pimple on the boards before when we built them. As I said, there's more that I have to dig into, but thought maybe someone might have had this happen before, and can go; "A-ha Steve! you need to do this...." Also, I've posted a pretty awesome picture on my page. Take a look at "F-16 Exit". A photographer just happened to be at the right place, at the right time, with the right lense on his camera, the right F-stop, and everything in focus to take this picture...this truly is a once in a lifetime picture. The picture was taken from the tower at Mountain Home AFB in September last year at the air show they have there, the Thunderbirds were demonstrating. The aircraft was one of the two on the Thunderbird team that flies solo most of the show, the other 4 aircraft fly in formation. This aircraft had just done a high performance take-off straight-up, and then did a split S into a loop, and was just about to round out the loop at the bottom and pass show center, when the engine started spitting out turbine blades. There was no power to stop the huge rate of decent of the aircraft, so the pilot punched out at about 100-feet altitude, and the photographer snapped the picture. -Steve Gregory- --------------------------------------------------- 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 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- 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 847-509-9700 ext.5315 -----------------------------------------------------