Genny: Use a connector instead of soldering the wires to the board. The connectors will take the stress off the cable. Regards, Ramon > -----Original Message----- > From: Genny Gibbard [SMTP:[log in to unmask]] > Sent: Friday, April 11, 2003 1:21 PM > To: [log in to unmask] > Subject: [TN] wire assembly suggestions > > We have a midplane made of four interconnecting boards, involving time > consuming detailed hand assembly to put together. Part of the interface > of this board to other parts of the system is a terminal housing of 12 > wires, 7 going to one midplane board and 5 going to another. The wires > are about 2" long, soldered on the PCB end, crimp terminals on the housing > end. Originally a 26 ga ribbon cable piece was used, but they wanted > higher current carrying capability, so went to a 22ga ribbon cable. The > ribbon cable is so stiff, that one prototype assembler suggested going to > 24ga teflon coated stranded wire. The first few prototypes went fine and > have exhibited no problems, but then it moved into production to finish > off the proto build and give them experience with the assembly. Now it > seems like on every assembly they are complaining some of the wires from > the terminal housing are breaking off at the PCB. > The terminal housing sits very close to the midplane assembly, once > mounted in the chassis, and there is very little positional movement once > it is installed in the product chassis. The wires are probably longer > than we need, but you need some length to ease the handling of assembling > this. The wires go in sort of a J shape, straight out of the terminal > housing and then curving down or up and back to the vias on the PCB's. > They were shown how the wires were preformed and routed off the boards to > the terminal housing to limit the wiggling and strain they would go thru > once they were soldered to the boards, and they say they've done that, but > that they are still breaking. They INSIST we find another solution. > > Suggestions? > > Genny Gibbard ( <mailto:[log in to unmask]>) > > > --------------------------------------------------- > Technet Mail List provided as a free 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/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 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------