Hi Rainer could you enlighten me please: why the spot-bond , and what is the detrimental effect occurring (?) with loose seat ? (upon loose cooling on crystalline formations ?) Always thought th joint is actually too robust (as those with cavities actually live longer), but if you say this kind of effort is worth it , than 'm missing something . And how do you spot-bond actually (hand?)? Would a delayed heat (quartz tube just behind wave) postpone the solidus just long enough to freeze in peace ? What would be the validated/qualified difference with and without (the spot-bond)? thanks ahead (i'd say more of us 2nd classers would be interested) Paul Klasek ResMed -----Original Message----- From: Blomberg, Rainer (FL51) [mailto:[log in to unmask]] Sent: Thursday, 6 January 2000 3:32 To: [log in to unmask] Subject: Re: [TN] Component Stabilizing for Wave Solder Yes, we also build class 3 and spot-bond all thru-hole components prior to wave solder. Without this, there is too much part movement to assure a good joint every time. In our case, the effort is worth it, so we continue with success. R. G. Blomberg Honeywell International Space Systems Staff Production Engineer (727) 539-5534 voice 727-539-4469 Fax [log in to unmask] -----Original Message----- From: Kenny Bloomquist [mailto:[log in to unmask]] Sent: Wednesday, January 05, 2000 10:54 AM To: [log in to unmask] Subject: [TN] Component Stabilizing for Wave Solder Hello Fellow TechNeters, We build Class 3 hardware per J-STD-001 and stabilize every through hole component prior to wave solder. I believe this is a hold over from Mil. Spec. days and wondering if anyone else is doing this. The requirement per J-STD-001 is to "process in a manner that precludes movement that detrimentally affects formation of acceptable solder connections." To stabilize or not to stabilize, that is the question. Thank you, Ken Bloomquist Sr. Principal Process Engineer PRIMEX Aerospace Company P.O. Box 97009 Redmond, WA 98073-9709 http://www.primextech.com Ph: 425-885-5000 FAX: 425-882-5786 [log in to unmask] Northcon/2000, Chairman of the Board http://www.northcon.org Electronics Manufacturers Association (EMA), President http://www.ema-wa.org ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################