Well, dear Steve (what's that shooting near by Tulsa ?), now you start to understand why after two decades of validations and revalidations and rerererevalidations I still swear by good foam (no clean flux that is , not Urquell lager). With NiAu boards i'd have very little chance with spray . i know 'm in a decadent minority here, but check with those like Wade and Daan as well, as far as the quality of fluxing goes (and tidiness) ; spray 's overengineered underperforming misapplication . (my opinion , ok, heard/seen/validated all the reasonings ever, don't shoot!); my (drastic, sorry) advice 'd be : get the long stone from Wade and switch back . Your wave fellow will worship you ; the difference in maintenance and cleaning is not to be sniffed at . By the way your QC (nothing personal Nancy [love 'em too])is bit naive "hoping" dry (nonfluxed)tops will reflow to the tops after re-wave, doesn't work that way (as you know) . And hand job is a real desperation , with worst consequences still (as you know) . Otherwise you can chat up the QC on reasoning that majority of heavy loaded P/S cards are SINGLE sided copper, with no barrel at all ........................etc. wish yo' luck (sincerely) cu paul -----Original Message----- From: Stephen R. Gregory [mailto:[log in to unmask]] Sent: Tuesday, 7 December 1999 12:21 To: [log in to unmask] Subject: [TN] Spray Fluxers and Topside solder fillets... Hi ya'll! Well, I started wave-soldering with my new beast today, and promptly got into a head-butting contest with QA. We switched from foam fluxing to spray fluxing, and there's problem with QA...(what's new? sheesh...) The issue that they're having a problem with is the topside fillet appearance. It does appear that the parts that have a clinch or parts that have a stand-up/lock-in prep to the leads on them, may not have the feathered, tapering fillet that rises above the surface of the PCB like we saw with a foam fluxer, or with leads that drop-in straight to the board. In my opinion, there's not a problem, and the fillets meet class-II, but here it's so hard to teach a old dawg new tricks, as far as they're concerned; "They don't look like they used to...". The fillets are perfectly fine on the bottomside, wetting 360-degrees, but on the top they may not fully taper above the board and may be depressed a bit, but no more than 75%. and the fillets are wetted to the barrel higher up than it has on the lead...so under a microscope, the fillet looks to taper down to the lead. The inspectors are calling this non-wetting to the lead. I'm saying BS...the fillets are acceptable. QA is trying to get me to re-wave the boards!...or have the joints reworked by hand! Sheesh...does it ever end? Anyways, have those of you that have had experience with spray fluxers ever run into this issue? I'm using a Kester 2331-ZX (pretty active), but it's a foam fluxer formula, but I'm still getting good coverage by spraying it. I was told that I might need to get a spray formula if I didn't get good coverage. Any inputs? -Steve Gregory- ############################################################## 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 ##############################################################