Yep, still here , buried under "projects" like seems everybody else ' Bev's not biting ; Dave ; etc. this run up y2k is hectic . Got a fright when Hugo tried to deregister me ; but , still here : Fikreta, (it does help not to have a name like Steve or Paul ; the ID is clear); apart from what you find in archives on this subject one thing I did not see that much emphasised ; remembering from old telecom days : Exposed copper is not the best thing to have on solder side (forbidden on some jobs); and milling/grinding/cutting/ this close does jolt the lead as well ; solder being not weld ; I've seen leads very much peeled from surrounding fillets after shave or cut ; and no , it was not a dry joint issue . Therefore my solution would be : Bend the rules of prescribed leg protrusion = inspect from top (you're still better off with filled barrel than smd joint); prep the leads to less than board thickness and wave ; with bit of luck you should not have anything ever . If you get some icicles ; make a slide over vacuumed and earthed (copper tail) linisher gliding on foam and plate ; it will look good too as all the joints will have uniform dressing . The slide can be as simple as steel trims clipped on side of board to maintain the specified height . Needless to say keep ESD in considerations on every step . Filter on that vacuum would be nice . See you folks ; good to know yo' out there . How's the StarWars ; any decent models to glue up ; or is it all McLUCAS merchandise ? Paul Klasek http://www.resmed.com -----Original Message----- From: Stephen R. Gregory [mailto:[log in to unmask]] Sent: Wednesday, 19 May 1999 4:06 To: [log in to unmask] Subject: Re: [TN] leads trimming In a message dated 5/18/99 10:26:20 AM Pacific Daylight Time, [log in to unmask] writes: << Hello there, I have requirements to trim leads down to 0.035". Have anybody try to prep that short before wave. Board size is 4"x6" . I would like to know if any experience with machines that trim leads. Fikreta Jusufagic Mfg. Engineer Sanmina Co, San Jose Voice: (408) 954-5594 Fax: (408) 954-5277 >> Hi Fikreta! You sure that's TRIMMING leads? Sounds more like SHAVING them to me! (GRIN) That is some short puppies... I've had to do some boards like that before, only because of the poorly designed case that the board had to go in, if you didn't trim them that short things could short out on the case. But I did it after wave...there was a lot of radial components on the board that also had to stand-off the board, and if I trimmed them before wave they would fall over. As far as equipment, a good person to send a email to asking about that stuff is Paul Klasek ([log in to unmask]) if he doesn't read this email already...he's on the TechNet too. (HEY PAUL! Ya' there?) I remember him helping somebody out a while back using one of those teflon-coated, spinning blade deals...the name Q-Tron seems to stick in my mind for some reason? As far as I'm concerned, the only reason you should need to trim leads that short is because somebody wasn't thinking when they designed whatever product you're building. They shoulda left room for at least 60 to 100 thou.. Trimming leads that short there's always the chance of fracturing the joints.. But hey, I know how it is, you get whatever the customer gives you...you being at Sanmina, a contract assembly company like me, you do the same thing I hafta do too... -Steve Gregory- ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################