Hi Graham Now with the standards Jim mentioned the return loop is just about inevitable (in time) . I've had a similar dream ; is the bulk feeding development far enough to have a flip pin [with a slide slope incorporated] or air puffer (yes blowing controlled dose of air ; let's keep it technical here folks ; and I really do not want to mention the vibrating reversing loop possibility here [takes too much room]) on colour sensor incorporated to handle all polarized SMD's ; or do we have to make it ourselves ? This tapes rhyme with apes (Steve's bad influence) ; the waste ; space; peel, handling , etc. ! ; drive me nuts ( do you know why squirrels run after Harleys? ) . I can live with them on chips but on passives it's extreme . Not with squirrels ; >the tapes . Who would know ( not "think" ) ? PS presently ; Graham , I'd worry only about power items . Thanks a lot for raising the subject . Paul Klasek http://www.resmed.com > ---------- > From: Collins, Graham[SMTP:[log in to unmask]] > Sent: Friday, 14 August 1998 2:55 > To: [log in to unmask] > Subject: Is resistor orientation (upside down) a concern? > > Technetter's > A theoretical question.. It has been my understanding that surface > mount resistors had to be mounted right-side up (white side down) to > facilitate the proper heat dissipation from the part. Is this in fact > true or have I been misinformed? > If true, how do I manage to keep them right-side up if I'm using a > bulk feeder where the part orientation is not controlled as it is on > tape? > > regards, > > Graham Collins > Process Engineer > Litton Systems Canada > (902) 873-2000 extension 215 > ################################################################ 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 ################################################################