Steve, I believe that Garland Service Company (www.gogsc.com <http://www.gogsc.com> ) makes a mother/daughter carrier that allows you to rotate the board to any angle you would like. You may find that an angle other than 45 degree will give you even better yields. Also the outer carrier can be used with a variety of inserts, thus saving you money if you have other assemblies down the road requiring the same approach. Mike McMonagle Senior SMT Engineer Telxon Corporation www.telxon.com <http://www.telxon.com> -----Original Message----- From: Stephen R. Gregory [mailto:[log in to unmask]] Sent: Tuesday, October 03, 2000 3:52 PM To: [log in to unmask] Subject: Re: [TN] Wave soldering bottom SMT, there's hope!!! Hey everybody!! Remember about a week ago I posted about a little mixed technology board (actives on the top, passives on the bottom) that we do here that is laid-out pretty bad as far as wave soldering goes, and we have all this touch-up that we have to do after wave? Well there's hope. Ed Popielarski suggested something to me that I didn't think of. It was using a fixture that oriented the board 45° to the wave...he was able to get one for me to try just to see if it made anything better...and boy did it!! Go to: http://www.driveway.com/share?sid=e25a88c4.8e904&name=Pictures You'll see two pictures there, one is: With45.jpg, and the other is: without45.jpg...let me tell you, the Without45.jpg is pretty ugly. I still did have a few defects with the 45° orientation, but nowhere NEAR like I was having before. Most of the defects are with them pesky SOT-23's, and because of the layout, I think there's always going to be some touch-up... I'm gonna be getting some dedicated 45° fixtures made for these guys, and just maybe be able to tweak things even better! Thanks Ed!! -Steve Gregory- > Hi ya'll!! > > I wished this little beast lent itself to a selective wave soldering pallet, > but it don't. Go to: http://www.driveway.com/share?sid=e25a88c4.8e904&name= > Pic > tures > and look at "Funwave.JPG" to see what I mean. > > You can see by the dime I put there how big it is. This comes in a 10-up > panel. There's about a dozen SOT's, eleven-1206's, and around thirty-0805's > on the backside. Up top there's three-14-pin, one 8-pin, and one 6-pin DIP > IC. There's also one 5-pin right angle header, as well as two radial caps, > one axial fuse, and a 3-pin PTH transistor. > > The 14-pin straddle mount connector and the two LED's have to be hand > soldered because they also straddle the board. The variable resistor on the > backside also is hand soldered because it can't be waved...fun stuff huh? > > We do get skips...mostly on the SOT's that I've seen...Mike said he's seen > some on the other passives as well. We do get other defects because of the > layout of things on the bottom. Those two 1206 caps in the upper right > corner > bridge quite a bit, and there's always the excess solder on the leading edge > of a component that's oriented the wrong way to the direction of travel in > the wave. > > Me and Mike have been discussing this wonderfully designed board. My opinion > is that using paste and adhesive may take care of some of the problems, but > with this board there's always going to be touch-up. ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8d ############################################################## 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 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 1.8d ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################