Since the two replies I received were from people using ultrasonic cleaners I'm starting to think it's my cleaner with the problem more than the printer. The wiper/vacuum system on the printer seems to work quite well. Of course, we can't afford to replace the cleaner we have... Thanks for the feedback. > -----Original Message----- > From: Lambert, Katherine A. [SMTP:[log in to unmask]] > Sent: Monday, August 16, 1999 4:12 PM > To: [log in to unmask] > Subject: Re: [TN] Solder paste stencils > > We haven't had a problem with paste on the back of the stencil. You may > want to investigate your stencil printer to see why it isn't performing > properly. We have an ultrasonic stencil cleaner that seems to clean > solder > off stencils very easily with a 2 minute cycle. > > Kathie Lambert > Process Engineer > Northrop Grumman > Baltimore, MD > > -----Original Message----- > From: Martin, Jesse [SMTP:[log in to unmask]] > Sent: Monday, August 16, 1999 3:08 PM > To: [log in to unmask] > Subject: [TN] Solder paste stencils > > Has anyone had a problem with solder paste stencils that have a > build up of solder paste on the bottom (PCB) side of the stencil that > won't > come off in the stencil cleaner? I think what happens is the vacuum/paper > wiper leaves some on the bottom after each wipe and the more it wipes the > harder it is to get off. I can pop it off with an Xacto knife or the like > but is very time consuming. Only other thing that works is using a > Scotchbrite pad but that leaves a lot of scratches (which probably causes > faster build up). Have also tried stainless steel cleaner with no luck. We > use an old Austin American batch aqueous cleaner with saponifier at 120 > degrees F. Any and all ideas welcome. > > ############################################################## > 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 ##############################################################