Julien - We once had a similar problem and resolved it by slowing down the conveyor. Assuming the conveyor you are talking about is between equipments, you should be able to get a variable speed motor to replace the conveyor's current motor. If the conveyor you are talking about is inside the PNP, that conveyor's speed may be programmable. Good Luck! Ed Valentine Electronics Manufacturing Solutions 8612 Mourning Dove Road, Raleigh, NC 27615 Phone: (919) 270-5145, Fax: (919) 847-9971 Email: [log in to unmask] Website: http://www.ems-consulting.com ----- Original Message ----- From: "Julien Bouchard" <[log in to unmask]> To: <[log in to unmask]> Sent: Monday, September 11, 2000 11:03 AM Subject: [TN] Displacement of PQFP with heat slug > Hi everybody, > We currently have problems with some PQFP ( 208 and 240 pins ) that have a > piece of metal mold inside the IC to enhance the thermal exchange. Because > of this metal, the IC is very heavy, in comparaison of other IC. After they > have been place by the pick and place machine, they often move from there > original position when the conveyor start or stop. It seem that the IC is so > heavy, and is inertia is taller than the retention force of the paste. We > try a lot of solution, but none of them give a good and constant result. > We want to know if someone have similar problem and if a good solutions > have been found. Thank you. > > Julien Bouchard > Matrox - Process Engineer > Email : [log in to unmask] > > ############################################################## > 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 ##############################################################