I've used both at various employers. Make sure the fluxer is reciprocating to prevent shadowing and ensure even coverage across the panel. The original ultrasonic designs did not provide sufficient fluid velocity for fluxing up plated through holes, where top side fillets looked fine on atomized fluxers (air and airless). The newer ultrasonics perform much better. The 75% reduction is real if the operator's hands can be kept off the controls, and the correct fluxer is chosen. It is a learning experience to train operators that raising flux flow beyond the minimum does not impact yield. Excess flux molecules may not even contact the metalization. ------------- Original Text From: C=US/A=INTERNET/DDA=ID/TechNet(a)IPC.ORG, on 3/5/98 1:18 PM: Hi everyone: I need some help on Automatic Fluxers. We are thinking about installing them on our 3 Electrovert machines. 1- What are the Pros and Cons of Ulrasonic Fluxers? 2- What are the Pros and Cons of Pressure Fluxers? 3- Is it true you can save up to 75% of the cost of Flux and Thinner by using these fluxers? Manufacturers claim. 4- We have openings in our boards, does this pose a problem? Any other information will be greatly appreciated. Thanking you in advance, Karl J ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ 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 web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################