>Richard, > > We normally use round lighted lenses ( 3x ) to overral inspection and >microscope to check places that operators are not sure that were good on the >previous inspection. Some operators claim about headache if continuos use of >microscope is required, so we try to avoid this situation using microscope >only to check doubts had on the first inspection. > Check the operator vision health before assign him this job.Some people >didn`t realize that they can`t see very clear. > Regarding with AOI ( Automated Optical Inspection ) equipments I am not >familiar with, but I don`t known how this system can handle HASL boards if >the contrast between the solder and pad is too little. Someone has the >answer ??? > >Jorge Dourado de Santana >Maintenance / Process Engr >Microtec - Brazil > Jorge, One way to avoid the headaches is to digitize the microscope images and display them on a monitor. We have such a setup, and it saves the eyes, if you have to do hours of inspection. I can get you brand names and models of the equipment if you're interested. Michael Meltzer Lawrence Livermore National Lab ############################################################## 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 ##############################################################