Interesting discussion on using rubber erasers to "polish" fiducials..... I presently have a customer who has to polish his fiducials in a similar manner before his vision system can locate our boards. I want to try and help this customer get out of this practice. The board has a HASL finish. Can anyone shed any light as to the root cause of this issue and reccomend solutions (preferrably board related fixes - if there are any). I have also read in the forum that gray scale vision systems can remedy this. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************