Hi Leif, As a CM it varies greatly. We sometimes get boards that do not have fiducials on them and end up using a PTH or a SMT pad. With this set-up it's not uncommon to incorrectly read what is being used as a fiducial and end up with a misprint. I'd say this happens about 20% of the time we need to do it. When we have a proper board with fiducials properly designed and located and we wipe the stencil as specified any misprint triggers a corrective action. This is for products that are released for production. On NPI we may have some misprints before we are completely happy with the alignment but still a maximum of 2-3 panels. Regards, Jerry Dengler Production Manager Pergamon Corporation PH: 610-239-0721 Fax: 610-239-0720 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Leif Erik Laerum Sent: Thursday, February 19, 2009 9:00 AM To: [log in to unmask] Subject: [TN] Misprints Technetters, We are discussing misprints and what would be an acceptable ratio of misprints. What are people on this forum comfortable with? I realize this this is a very open ended question, but it would be interesting to hear if there is a industry consensus on this one. What would trigger corrective action? Thank you! -- Leif Erik Laerum Quality Assurance Manager Texas Memory Systems [log in to unmask] Tel: (713) 266-3200 x468 www.texmemsys.com --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------