Good morning I have one of those It Depends questions regarding fiducials and pick-n-place machines. Per IPC-7351 and I'm sure other standards, a board at minimum should have two fiducials on each end and each side. Furthermore, if there are fine pitch components there should be two fiducials for each fine pitch component, sharing of fiducials is ok. For assembly houses that place components at a billion a second I can see the justification for the above requirements. But lets say that your customer requires typically 5 to 10 boards per run and those boards have fine pitch components. It's not likely that they would be asking you to build them but maybe you like to do prototypes and these quantities will fit somewhere in your production area. So my question to assembly houses is: Can you live with fiducials placed every two inches across a board such that any fine pitch component has two fiducials within two inches? Is it possible to adjust the speed of pick-n-place machines to accommodate for these parameters? Thanks in advance Donald Kyle C.I.D.+ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 -----------------------------------------------------