Don, Ask you CM or Production Engineer about the Pick n' Place machine requirements. The CM we are currently using requires two Fiduicals within 6 inches of a given part. For a large board (14"x14") there would be more "local" Fiduicals than for a small board ( 2"x 2") where one could get away with just global Fiduicals. Hope this helps. Dave Donald Kyle wrote: > 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.+ > -- Dave Seymour, CID+ Catapult Communications Inc. 800 Perimeter Park Dr, Suite A Morrisville, NC 27560 Direct: (919)653-4249 Main: (919)653-4180 Fax: (919)653-4297 [log in to unmask] --------------------------------------------------- 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 -----------------------------------------------------