We use an x-ray machine with the capability of measuring fiducial locations on each layer. This data is used to determine the artwork scaling. For the most part, standard scaling can be used but there are particular designs/stack-ups which require custom scaling. On 22 Dec 2004 at 13:35, Pete menuez wrote: Frank: I know of board shops that swear by the Perfect Test system. These tend to be larger companies that have the resources to throw at it. Some consideration: -You have to give up some real estate on the panel to place the coupon. -You will be adding on a fair amount of drill hits -You will have to read and analyse the data -You will have to put this back into CAM to adjust scaling. This should all be a closed loop system One company I heard of in the Northeast (No longer in business) had registration dialed in for every layup; including panel size, core thickness and even the prepreg used against the core. I think most companies, if they add this coupon to the panel, program the coupon seprately so they can turn off the coupon when the panel is in production. (after testing)l There are a number of these systems available through used equipment dealers. Good Luck, pete >From: Franklin D Asbell <[log in to unmask]> >Reply-To: TechNet E-Mail Forum <[log in to unmask]>, Franklin D >Asbell <[log in to unmask]> >To: [log in to unmask] >Subject: [TN] PerfectTest registration control system >Date: Tue, 21 Dec 2004 12:14:10 -0600 > >Is anyone out there familiar with the PerfectTest registration control >system? If so how would yo rate it? > >As we evolve into tighter space/trace features including annular ring, >vias, bga etc etc we are looking for better controls for registration and I >found the system identified above, was wondering what other shops are using >for process control, testing or inspection of registration, other control >methods, materials, etc etc etc... > >Thanks, > > >--------------------------------------------------- >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 >----------------------------------------------------- >Franklin --------------------------------------------------- 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 ----------------------------------------------------- -- Thanks, Eddie Rocha South Bay Circuits (480) 940-3125 x122 --------------------------------------------------- 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 -----------------------------------------------------