Don As Jun mentioned you have to use the paste special. I have used it on multilayer designs.
Mike Reagan EDSI Frederick MD -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Don Sent: Tuesday, October 26, 2004 5:12 PM To: Protel EDA Discussion List Subject: Re: [PEDA] how to merge three PCB to one The cut & 'paste special' method works well with 2 layers but seemed to stumble with connectivity on the inner planes on 4 layers. Or did I just flub something... Otherwise this means much more use of camtastic as our fab has a great deal on multi-layer if you supply work as a panel that they don't have to mess with (much). Cheers Don Dennis Saputelli wrote: > this comes up all the time > > we use your method #1 almost every day with no troubles > > using this method you also get full DRC checking as well > whereas if you use the paste special method you do not > > don't forget that not only is pcb cost lower but overall > handling and assembly costs are lower (assuming the boards are used as a > 'set' which is what we do) > > something you have to think about however is how you are going to > singulate the boards > as you get into tab routing, mouse bites and other features which may > not otherwise be needed you start to erode a bit of the benefit > > we have been scoring some of these things lately > before you say it is crummy method please realize that scoring has come > a long way in the last decade just like the rest of pcb fab tech > > they can now do jump (or skip) scoring, hold accuracy to maybe 10 thou > and other stuff > for todays NC scoring machines due to FR4 fringing leave 20 thou (mils) > min between the score line and the edge of an outer trace or Cu > > 40 is probably a smarter choice so that is one down side to scoring > > nominal score depth s.b. 1/3 T from each side > > this varies with how big a piece you have to grab though (leverage) > narrow breakoffs need to be scored deeper > very heavy big bds with a score in the middle may be scored less deeply > > also there are stresses to consider during the singulation whatever > method is used > > if the board has slots or routing operations anyway then maybe drop a > few obrounds in the scored areas to reduce the stresses of the > singulation process > > also the edges will not be extacly pristine but may be suitable for many > purposes and don't have to be cleaned up like the tab & mouse bite routine > > Dennis Saputelli > > _______________________________________________________________________ > Integrated Controls, Inc. Tel: 415-647-0480 EXT 107 > 2851 21st Street Fax: 415-647-3003 > San Francisco, CA 94110 www.integratedcontrolsinc.com > > > é wrote: > >> Hello everyone, >> >> I have three small PCB and I want to merge them to one PCB in order to >> decrease the cost. I am thinking about two method as following but >> either has demerit. Could you please give me some advice? >> >> (1) Design the three PCB in one project. But the designator name >> cannot repeat so I must name the parts of the1st PCB from "U1" to "U5" >> then the 2nd PCB from U6 to U10 (for example) and so on. >> >> (2) Design the three PCB in three projects. But when I output the >> three gerber data files I cannot merge them into one gerber data file. >> >> Thank you for any advice. >> >> >> >> >> ____________________________________________________________ >> You are subscribed to the PEDA discussion forum >> >> To Post messages: >> mailto:[EMAIL PROTECTED] >> >> Unsubscribe and Other Options: >> http://techservinc.com/mailman/listinfo/peda_techservinc.com >> >> Browse or Search Old Archives (2001-2004): >> http://www.mail-archive.com/[EMAIL PROTECTED] >> >> Browse or Search Current Archives (2004-Current): >> http://www.mail-archive.com/[EMAIL PROTECTED] >> >> > > > > ____________________________________________________________ > You are subscribed to the PEDA discussion forum > > To Post messages: > mailto:[EMAIL PROTECTED] > > Unsubscribe and Other Options: > http://techservinc.com/mailman/listinfo/peda_techservinc.com > > Browse or Search Old Archives (2001-2004): > http://www.mail-archive.com/[EMAIL PROTECTED] > > Browse or Search Current Archives (2004-Current): > http://www.mail-archive.com/[EMAIL PROTECTED] > > > ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[EMAIL PROTECTED] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[EMAIL PROTECTED] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[EMAIL PROTECTED] ____________________________________________________________ You are subscribed to the PEDA discussion forum To Post messages: mailto:[EMAIL PROTECTED] Unsubscribe and Other Options: http://techservinc.com/mailman/listinfo/peda_techservinc.com Browse or Search Old Archives (2001-2004): http://www.mail-archive.com/[EMAIL PROTECTED] Browse or Search Current Archives (2004-Current): http://www.mail-archive.com/[EMAIL PROTECTED]
