I usually just add a small copper shape on the center of the pad and give it the correct net name. (static solid) This usually makes the connection. Date: Wed, 27 Aug 2008 09:08:32 -0700From: maveric0@xxxxxxxxxxxxxxxxxx: [PCB_FORUM] Re: How to connect Two thru-hole pads that are placed same location.To: icu-pcb-forum@xxxxxxxxxxxxx Mark:Here is what we do:1. one padstack is thru hole pin, lets say for the top connector2. one padstack is smt, for the bottom connector3. 3. you will need to go into constraint manager and change the Allow-> Pad-Pad Connectto ALL_ALLOWED--- On Wed, 8/27/08, Dave Seymour <dseymour@xxxxxxxxxxx> wrote: From: Dave Seymour <dseymour@xxxxxxxxxxx>Subject: [PCB_FORUM] Re: How to connect Two thru-hole pads that are placed same location.To: icu-pcb-forum@xxxxxxxxxxxxxxxxx: Wednesday, August 27, 2008, 8:02 AM That’s fine. So, you need a work around in Allegro to get rid of the ratsnest lines. Make sure you leave “stretch etch” box checked when you move the connector back into position. Which was the original idea below: Mark, I never have done this, but it seems like it might work. Move one of the connectors off board and make the connections, then move the connector back into position. If I had to guess, Allegro will keep the connection. Just an idea, Hope this helps. Dave Seymour Ixia 919.267.4840 From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Mark SalbergSent: Wednesday, August 27, 2008 10:58 AMTo: icu-pcb-forum@xxxxxxxxxxxxxxxxxxxx: [PCB_FORUM] Re: How to connect Two thru-hole pads that are placed same location. Our schematic feeds the BOM. Must have both in the schematic for different populations.Dave Seymour wrote: Well, one could make a special padstack and remove the drill, just like an SMT pad and waive the DRCs. IMHO - The best way to would to let the BOM control which connector is populated and only have one connector on the schematic. In some backplane applications, the pins are really short and the primary side connector and the secondary side connector share the same hole. On this type of backplane we have the BOM control the connector and the schematic shows only one connector, even though both connectors (top, bottom) are populated. D Dave Seymour Ixia 919.267.4840 From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Gerry MeierSent: Wednesday, August 27, 2008 10:34 AMTo: icu-pcb-forum@xxxxxxxxxxxxxxxxxxxx: [PCB_FORUM] Re: How to connect Two thru-hole pads that are placed same location. What is that doing to do to your ”Drill file” Double drills?? Gerry Meier, Sr. PCB Designer Freedom CAD Services. Inc Voice: (256)776-7470 or (603) 864-1350 Email:gerry.meier@xxxxxxxxxxxxxx visit us at http://www.freedomcad.com From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Dave SeymourSent: Wednesday, August 27, 2008 9:32 AMTo: icu-pcb-forum@xxxxxxxxxxxxxxxxxxxx: [PCB_FORUM] Re: How to connect Two thru-hole pads that are placed same location. Mark, I never have done this, but it seems like it might work. Move one of the connectors off board and make the connections, then move the connector back into position. If I had to guess, Allegro will keep the connection. Just an idea, Hope this helps. Dave Seymour Ixia 919.267.4840 From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Mark SalbergSent: Wednesday, August 27, 2008 10:11 AMTo: icu-pcb-forum@xxxxxxxxxxxxxxxxxxxx: [PCB_FORUM] How to connect Two thru-hole pads that are placed same location. We have two thru-hole connectors placed on top of one another. One populated, one not.PROBLEM: We can not get rid of rats, because two pins / pads at same X:Y.Any ideas how to get connection to both pads?We decided to remove net names from one of the connectors in the schematic, to allow us to connect to one pad on board. Then waive DRC's.We are using V.15.7 and Concept front end.Regards,Mark This correspondence and any attachments are considered confidential. If you are not the intended recipient, please notify Freedom CAD Services, Inc. immediately by either replying to this message or by sending an email to operations@xxxxxxxxxxxxxx; please destroy all copies of this message and any attachments. Thank you. _____________________________________________________________________________Scanned by IBM Email Security Management Services powered by MessageLabs. For more information please visit http://www.ers.ibm.com_____________________________________________________________________________ _____________________________________________________________________________Scanned by IBM Email Security Management Services powered by MessageLabs. For more information please visit http://www.ers.ibm.com_____________________________________________________________________________