Re: [PEDA] Fan out Via clearance
Shuping Lew wrote: Jon, Thank you very much for your replied. Could you describe some more details? ---How to set up different grids for Vias and traces? Grid setting for traces should be much smaller than Via's... I'd like to set up 5mil for traces and 55 mil for vias so I can run a trace in between. Is there any way to set up different grids for auto router? Yes, you have a point, there. The detailed way to do this probably to set a rule such that vias cannot be closer than some calculated amount to other vias on a different net. (Does the autorouter follow such a rule?) Make that clearance enough so that a track plus the clearance on each side can then make it through between them. I can never remember exactly which rules the autorouter follows, and which it ignores. (The rules setup does tell you which ones are observed by the router.) Note that the grid is not an absolute restriction on track endpoints, however. If the track ends on some other primitive, it is allowed to go off-grid to hit the center of that primitive. That won't work for intermediate track segments, however. Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Fan out Via clearance
Jon, if this is true, it then explains why all those short tracks appear under pads. Basically, it is not a gridless autorouter, unless there is a definition of 'gridless' that is different from my understanding of the word. Igor -Original Message- From: Jon Elson [mailto:[EMAIL PROTECTED]] Sent: Thursday, 17 October 2002 5:33 AM To: Protel EDA Forum Subject: Re: [PEDA] Fan out Via clearance Shuping Lew wrote: Jon, Thank you very much for your replied. Could you describe some more details? ---How to set up different grids for Vias and traces? Grid setting for traces should be much smaller than Via's... I'd like to set up 5mil for traces and 55 mil for vias so I can run a trace in between. Is there any way to set up different grids for auto router? Yes, you have a point, there. The detailed way to do this probably to set a rule such that vias cannot be closer than some calculated amount to other vias on a different net. (Does the autorouter follow such a rule?) Make that clearance enough so that a track plus the clearance on each side can then make it through between them. I can never remember exactly which rules the autorouter follows, and which it ignores. (The rules setup does tell you which ones are observed by the router.) Note that the grid is not an absolute restriction on track endpoints, however. If the track ends on some other primitive, it is allowed to go off-grid to hit the center of that primitive. That won't work for intermediate track segments, however. Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Fan out Via clearance
Shuping Lew wrote: Hello, all, I am using Protel 99Se Auto router for fan out Vias. I'd like to have one trace go in between fan out vias. Is there a rule to set it up? Thank you very much! Fortunately, fanout is one of the first things it does. You should be able to find a combination of track width, via OD, and grid that will cause the vias to be placed far enough apart to allow a trace to pass between them. It may take some tinkering. You may want to set particular rules, just do fanout in the autorouter run, then change the rules and run again, with lock all preroutes. Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Fan out Via clearance
Jon, Thank you very much for your replied. Could you describe some more details? ---How to set up different grids for Vias and traces? Grid setting for traces should be much smaller than Via's... I'd like to set up 5mil for traces and 55 mil for vias so I can run a trace in between. Is there any way to set up different grids for auto router? I sent a email to Protel here is the answer... Thank you for contacting Protel technical support regarding your issue. Unfortunately there is no rule that will allow you to have one trace go in between fan out vias. ---Shuping -Original Message- From: Jon Elson [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 12:38 PM To: Protel EDA Forum Subject: Re: [PEDA] Fan out Via clearance Shuping Lew wrote: Hello, all, I am using Protel 99Se Auto router for fan out Vias. I'd like to have one trace go in between fan out vias. Is there a rule to set it up? Thank you very much! Fortunately, fanout is one of the first things it does. You should be able to find a combination of track width, via OD, and grid that will cause the vias to be placed far enough apart to allow a trace to pass between them. It may take some tinkering. You may want to set particular rules, just do fanout in the autorouter run, then change the rules and run again, with lock all preroutes. Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Fan out Via clearance
Jon's point was that you'll need to do this in 2 passes. First, set grid rules that will optimize your via placement, and run the autorouter with ONLY Fan out used SMD pins checked -- clear all the other pass check-boxes. See how the vias look, maybe adjust rules/grid. You might try a specific via-to-via clearance rule. Once you have the vias looking good (and maybe adjust manually, too!), make a backup copy of your PCB, then change your grid/rules for track spacing, and run the autorouter will all the other passes checked, making sure you have Lock all preroutes checked. -Original Message- From: Shuping Lew [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 2:15 PM To: Protel EDA Forum Subject: Re: [PEDA] Fan out Via clearance Jon, Thank you very much for your replied. Could you describe some more details? ---How to set up different grids for Vias and traces? Grid setting for traces should be much smaller than Via's... I'd like to set up 5mil for traces and 55 mil for vias so I can run a trace in between. Is there any way to set up different grids for auto router? I sent a email to Protel here is the answer... Thank you for contacting Protel technical support regarding your issue. Unfortunately there is no rule that will allow you to have one trace go in between fan out vias. ---Shuping -Original Message- From: Jon Elson [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 12:38 PM To: Protel EDA Forum Subject: Re: [PEDA] Fan out Via clearance Shuping Lew wrote: Hello, all, I am using Protel 99Se Auto router for fan out Vias. I'd like to have one trace go in between fan out vias. Is there a rule to set it up? Thank you very much! Fortunately, fanout is one of the first things it does. You should be able to find a combination of track width, via OD, and grid that will cause the vias to be placed far enough apart to allow a trace to pass between them. It may take some tinkering. You may want to set particular rules, just do fanout in the autorouter run, then change the rules and run again, with lock all preroutes. Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] Fan out Via clearance
Thank you. I will give it a try. -Original Message- From: Dwight Harm [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 5:02 PM To: Protel EDA Forum Subject: Re: [PEDA] Fan out Via clearance Jon's point was that you'll need to do this in 2 passes. First, set grid rules that will optimize your via placement, and run the autorouter with ONLY Fan out used SMD pins checked -- clear all the other pass check-boxes. See how the vias look, maybe adjust rules/grid. You might try a specific via-to-via clearance rule. Once you have the vias looking good (and maybe adjust manually, too!), make a backup copy of your PCB, then change your grid/rules for track spacing, and run the autorouter will all the other passes checked, making sure you have Lock all preroutes checked. -Original Message- From: Shuping Lew [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 2:15 PM To: Protel EDA Forum Subject: Re: [PEDA] Fan out Via clearance Jon, Thank you very much for your replied. Could you describe some more details? ---How to set up different grids for Vias and traces? Grid setting for traces should be much smaller than Via's... I'd like to set up 5mil for traces and 55 mil for vias so I can run a trace in between. Is there any way to set up different grids for auto router? I sent a email to Protel here is the answer... Thank you for contacting Protel technical support regarding your issue. Unfortunately there is no rule that will allow you to have one trace go in between fan out vias. ---Shuping -Original Message- From: Jon Elson [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 12:38 PM To: Protel EDA Forum Subject: Re: [PEDA] Fan out Via clearance Shuping Lew wrote: Hello, all, I am using Protel 99Se Auto router for fan out Vias. I'd like to have one trace go in between fan out vias. Is there a rule to set it up? Thank you very much! Fortunately, fanout is one of the first things it does. You should be able to find a combination of track width, via OD, and grid that will cause the vias to be placed far enough apart to allow a trace to pass between them. It may take some tinkering. You may want to set particular rules, just do fanout in the autorouter run, then change the rules and run again, with lock all preroutes. Jon * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
