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HI Duane Before I can give an answer to all of your question....I need to know did you follow my step by step instructions for fanning out? I typically can route any design ( large ones with several thousand components ) in 5 passes. The secret is the routing channels must be kept open. Secondly, what is are you calling the "basic do" is this the do file Protel generates? (DXP only). I would stay away from assigning directives like "any direction" this will only complicate things by not steering the router to work for you. Two layer designs work as easily as multilayer ....as long as you have open channels. That is key. On very populated tight designs I discount the component side as a routing layer because the components are in the way.
Electra will route 100 percent, as long as your rules make sense. Take a closer look at your rules and make sure they make sense. ie can a 10 mil line fit inside a 8 mil gap Let me know how I can help. And thanks for reading it. Mike Reagan -----Original Message----- From: Duane Foster [mailto:[EMAIL PROTECTED] Sent: Thursday, July 22, 2004 4:18 PM To: Protel EDA Forum Subject: Re: [PEDA] Autorouting Techniques Thanks for the white paper Mike. I have been curious to try the Electra autorouter ( mainly because of your enthusiastic plugs ), and so I read your white paper and got the demo. I routed a small double sided board with SMD on both sides. I was able to get 100% routed in 99SE using 10/10 and 12mil spacing SMD-track. 99SE router will not do my desired 14mil SMD-via spacing, so i manually adjusted offending vias and cleaned up. I am trying Electra on the same layout and initially getting 94% completion and no adherance to any special clearance rules. I tried using your DO file and it seems ROUTE 5 is inadequate. Am i misunderstanding your intention? I tried the basic.do file with an addition of "rule pcb (clearance 12 (type smd_wire)". I did not see any adherance to this special rule in the resulting routing. I have tried using small grids and assigning layers to 'any' direction, with some improvement. I would be encouraged with Electra if I could get 100% routing with adherance to my spacing rules. Any ideas or suggestions? Or does Electra shine on multi-layer stuff and this simple 2 layer board is under the Electra radar? Duane Foster > -----Original Message----- > From: edsi [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 21, 2004 10:40 AM > To: Protel EDA Forum > Subject: [PEDA] Autorouting Techniques > > > Hello All, > > Please feel free to visit www.konekt.com and read my white > paper on how to use the Electra Autorouter with Protel 99SE > and DXP products. I have been posting for some time now > that this router is one of the best products available. I > was asked by the ConnectEDA staff to write a paper for all > you users that are afraid to try autorouters. I have not > accepted any payment for this effort , my only interest is > have better design tools available and to open a new dialog > for Protel users. > > Enjoy the article > > Mike Reagan > EDSI > Frederick MD * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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/[EMAIL PROTECTED] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
