Post by thread:[PIC]: Eagle Auto route

Hi All ok.. I have a complex schematic and I want to do auto route. I start the auto route and the process begin the final result are too many unrouted tracks.. my question is: how I start a new auto route? playing with options/parameters don't give any better results deleting the board and start new board auto route force me to place the component in place again. what can I do to start auto route without all this mess? what are the differences in the direction signs? "/ \ * . |" if someone can explain in details I'll appreciate it. Regards Tal Bejerano AMC - ISRAEL -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

Use the Group tool to select all the traces in the board view, then use the Ripup tool, but RIGHT click the board, all the traces should revert to air-wires. Also reroute with the Routing Grid set to 10 (I think the default is 50, and that is usually too big). David Tal Bejerano - AMC wrote: {Quote hidden}> Hi All > > ok.. I have a complex schematic and I want to do auto route. > I start the auto route and the process begin > the final result are too many unrouted tracks.. > my question is: > how I start a new auto route? playing with options/parameters don't give any > better results > deleting the board and start new board auto route force me to place the > component in place again. > what can I do to start auto route without all this mess? > what are the differences in the direction signs? "/ \ * . |" > if someone can explain in details I'll appreciate it. > > Regards > > Tal Bejerano > AMC - ISRAEL > > -- > http://www.piclist.com hint: To leave the PICList > .....piclist-unsubscribe-requestKILLspam@spam@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu

> ok.. I have a complex schematic and I want to do auto route. > I start the auto route and the process begin > the final result are too many unrouted tracks.. > my question is: > how I start a new auto route? playing with options/parameters don't give any > better results > deleting the board and start new board auto route force me to place the > component in place again. > what can I do to start auto route without all this mess? > what are the differences in the direction signs? "/ \ * . |" > if someone can explain in details I'll appreciate it. To delete an existing route, use RIPUP ALL. Autorouting in general is a complicated subject, and the Eagle manual contains a reasonable bit of information on it. You really do need to read the manual. The autorouter is not intended to be an "idiot proof" feature. If you have too many unroutable traces, then you may need to reduce the track width closer to the PC house limit and make the routing grid finer. However, you can only throw so much brute force at it before the results will taper off. In the end a good layout is the most important single factor. If you've done all the right things and it's still not routable, then consider adding a layer or two (For example, there is no point to a 3 layer board. The board house will probably use a 4 layer process and charge you accordingly anyway.). So far I've been quite impressed by the Eagle autorouter. I've gotten it to 100% route all my boards, although I had to be an active participant, especially on the a couple of the tougher ones. I also use a lot more optimization passes with parameters varying from pass to pass. Although this has nothing to do with the routability (this is determined in the first pass), it can make a large difference in the number of vias. On a recent board, the first pass created over 1000 vias although the final route ended up using only 170. You won't get these kind of results using the Eagle defaults. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList .....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu

before reducing the dimension of the traces, you might try to change the directional organization of the routing. There are two menus (left up) with TOP and BOTTOM preferred direction. CHoose the star * and see how much it helps. Then start decreasing the number 50. Go to 30, 20 and below in steps of one... DO not choose a parameter too small (5 or 8) otherwise traces are too thin and close each other. Stefano Curtarolo {Quote hidden}> Use the Group tool to select all the traces in the board view, then use the > Ripup tool, but RIGHT click the board, all the traces should revert to > air-wires. Also reroute with the Routing Grid set to 10 (I think the default is > 50, and that is usually too big). > David > > Tal Bejerano - AMC wrote: > > > Hi All > > > > ok.. I have a complex schematic and I want to do auto route. > > I start the auto route and the process begin > > the final result are too many unrouted tracks.. > > my question is: > > how I start a new auto route? playing with options/parameters don't give any > > better results > > deleting the board and start new board auto route force me to place the > > component in place again. > > what can I do to start auto route without all this mess? > > what are the differences in the direction signs? "/ \ * . |" > > if someone can explain in details I'll appreciate it. > > > > Regards > > > > Tal Bejerano > > AMC - ISRAEL > > > > -- > > http://www.piclist.com hint: To leave the PICList > > EraseMEpiclist-unsubscribe-requestspam_OUTTakeThisOuTmitvma.mit.edu > > -- > http://www.piclist.com hint: To leave the PICList > piclist-unsubscribe-requestspam_OUTmitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList @spam@piclist-unsubscribe-requestKILLspammitvma.mit.edu

"David P. Harris" <KILLspamdpharrisKILLspamTELUS.NET> said: > Use the Group tool to select all the traces in the board view, then use the > Ripup tool, but RIGHT click the board, all the traces should revert to > air-wires. Also reroute with the Routing Grid set to 10 (I think the default is > 50, and that is usually too big). > David Here's an easier way - type "ripup;" (with the semicolon) in the Command box. Press enter and confirm that you want to rip up every track, then wait until EAGLE has finished nuking them. HTH. -- Phil. RemoveMEphilpemTakeThisOuTbigfoot.com http://www.philpem.btinternet.co.uk/ -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> Here's an easier way - type "ripup;" (with the semicolon) in the Command > box. Press enter and confirm that you want to rip up every track, then wait > until EAGLE has finished nuking them. Even easier, type RIPUP ALL, which I think can be abbreviated to "RIP ALL". ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

----- Original Message ----- From: "Tal Bejerano - AMC" <spamBeGonekooterspamBeGoneZAHAV.NET.IL> To: <TakeThisOuTPICLISTEraseMEspam_OUTMITVMA.MIT.EDU> Sent: Saturday, May 11, 2002 8:04 PM Subject: [PIC]: Eagle Auto route > Hi All > > ok.. I have a complex schematic and I want to do auto route. > I start the auto route and the process begin > the final result are too many unrouted tracks.. > my question is: > how I start a new auto route? playing with options/parameters don't give any > better results RIPUP; > deleting the board and start new board auto route force me to place the > component in place again. > what can I do to start auto route without all this mess? > what are the differences in the direction signs? "/ \ * . |" These tell the router what 'primary' direction to use for traces on a given layer. > if someone can explain in details I'll appreciate it. Try setting a finer grid: GRID 0.0125; or GRID 0.01 or GRID 0.005 Bob Ammerman RAm Systems -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> RIP UP All or Rip All doesn't work I get a message:" No name ALL" > but deleting with right button is not too difficult :-))) Sorry, I was going from memory and got it confused with different software. I just verified it in Eagle, and the original poster had it right. Type "RIP;". This pops up a dialog that says something like "I know this is what you want to do, but since you're just a dumb user you have to confirm that you really really want to delete all the traces so that they will be irrevocably be forever gone. So, are you truly really really sure you really want to blast your whole design, everything on the disk, and all papers on your desk, in the file cabinet, and withing 2 miles to oblivion?". Just hit ENTER, which defaults to YES. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics