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maximizing autorouting

e14 Contributor

Using Eag;le 6.4   I noticed in many cases the autorouting packs traces

CLOSE together, even though plenty of room is avalable, such as 3 parallel

traces very close to a row of dip pins, even though there may be 300 mils

of free & unused space available.  It does "legally" meet a 10 or 15 mil

clearance, however it would be preferable to use a wider separation IF

POSSIBLE, with the clearance setting as the LOWEST POSSIBLE limit.

 

Is there a way to force the traces to be SPREAD over the available area,

rather than bunched together?  Setting the clearance higher is not the

answer, since in some cases there is no extra room & the tight clearance is

needed.

 

I looked around for great details & description of the autorouter, but

found none,...where are all these settings described?  I did HELP on

autorouter and get basically nothing (useful):

 

The integrated Autorouter can be started from a board window with the AUTO

command.

The Autorouter is also used as "Follow-me" router in the ROUTE command.

Please check your license to see whether you have access to the Autorouter

module.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

 

  • in reply to e14 Contributor

    On 3/5/2013 10:20 PM, Hoyt wrote:

    Is it possible to somehow at least set up a desired or target separation

    (say 100 mils) and specify an absolute minimum allowable (say 10 mils)?

     

     

    Hi Hoyt,

     

    I'm afraid the level of control you're trying to achieve in EAGLE's

    autorouter is not possible at the moment. EAGLE's autorouter is a grid

    based almost brute-force search algorithm, it doesn't have anything in

    which you can define an explicit spread.

     

    Perhaps in a future release there will be improvements in this respect.

     

    Best Regards,

    Jorge Garcia

     

  • in reply to e14 Contributor

    Is it possible to somehow at least set up a desired or target separation

    (say 100 mils) and specify an absolute minimum allowable (say 10 mils)?

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

  • this is what I was referring to, the preferred clearance, for toporoute

    product:

     

    Ability to assign minimal and preferred clearance for each net

    A user can immediately define the technical possibility of routing the

    board within the limits of the specified number of layers, specified

    clearance and other technical limitations based on the routing density and

    the amount of technical constraints violations.

     

    link to more info:

    http://www.toporouter.com/index.php

     

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

  • I see the autorouter is more fully described in the manual, rather than the

    built-in help (basically  minimal help)....I still don't yet have an answer

    to my original question about traces being overly unneccessarily packed

    together.

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.