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Auto-router stops after very few traces

autodeskguest

Hello,

 

Not that I want to do layouts myself but I wanted to see what the

autorouter would do with a rather simple two-layer board. Well, after

running a few top-layer traces it just quit. No warning, nothing. It

didn't even touch the bottom layer. Just curious: Why does it stall

without any messages?

 

--

Regards, Joerg

 

http://www.analogconsultants.com/

 

Parents

  • On 2/25/08 9:57 PM, in article fpvv6u$116$1@cheetah.cadsoft.de, "Joerg"

    <notthisjoergsch@removethispacbell.net> wrote:

     

    Hello,

     

    Not that I want to do layouts myself but I wanted to see what the

    autorouter would do with a rather simple two-layer board. Well, after

    running a few top-layer traces it just quit. No warning, nothing. It

    didn't even touch the bottom layer. Just curious: Why does it stall

    without any messages?

     

    Hi Joerg,

     

    Sounds to me like the routing grid.  This is the grid that the router will

    place traces on.  If it is larger than the pitch of parts you have then it

    won't be able to even get to a pin on that package.  I usually set it to 1/2

    of the trace spacing.  But if it gets too small it will make the routing

    take forever.

     

    James.

     

    --

    James Morrison

    www.eagletoolkit.com

    Long-time EAGLE User and EAGLE Enterprise Toolkit Author

     

     

     

Reply

  • On 2/25/08 9:57 PM, in article fpvv6u$116$1@cheetah.cadsoft.de, "Joerg"

    <notthisjoergsch@removethispacbell.net> wrote:

     

    Hello,

     

    Not that I want to do layouts myself but I wanted to see what the

    autorouter would do with a rather simple two-layer board. Well, after

    running a few top-layer traces it just quit. No warning, nothing. It

    didn't even touch the bottom layer. Just curious: Why does it stall

    without any messages?

     

    Hi Joerg,

     

    Sounds to me like the routing grid.  This is the grid that the router will

    place traces on.  If it is larger than the pitch of parts you have then it

    won't be able to even get to a pin on that package.  I usually set it to 1/2

    of the trace spacing.  But if it gets too small it will make the routing

    take forever.

     

    James.

     

    --

    James Morrison

    www.eagletoolkit.com

    Long-time EAGLE User and EAGLE Enterprise Toolkit Author

     

     

     

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