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Eliminate 90 degree bends

Former Member

I'm trying to eliminate 90 degree bends (actually the corners) in traces

with the autorouter. I've played around with the settings for mnExtdStep

and cfExtdStep but either I have not come up with the correct

combination or I should be making the changes in another area as I still

get 90 degree corner bends. Anyone have any advice?

 

  • Mike Hart schrieb:

    Anyone?

     

    I'm trying to eliminate 90 degree bends (actually the corners) in traces

    with the autorouter. I've played around with the settings for mnExtdStep

    and cfExtdStep but either I have not come up with the correct

    combination or I should be making the changes in another area as I still

    get 90 degree corner bends. Anyone have any advice?

     

     

    IMHO cfExtdStep and mnExtdStep are not appropriate for this purpose.

    They are meant to avoid 45 degree bends in the layout.

     

    What you could try is to modify cfDiagStep and cfOrthStep:

    They are set to 3 (Diag) and 2 (Orth). This means that a diagonal

    step (45 degrees) costs 3 credits. The same step in orthogonal

    (for example one step left und one step up) would cost 4 credits.

    The Autorouter basically will prefer the 45 degree step, but there

    are lots of environmental effects that will cause hom to use

    90 degrees steps.

    Try to increase cfOrthStep carefully to make these steps more

    expensive. This might help.

     

     

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    Richard Hammerl

    CadSoft Support -- hotline@cadsoft.de

    FAQ: http://www.cadsoft.de/faq.htm