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autorouting setup

Former Member

Hi,

 

Where can I find a tutorial about autorouting configurations ?  I don´t

understand many of parameters in autoroute menu.

 

Cost:

====

Via, NonPref, ChangeDir, OrthStep, DiagStep, ExtdStep, BonusStep, MalusStep,

PadImpact, SmdImpact, BusImpact, Hugging, Polygon

 

Maximum:

========

Via, Segments, ExtdSteps, RipupLevel, RipupSteps, RipupTotal

 

 

How does each of these parameters affect autorouting process ?

 

How are the relationship beetween paramerters ?

 

 

Regards,

 

Leandro

 

 

 

Parents

  • normally they do not need to be changed. if your board will not route it

    is likely due to issues of the placement and routing grids beings too

    coarse.

     

    the parameters indicate the what "cost" each of the routing entities

    uses, the router will try to minimize the total cost of the board. you

    will note that there are many passes with some different emphasis that

    try to give you a nice board. this is characteristic of most "simulated

    annealing" type optimizers, so perhaps EAGLE uses this as its algorithm.

     

    in general, if your board routes 100% or reasonably close to it, you

    would not need to alter the costs. rather spend your precious time

    manually "cleaning up" any awkward results from the autorouter.

     

    most problems i've seen with autorouting are the result of the

    aforementioned grid or layer setup problems.

     

Reply

  • normally they do not need to be changed. if your board will not route it

    is likely due to issues of the placement and routing grids beings too

    coarse.

     

    the parameters indicate the what "cost" each of the routing entities

    uses, the router will try to minimize the total cost of the board. you

    will note that there are many passes with some different emphasis that

    try to give you a nice board. this is characteristic of most "simulated

    annealing" type optimizers, so perhaps EAGLE uses this as its algorithm.

     

    in general, if your board routes 100% or reasonably close to it, you

    would not need to alter the costs. rather spend your precious time

    manually "cleaning up" any awkward results from the autorouter.

     

    most problems i've seen with autorouting are the result of the

    aforementioned grid or layer setup problems.

     

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