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Autodesk EAGLE
EAGLE User Chat (English) Setting trace widths, etc. for Autorouter
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Forum Thread Details
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  • Replies 7 replies
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  • pcb_layout_rules
  • autorouter
  • eagle_pcb
Related

Setting trace widths, etc. for Autorouter

Former Member
Former Member over 12 years ago

Before letting autorouter run is there a way to set the power traces (e.g., 12V, GND) to a wider width than the signal traces? Also, is there also a setting that allows only 45 degree bends for traces?

Thanks,

Jeff

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  • Morosh
    0 Morosh over 12 years ago

    On 02/01/2013 21:59, Jeff Angcanan wrote:

    Before letting autorouter run is there a way to set the power traces (e.g., 12V, GND) to a wider width than the signal traces? Also, is there also a setting that allows only 45 degree bends for traces?

    Thanks,

    Jeff

     

    help --> class

     

     

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  • Former Member
    0 Former Member over 12 years ago

    Jeff,

     

    from experience I recommend not to leave the power traces (incl. GND) to the Autorouter. You better route them manually as the autorouter is definitetly not as intelligent as a human. It might be helpful if you check the option 'auto set route width and drill' in options/set/misc menu.

     

    Cheers,

     

    Mario

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  • shabaz
    0 shabaz over 12 years ago in reply to Former Member

    Agree, manual is ideal for power traces.

    One thing I've noticed with the class method - although it works very well, it does produce a warning at the ends of traces if the trace width would need to be smaller to reach a small device pin for example.

    This is a common thing, because many SMD parts are (say) 0.5mm spaced pins, and yet I would want certain tracks to be (say) 1mm in width for the most part, except as it approaches the SMD component.

    Maybe there should be an option in EAGLE that allows the class to be overridden for a certain length of track where the track is connecting to an SMD.

    This would mean the track is thinner close to the SMD, but usually this is not an issue if the length is short.

    It would be a nice feature enhancement (I'm still on an old EAGLE release however, so my info may be old).

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  • Former Member
    0 Former Member over 12 years ago in reply to Former Member

    Thanks for the tip Mario

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  • Former Member
    0 Former Member over 12 years ago in reply to shabaz

    Thank you Shabaz.

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  • Former Member
    0 Former Member over 10 years ago in reply to Former Member

    Did you ever figure out any tricks to solving your issue? Did any of the above advice work for you?

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  • e14candies
    0 e14candies over 10 years ago

    Eagle autorouter is also annoying in that it will waste/ignore available

    space...if 10 traces need routed in an area it will pack them right next to

    each other, even if that means leaving 500 mils of adjacent area completely

    unused. There should be an option to space apart the traces to avoid shorts

    or signal contamination when plenty of room remains (maximize spacing but

    allow a minimum clearance).  It's like shoving all of your furniture into

    one corner of an empty room.

    --

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

     

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