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Home » CadSoft Support Forums » eagle.userchat.eng » Setting trace widths, etc. for Autorouter
Setting trace widths, etc. for Autorouter [message #148804] Wed, 02 January 2013 19:58 Go to next message
Jeff Angcanan
Messages: 6
Registered: January 2013
Junior Member
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
Re: Setting trace widths, etc. for Autorouter [message #148805 is a reply to message #148804] Wed, 02 January 2013 20:08 Go to previous messageGo to next message
Morosh
Messages: 138
Registered: October 2004
Senior Member
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
Re: Setting trace widths, etc. for Autorouter [message #148826 is a reply to message #148804] Fri, 04 January 2013 09:58 Go to previous messageGo to next message
Mario Blunk
Messages: 3
Registered: January 2013
Junior Member
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.

Cheers,

Mario
Re: Setting trace widths, etc. for Autorouter [message #148834 is a reply to message #148826] Fri, 04 January 2013 17:39 Go to previous messageGo to next message
shabaz
Messages: 190
Registered: October 2012
Senior 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).
Re: Setting trace widths, etc. for Autorouter [message #148835 is a reply to message #148826] Fri, 04 January 2013 17:44 Go to previous messageGo to next message
Jeff Angcanan
Messages: 6
Registered: January 2013
Junior Member
Thanks for the tip Mario
Re: Setting trace widths, etc. for Autorouter [message #148836 is a reply to message #148834] Fri, 04 January 2013 17:48 Go to previous messageGo to next message
Jeff Angcanan
Messages: 6
Registered: January 2013
Junior Member
Thank you Shabaz.
Re: Setting trace widths, etc. for Autorouter [message #160972 is a reply to message #148836] Wed, 20 May 2015 21:10 Go to previous messageGo to next message
Randy MARTINEZ
Messages: 2
Registered: May 2015
Junior 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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Re: Setting trace widths, etc. for Autorouter [message #160979 is a reply to message #148804] Thu, 21 May 2015 07:03 Go to previous message
eaglecandies
Messages: 186
Registered: September 2011
Location: Cincinnati
Senior Member
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.
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