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V6 Autoroute Problem

brohogan

Hi, I'm new here.

 

Since I switched to V6 many of the boards I made with V5.11 will no longer autoroute after they have been ripped up.

On V5.11 they autorouted 100%.

 

These boards are fairly complex and have a ground plane. There now seems to be a lot of open areas of the ground plane and lots of airwires.

I'm using the Sparkfun DRC and can't see anything that has changed other than the version of Eagle.

 

I would be surprised if the autorouter has changed that much, and hopefully it's a setting or something.

 

Any ideas or help is appreciated.

Thanks

  • 0

    John Giametti wrote:

    Hi, I'm new here.

     

    Since I switched to V6 many of the boards I made with V5.11 will no

    longer autoroute after they have been ripped up.

    On V5.11 they autorouted 100%.

     

    These boards are fairly complex and have a ground plane. There now

    seems to be a lot of open areas of the ground plane and lots of

    airwires.

    I'm using the Sparkfun DRC and can't see anything that has changed

    other than the version of Eagle.

     

     

    Hi  John

     

    The most likely culprit is the routing grid setting in the autorouter. Make

    it a little finer.

     

    HTH

    Warren

     

     

     

     

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  • 0 in reply to autodeskguest

    Thanks for your input Warren.

     

    I did try reducing the routing grid setting from 8mm all the way down to 2mm in steps. (I had time on my hands ;-)

    Still no luck - broken polygrams and air wires where there was none in v5.11.

     

    I guess they must have changed an algorithm or something. The differance is rather surprising. Too bad, I really like V6.

     

    I have no experiance in hand routing and the boards are fairly complex or tight. Doing it by hand seems rather daunting.

     

    Thanks again, though.

    John

  • 0 in reply to brohogan

    brohogan wrote:

    Thanks for your input Warren.

     

    I did try reducing the routing grid setting from 8mm all the way down

    to 2mm in steps. (I had time on my hands image

    Still no luck - broken polygrams and air wires where there was none in

    v5.11.

     

    I guess they must have changed an algorithm or something. The

    differance is rather surprising. Too bad, I really like V6.

     

    I have no experiance in hand routing and the boards are fairly complex

    or tight. Doing it by hand seems rather daunting.

     

    Thanks again, though.

    John

     

    --

    To view any images and attachments in this post, visit:

    http://www.element14.com/community/message/78928#78928

     

    2mm is a large routing grid in many instances. The routing grid you should

    use depends on the scale of your components. The size and pitch of the pins

    in your design will determine your routing grid requirements.  The manual

    does provide assistance here with guidance on choosing a routing grid pitch

    to facilitate autorouting between pins.

     

    If you have a DIL IC package in your design the pins are 2.54mm apart so if

    you want a trace between the pins a routing grid of 1.27mm would do you

    provided the IC pins are already on a 2.54mm (0.1") grid.

     

    All the best

    Warren

     

     

     

    --

    Viewed / responded via the newsgroup at

    news.cadsoft.de