A simple way to have it use a single trace width for everything is to 
set the min trace width in the design rules.  In the DRC settings, go to 
  "sizes" tab, then set the minimum width.  The autorouter always 
complies with the DRC minimums.  You could set this to 10, say, do 
autoroute, then set it back to 8 so if you manually routed at 8 you 
won't get complaints when running the DRC on the board.

Also, if you want it to use smaller than default vias, set the minimum 
drill.  I use 16mils.  But you also have to change the "restring" - go 
to restring tab, and for vias, outer, I have 8mil minimum, 25%, 16mil 
maximum.  This makes vias with 16mil drills, the smallest size that 
doesn't require additional $ for pcb manufacturing.  And you can 
(usually) fit a 30awg wire-wrap wire in the hole as well for fixing 
design problems on prototypes later...

Hope it helps
J


Wouter van Ooijen wrote:
> [Eagle] Where can I specify the trace width the autorouter will use? It
> does not seem to use the default width (the one that is used when I draw
> a trace manually), and I don't see a setting in the autorouter
> configuration.
> 
> Wouter van Ooijen
> 
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
> docent Hogeschool van Utrecht: www.voti.nl/hvu
>  
> 
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