Re: gEDA-user: PCB Autorouter Status?

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

Hit "o"  done it has no effect on the issue.

Lots of surface mount parts but none off of the 90 degree angles.

I was hoping there would be an easy answer and fearing there isn't.


Looks like the conditions for a stale rats nest are that for a given
rats nest line the function FindRouteBoxOnLayerGroup returns a null
value for at least one end point.


Lets step back.


I have created a schematic using gschem.

generated a net list

constructed all the needed footprints

placed them into pcb and loaded the netlist I have no missing components

I hand routed the power and ground planes 

rerun rats nest optimization

put copper rectangles around the board on three signal layers to
restrict the autorouter

This will be a six layer board with a likely stackup of
  signal / ground / signal/ power1/ power2 / signal

the pcb layers enabled are

component
solder
gnd
power1
signal1
power2
silk
rat lines
pins/pads
vias
far side

rerun rats net opt.... no shorts no complaints 582 rat lines remaining

then doesn't matter if i select one rat line or all I get the stale rats
nest message

Is there something I am supposed to be doing in setting up the layers?
SO far all I have done from the standard pcb setup is to rename one of
the layers to power2


Thanks,

Steve Meier


On Thu, 2008-05-01 at 15:22 -0400, DJ Delorie wrote:
> I know of two reasons why this happens:
> 
> 1. Hit "o" to optimize the rats nest.
> 
> 2. You have SMD parts rotated to non-90 angles.
> 
> The autorouter is (or at least should be) 100% independent of the HID.



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