Re: [PEDA] Keepouts on Planes

2004-04-29 Thread Peter Bennett
Ray Mitchell wrote:

Hello,

I would like my various planes to be back 50mil from the edges of the 
PCB. I placed a line on the keepout layer and set my clearance 
constraint to 50mils.  While this does keep the autorouter from placing 
anything closer than 50mils from the edge, when I look at the Gerbers 
for the various planes it appears that they go right up to the edge and 
ignore the keepout.  What is the correct procedure?

Thanks,
Ray Mitchell
You have to place a track around the edges of your board, on the plane layers, 
otherwise the planes extend to the edge of the universe.  :-)

I would either place a 100 mil track centered on the board edge, or a 50 mil 
track 25 mils inside the edge.

--
Peter Bennett
TRIUMF
4004 Wesbrook Mall, Vancouver, BC, Canada
GPS and NMEA info and programs:
http://vancouver-webpages.com/peter/index.html




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Re: [PEDA] Keepouts on Planes

2004-04-29 Thread Jon Elson


Ray Mitchell wrote:

Hello,

I would like my various planes to be back 50mil from the edges of the 
PCB. I placed a line on the keepout layer and set my clearance 
constraint to 50mils.  While this does keep the autorouter from 
placing anything closer than 50mils from the edge, when I look at the 
Gerbers for the various planes it appears that they go right up to the 
edge and ignore the keepout.  What is the correct procedure?
The power planes are not objects to Protel, they are a lack of object. 
You need to draw
either a track or a fill to cut these planes back from the edges.  I use 
a wide track that partially
extends past the routed edge of the board, so the board will be cut 
through that track,
where there won't be any copper on the power planes.  The keepout just 
prevents the autorouter
from placing components, pads or vias in that region, which is fine, as 
far as it goes.

Jon



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