VIAS in Protel 2004

[Andi]

Hello,
How tell the Autorouter does not place vias under a component,but route a
track (top and bottom layer) is permitted.
bye

 

[David]

On Tue, 14 Dec 2004 13:06:32 +0100, Andi wrote:

Hello,
How tell the Autorouter does not place vias under a component,but route a
track (top and bottom layer) is permitted.
bye

A way to do this might be to create a new plane and add copper (tracks,
fills, polygons or whatever) to the areas where you don't want vias, and
lock the tracks. The autorouter will be able to route past the copper on
other planes, but it can't add a via without causing a short-circuit.
Once the routing is finished, simply remove the extra plane.

 

[Andi]

thanks

"David" <david.nospam@westcontrol.removethis.com> wrote in message
newsan.2004.12.14.14.24.17.108000@westcontrol.removethis.com...

On Tue, 14 Dec 2004 13:06:32 +0100, Andi wrote:

Hello,
How tell the Autorouter does not place vias under a component,but route
a
track (top and bottom layer) is permitted.
bye

A way to do this might be to create a new plane and add copper (tracks,
fills, polygons or whatever) to the areas where you don't want vias, and
lock the tracks. The autorouter will be able to route past the copper on
other planes, but it can't add a via without causing a short-circuit.
Once the routing is finished, simply remove the extra plane.

 

[Geo]

On Tue, 14 Dec 2004 13:06:32 +0100, "Andi" <andreas.lindl@mch.siemens.de> wrote:

How tell the Autorouter does not place vias under a component,but route a
track (top and bottom layer) is permitted.

Just wondering... why would you want to do this?

Geo

 

[Leon Heller]

"Geo" <hy1k-hwia@dea.spamcon.org> wrote in message
news:241ur0t8oon0ku3i48vddlhco1mlosk7r3@4ax.com...

On Tue, 14 Dec 2004 13:06:32 +0100, "Andi" <andreas.lindl@mch.siemens.de
wrote:

How tell the Autorouter does not place vias under a component,but route a
track (top and bottom layer) is permitted.

Just wondering... why would you want to do this?

It can be useful with prototypes if you think you might have to cut tracks
and do some rewiring.

Leon

 

[Boris Mohar]

On Tue, 14 Dec 2004 15:20:07 GMT, Geo <hy1k-hwia@dea.spamcon.org> wrote:

On Tue, 14 Dec 2004 13:06:32 +0100, "Andi" <andreas.lindl@mch.siemens.de> wrote:

How tell the Autorouter does not place vias under a component,but route a
track (top and bottom layer) is permitted.

Just wondering... why would you want to do this?

Geo

I was once chewed out by a junior eng for placing vias under components.
His reasoning was that he "wanted to use them as test points and to insure
the continuity of the circuit thorough the board" I replied that I would
oblige as soon as he took the revised cost estimate and his reasoning to his
boss. Vias stayed.



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/

 

[Spehro Pefhany]

On Tue, 14 Dec 2004 19:22:24 -0000, the renowned "Leon Heller"
<leon_heller@hotmail.com> wrote:

"Geo" <hy1k-hwia@dea.spamcon.org> wrote in message
news:241ur0t8oon0ku3i48vddlhco1mlosk7r3@4ax.com...
On Tue, 14 Dec 2004 13:06:32 +0100, "Andi" <andreas.lindl@mch.siemens.de
wrote:

How tell the Autorouter does not place vias under a component,but route a
track (top and bottom layer) is permitted.

Just wondering... why would you want to do this?

It can be useful with prototypes if you think you might have to cut tracks
and do some rewiring.

Leon

It's a standard feature in Orcad- you just create a via keepout
obstacle.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Andrei Minaev]

"David" <david.nospam@westcontrol.removethis.com> wrote in message
newsan.2004.12.14.14.24.17.108000@westcontrol.removethis.com...

On Tue, 14 Dec 2004 13:06:32 +0100, Andi wrote:

Hello,
How tell the Autorouter does not place vias under a component,but route a
track (top and bottom layer) is permitted.
bye

A way to do this might be to create a new plane and add copper (tracks,
fills, polygons or whatever) to the areas where you don't want vias, and
lock the tracks. The autorouter will be able to route past the copper on
other planes, but it can't add a via without causing a short-circuit.
Once the routing is finished, simply remove the extra plane.

Not nesessarily the bars should be in the copper (plane or routing) layers.
You may specify keepouts in any non-routing areas, say, Mechanicalxx. Then
just add a new clearance rule like a clearance between objects Via and
(IsKeepout And OnMechanical). You will be able to keep these bars in your
component footprints, and control via placement by turning on and off your
clearance rules.