I 'am using Eagle 5.11
In my layout I have many traces with WIDTH of 0.2mm.
Now I would like to change all that wires in WIDTH 0.15mm.
I know I can do that with the command CHANGE and GROUP but is there an
other way ?
With GROUP some other wires ( for example WIDTH of 0.5mm ) change too.
THANKS
On 2/8/2011 11:22 PM, Tilmann Reh wrote:
Gary Gofstein schrieb:
>>> In my layout I have many traces with WIDTH of 0.2mm.
>>> Now I would like to change all that wires in WIDTH 0.15mm.
>>
>> Also, you should look into classes, by assigning nets to a certain
>> class, you can control width and clearance for that class. that way your
>> hi current or power nets don't need to change with your signal nets.
>> maybe this is what you are really looking for.
I don't think so:
- Modifying classes does not change anything that is already routed;
- Class widths are used /only/ by the autorouter and have absolutely no
effect when routing manually.
Tilmann
Yes, I was wondering if maybe the OP was really after a way to control
the widths as he was doing the board, since he mentioned "other ways".
That's why I said "look into" classes, because it is not clear if it
solves his problem or not, but may be useful to him.
As an aside, wouldn't it be better if the manual router used the net
class information to preload the width of the traces? I never actually
noticed that it doesn't. Maybe that's why I stopped using net classes 
On 2/8/2011 11:22 PM, Tilmann Reh wrote:
Gary Gofstein schrieb:
>>> In my layout I have many traces with WIDTH of 0.2mm.
>>> Now I would like to change all that wires in WIDTH 0.15mm.
>>
>> Also, you should look into classes, by assigning nets to a certain
>> class, you can control width and clearance for that class. that way your
>> hi current or power nets don't need to change with your signal nets.
>> maybe this is what you are really looking for.
I don't think so:
- Modifying classes does not change anything that is already routed;
- Class widths are used /only/ by the autorouter and have absolutely no
effect when routing manually.
Tilmann
Yes, I was wondering if maybe the OP was really after a way to control
the widths as he was doing the board, since he mentioned "other ways".
That's why I said "look into" classes, because it is not clear if it
solves his problem or not, but may be useful to him. Rereading my post,
I could be interpreted to say that this method will work for him for his
current problem, which is not true, in any case, the effort to classify
the nets exceeds the effort to just change their width individually.
As an aside, wouldn't it be better if the manual router used the net
class information to preload the width of the traces? I never actually
noticed that it doesn't. Maybe that's why I stopped using net classes 
Maybe it would be good to be able to GROUP, highlight, ripup, or
autoroute by CLASS - rather than net name as well.
On 2/8/2011 11:22 PM, Tilmann Reh wrote:
Gary Gofstein schrieb:
>>> In my layout I have many traces with WIDTH of 0.2mm.
>>> Now I would like to change all that wires in WIDTH 0.15mm.
>>
>> Also, you should look into classes, by assigning nets to a certain
>> class, you can control width and clearance for that class. that way your
>> hi current or power nets don't need to change with your signal nets.
>> maybe this is what you are really looking for.
I don't think so:
- Modifying classes does not change anything that is already routed;
- Class widths are used /only/ by the autorouter and have absolutely no
effect when routing manually.
Tilmann
Yes, I was wondering if maybe the OP was really after a way to control
the widths as he was doing the board, since he mentioned "other ways".
That's why I said "look into" classes, because it is not clear if it
solves his problem or not, but may be useful to him. Rereading my post,
I could be interpreted to say that this method will work for him for his
current problem, which is not true, in any case, the effort to classify
the nets exceeds the effort to just change their width individually.
As an aside, wouldn't it be better if the manual router used the net
class information to preload the width of the traces? I never actually
noticed that it doesn't. Maybe that's why I stopped using net classes
Maybe it would be good to be able to GROUP, highlight, ripup, or
autoroute by CLASS - rather than net name as well.
"Gary Gofstein" <nospam@use.forum.net> a écrit dans le message de news:
ij1pl0$3k3$1@cheetah.cadsoft.de...
On 2/8/2011 11:22 PM, Tilmann Reh wrote:
>> Gary Gofstein schrieb:
>>
>>>> In my layout I have many traces with WIDTH of 0.2mm.
>>>> Now I would like to change all that wires in WIDTH 0.15mm.
>>>
>>> Also, you should look into classes, by assigning nets to a certain
>>> class, you can control width and clearance for that class. that way your
>>> hi current or power nets don't need to change with your signal nets.
>>> maybe this is what you are really looking for.
>>
>> I don't think so:
>> - Modifying classes does not change anything that is already routed;
>> - Class widths are used /only/ by the autorouter and have absolutely no
>> effect when routing manually.
>>
>> Tilmann
Yes, I was wondering if maybe the OP was really after a way to control the widths as he was doing
the board, since he mentioned "other ways". That's why I said "look into" classes, because it is
not clear if it solves his problem or not, but may be useful to him. Rereading my post, I could
be interpreted to say that this method will work for him for his current problem, which is not
true, in any case, the effort to classify the nets exceeds the effort to just change their width
individually.
As an aside, wouldn't it be better if the manual router used the net class information to preload
the width of the traces? I never actually noticed that it doesn't. Maybe that's why I stopped
using net classes
In Options > Settings > Misc, there is a parameter for that:
[] Auto set route width and drill
Maybe it would be good to be able to GROUP, highlight, ripup, or autoroute by CLASS - rather than
net name as well.
"Gary Gofstein" <nospam@use.forum.net> wrote in message
news:ij1pl0$3k3$1@cheetah.cadsoft.de...
As an aside, wouldn't it be better if the manual router used the net class
information to preload the width of the traces? I never actually noticed
that it doesn't. Maybe that's why I stopped using net classes
I guess this should happen when you click the route icon (or type route) the
same way as the layer you start routing gets visible (if it's disabled). I
have missed that (although its a suggest topic, rather than support).
Of course when routing is activated, you may change the width as you wish .
I also wish net classes had different width range selections for each layer,
so that it can be used to DRC check for track impedance issues.
Ive somewhat implemented this in my own DRC checker (written in ULP), where
I embed the layer specific stuff into the class name. Here is an example:
class1
name="LVDS100:strict:skew=0.127:1=0.0991/0.2:3=0.0762/0.2:5=0.0762/0.2:7=0.0762/0.2:9=0.0813/0.2:16=0.0991/0.2"
This tells my ULP to check class1 lvds signals for:
"strict" says its not allowed on other layers than specified here
skew=0.127mm
layer1,16 with=0.0991,spacing 0.2
layer3,5,7 with=0.0762,spacing 0.2
Hopefully this will be obsolete when v6 comes out 
Christian Bohrer wrote on Fri, 11 February 2011 01:24
<snip>
As an aside, wouldn't it be better if the manual router used the
net class information to preload
the width of the traces? I never actually noticed that it doesn't.
Maybe that's why I stopped
using net classes
In Options > Settings > Misc, there is a parameter for that:
[] Auto set route width and drill
When did that sneak in there? I've often had the same thought about net
classes and manual routing. But it seems difficult to implement, knowing
when to use the default and when to use any overrides by the user.
I'll give it a try next time I route....
James.
--
James Morrison ~~~ Stratford Digital
Specializing in CadSoft EAGLE
Online Sales to North America
Electronic Design Services
EAGLE Enterprise Toolkit
--
Web access to CadSoft support forums at www.eaglecentral.ca. Where the CadSoft EAGLE community meets.
James Morrison wrote:
>> In Options > Settings > Misc, there is a parameter for that:
>> [] Auto set route width and drill
>
When did that sneak in there? I've often had the same thought about
net classes and manual routing. But it seems difficult to implement,
knowing when to use the default and when to use any overrides by the
user.
I'll give it a try next time I route....
Seems it came with v5.5 according to the Update notes
I tried it and it seems very usable. I did have a few "operator problems"
when using the Shift key to continue a trace with the last used width. I
found I kept my finger on the shift key so at the next wire end I would end
up placing a via. It was a bit alarming the first time it happened as the
via layer was hidden so it took some moments to determine why I had airwires
poking out all over the place. 
Warren
