Re: gEDA-user: Hidden rectangle in PCB causing headaches

2006-08-24 Thread joeft

Hugo,

Thanks for filling in some other cases that the DRC might handle 
better.  In fact, we ran across the last case you describe below on this 
same design.


Joe

Hugo Elias wrote:

> We've just completed a board which had us scratching our heads when 
we ran the DRC.  We also found problems in the gerber output.



Hi Joe,

I've been having similar nightmares with the DRC. The other
problem is when you have 2 rectangles exactly touching
(with zero gap between them).

I have also thought about a couple of ways the DRC interface could
be improved. As far as I understand it, a DRC error is always between
exactly 2 objects? EG 2 track segments, or a via and a poly. Is
this correct?

So, basically, the user needs to be able to identify exactly which
two objects, even if they are invisible

1. It would be very helpful if the DRC could tell you in the log
which layer(s) the two offending objects were on.

2. instead of colouring in a whole load of things in green, and 
something in cyan. Why not outline the two objects with a dashed

outline or something. Then the user would immediately be able to see.

3. Instead of saying in the log "copper areas too close".  Why not say
something like "via too close to track" for example.

The other thing that can *really* get you is when a track is accidently
'joined' to a rectangle nearby, even though it doesn't look like it.
I.E. the track is between two other tracks which clear the rectangle,
but the rectangle overlaps the joined track.  This causes PCB to think
there's a short, even though there isn't.

Hugo Elias





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Re: gEDA-user: Hidden rectangle in PCB causing headaches

2006-08-24 Thread Hugo Elias



3. Instead of saying in the log "copper areas too close".  Why not say
something like "via too close to track" for example.
   



Or better still,
"via too close to track on layer 3"
 


perfect!

Hugo




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Re: gEDA-user: Hidden rectangle in PCB causing headaches

2006-08-24 Thread ldoolitt
On Thu, Aug 24, 2006 at 11:16:19AM +0100, Hugo Elias wrote:
> 
> 3. Instead of saying in the log "copper areas too close".  Why not say
> something like "via too close to track" for example.

Or better still,
"via too close to track on layer 3"

   - Larry


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Re: gEDA-user: Bill of Materials Script

2006-08-24 Thread John Luciani

On 8/24/06, Patrick Doyle <[EMAIL PROTECTED]> wrote:


Are the Freedog meetings announced anywhere?


Yes. On this list.


If not, do they follow a regular schedule of the 4th Wednesday of every month?


It is usually the first Wednesday or Thursday of the month. It changes based
on schedules. We happen to meet on Wednesday morning at 8AM because
Peter Long, from Cambridge University, was visiting.


IOW, I would like to attend a meeting, how does one obtain an invitation? :-)


Everyone is welcome.

Free Dog is an association of like-minded hackers and engineers
interested in free and open EDA tools. We hold monthly meetings near
MIT (and other locations) featuring informal networking, speakers, and
camaraderie. Our goals are to learn more about CAD, engineering and
scientific software, share ideas about our current projects, and --
most importantly -- have fun with like-minded people. We welcome new
members and participants of all ages.  Students are particularly
welcome.

(* jcl *)

--
http://www.luciani.org


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Re: gEDA-user: Hidden rectangle in PCB causing headaches

2006-08-24 Thread Hugo Elias
> We've just completed a board which had us scratching our heads when 
we ran the DRC.  We also found problems in the gerber output.



Hi Joe,

I've been having similar nightmares with the DRC. The other
problem is when you have 2 rectangles exactly touching
(with zero gap between them).

I have also thought about a couple of ways the DRC interface could
be improved. As far as I understand it, a DRC error is always between
exactly 2 objects? EG 2 track segments, or a via and a poly. Is
this correct?

So, basically, the user needs to be able to identify exactly which
two objects, even if they are invisible

1. It would be very helpful if the DRC could tell you in the log
which layer(s) the two offending objects were on.

2. instead of colouring in a whole load of things in green, and 
something in cyan. Why not outline the two objects with a dashed

outline or something. Then the user would immediately be able to see.

3. Instead of saying in the log "copper areas too close".  Why not say
something like "via too close to track" for example.

The other thing that can *really* get you is when a track is accidently
'joined' to a rectangle nearby, even though it doesn't look like it.
I.E. the track is between two other tracks which clear the rectangle,
but the rectangle overlaps the joined track.  This causes PCB to think
there's a short, even though there isn't.

Hugo Elias





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Re: gEDA-user: Bill of Materials Script

2006-08-24 Thread Patrick Doyle

On 8/23/06, John Luciani <[EMAIL PROTECTED]> wrote:

At the 23 August 2006 Freedog meeting we reviewed some output from my

Are the Freedog meetings announced anywhere?  If not, do they follow a
regular schedule of the 4th Wednesday of every month?

IOW, I would like to attend a meeting, how does one obtain an invitation? :-)
--wpd


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