Air wire problems

On 03/10/16 01:35, Karl Lautman wrote:

1.  When I run ratsnest it says I still have 11 air wires, but I can't see

them.  Is there any way to highlight them?  I assume they're little stubs

left over from my lame routing.

Sounds like they're little stubs within a pad or between two tracks that

already overlap. You could try temporarily turning off all layers apart

from the airwires, note positions (or mark them on an unused Doc layer)

before turning useful layers back on.

 

2.  In the attached image, what are those gray hatched circles at the top?

I assume they're related to vias I placed and later ripped up (they're in

the middle of a trace I've turned off to make them visible), but I can't

get them to go away, either with ripup or delete (which generates an

error).  How can I get rid of them?  I was going to ask about the odd air

wire going off to the right, but I fixed it.

 

Could they be left-over DRC error markers? The shape looks like the

overlap of two not-quite-concentric vias.

You could try temporarily turning off all layers

Great idea.  Thanks.

Could they be left-over DRC error markers?

Possibly. Any idea how to get rid of them?

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

On 03.10.2016 08:24, Karl Lautman wrote:

Could they be left-over DRC error markers?

 

Possibly. Any idea how to get rid of them?

re-run DRC, or type "errors clear"

On Sun, 02 Oct 2016 20:35:12 -0400, Karl Lautman <karl@lautman.com>

wrote:

1.  When I run ratsnest it says I still have 11 air wires, but I can't see

them.  Is there any way to highlight them?  I assume they're little stubs

left over from my lame routing.

First thing I do is set the airwire color to bright magenta.  That

seems to be the most visible color against Eagle's background.

Next, turn off the visibility of the routed layers and look for little

pink dashes and lines on your screen.  Turn the layers back on, one at

a time to find the affected area.

Realize that Eagle's routing and airwire detection is really

stoooopid.  For example, if I lay down some copper and then put 4 vias

in the square touching each other and obviously connected, Eagle has

no clue.  It flags air wires until I route (invisible) wires between

the vias, give the copper the desired signal name and optionally

connect it to where it needs to go.

I use this technique to say, connect 4 current shunts in parallel.

Easily drawn.  Difficult to satisfy Eagle.

John

John DeArmond

http://www.neon-john.com

http://www.tnduction.com

Tellico Plains, Occupied TN

See website for email address

Next, turn off the visibility of the routed layers

Yup, that's what I ended up doing.  Works great for finding the little

stubs of airwires, but actually eliminating them, as you point out, can be

infuriating. 

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Karl Lautman wrote:

1.  When I run ratsnest it says I still have 11 air wires, but I can't see

them.  Is there any way to highlight them?  I assume they're little stubs

left over from my lame routing.

try this ULP:

#usage " 0) {

      string cmd;

      sprintf(cmd, "window (%.1fmic %.1fmic) (%.1fmic %.1fmic);",

                            u2mic(X1[sel]), u2mic(Y1[sel]),

                                              u2mic(X2[sel]),

u2mic(Y2[sel])

             );

      switch (ret) {

        case 1:

        case 3:

          sprintf(s, "run listUnrouted %d;", sel + 1);

          cmd += s;

          break;

        case 2:

          cmd += "show @ " + Name[sel];

          break;

      }

      exit(cmd);

    }

  }

  else

    dlgMessageBox("no unrouted segments found!");

} // if board

--

Lorenz

Thanks, Lorenz, but I solved the problem by turning off every layer except

airwires, then zooming in on the stubs.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Karl,

Rob, Morten, and Lorenz all had some very good ideas on how to find such

air wires.

There is a different method, however, that seems to work best for me.

Perhaps it will suit you as well.

From the board editor, click Options -> Set -> Misc.  Set the catch

factor to 0.

This allows you to start a route from anywhere on (or off) the board.

The nearest air wire will be picked up.  Moving the cursor around some

will allow one to identify the closest end of the nearest air wire.

Morten is correct in how to get rid of the DRC markers.  Getting rid of

the air wires, though, can only be done by routing each.

HTH,

    - Chuck

On 10/02/2016 08:35 PM, Karl Lautman wrote:

1.  When I run ratsnest it says I still have 11 air wires, but I can't see

them.  Is there any way to highlight them?  I assume they're little stubs

left over from my lame routing.

 

2.  In the attached image, what are those gray hatched circles at the top?

I assume they're related to vias I placed and later ripped up (they're in

the middle of a trace I've turned off to make them visible), but I can't

get them to go away, either with ripup or delete (which generates an

error).  How can I get rid of them?  I was going to ask about the odd air

wire going off to the right, but I fixed it.

 

Thanks

Thanks, Chuck.  I don't have that option, though I'm on v4.16, so maybe it

came out later.  I keep thinking about upgrading, but this version seems to

do everything I need, so it gets pushed off.  Anyway, I was able to solve

my problem by turning off all layers except airwires.  I could find even

tiny ones that way.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.