Traces with no round egde

autodeskguest over 17 years ago

Hi,

when using large traces their ends are rounded. This is a problem in

some smd situations.

For example, see this picture:

http://www.students.tut.fi/~kontkant/cont/ele-a3977/005-intro/telok3.png

Note the large traces at both high corners of the smd chip in the middle

of the pcb. The guy was able to connect them to the pad without. If I do

the same the edge will be rounded and this leads to shorts the nearest pad.

How to have sharp edges at the ends of a trace?

Thanks

Marco / iw2nzm

autodeskguest over 17 years ago

Marco Trapanese wrote:
Hi,

when using large traces their ends are rounded. This is a problem in
some smd situations.

For example, see this picture:

http://www.students.tut.fi/~kontkant/cont/ele-a3977/005-intro/telok3.png

Note the large traces at both high corners of the smd chip in the middle
of the pcb. The guy was able to connect them to the pad without. If I do
the same the edge will be rounded and this leads to shorts the nearest pad.

How to have sharp edges at the ends of a trace?

Thanks
Marco / iw2nzm
For any traces larger then 16 mil I use named polygon's.
see http://arcelectronicsinc.com/testinfo/eca-320polygons.png
The change Cap only works on arcs.
Paul R.
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autodeskguest over 17 years ago

Paul Romanyszyn ha scritto:

For any traces larger then 16 mil I use named polygon's.
see http://arcelectronicsinc.com/testinfo/eca-320polygons.png
The change Cap only works on arcs.

Polygons are a solution, indeed. I'm wondering why the cap style was not
added to the normal traces too. It would be nice to have several
endpoint styles. Perhaps there are disadvantages I can't see.

Thank you,
Marco / iw2nzm
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autodeskguest over 17 years ago

On Fri, 02 May 2008 06:16:07 +0200, Paul Romanyszyn
<pgr@arcelectronicsinc.com> wrote:

For any traces larger then 16 mil I use named polygon's.
see http://arcelectronicsinc.com/testinfo/eca-320polygons.png

How did you do this print? Not manually I hope?

Wouter
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autodeskguest over 17 years ago

Wouter Mense wrote:
On Fri, 02 May 2008 06:16:07 +0200, Paul Romanyszyn
<pgr@arcelectronicsinc.com> wrote:

For any traces larger then 16 mil I use named polygon's.
see http://arcelectronicsinc.com/testinfo/eca-320polygons.png

How did you do this print? Not manually I hope?

Wouter
Ordered boards and hand assembled the first 6 for testing.

Filled with ground highlighted.
http://arcelectronicsinc.com/testinfo/componentside.png

Filled with +5 highlighted
http://arcelectronicsinc.com/testinfo/plus5.png
Paul
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autodeskguest over 17 years ago

Hey Paul, I really like your layout style. You obviously do not use
auto-router. Beautiful, looks like something from NASA circa '67.

How are you able to get such nice curved traces? I have never been able to
achieve anything like that with Eagle.

Thanx for sharing,

Tony

"Paul Romanyszyn" <pgr@arcelectronicsinc.com> wrote in message
news:fvfauf$ok0$1@cheetah.cadsoft.de...
Wouter Mense wrote:
On Fri, 02 May 2008 06:16:07 +0200, Paul Romanyszyn
<pgr@arcelectronicsinc.com> wrote:

For any traces larger then 16 mil I use named polygon's.
see http://arcelectronicsinc.com/testinfo/eca-320polygons.png

How did you do this print? Not manually I hope?

Wouter
Ordered boards and hand assembled the first 6 for testing.

Filled with ground highlighted.
http://arcelectronicsinc.com/testinfo/componentside.png

Filled with +5 highlighted
http://arcelectronicsinc.com/testinfo/plus5.png
Paul
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esilviu over 17 years ago

hey, this is art, not electronics!

"Marco Trapanese" <marcotrapaneseNOSPAM@gmail.com> wrote in message
news:fvd4jq$kr8$1@cheetah.cadsoft.de...
Hi,

when using large traces their ends are rounded. This is a problem in some
smd situations.

For example, see this picture:

http://www.students.tut.fi/~kontkant/cont/ele-a3977/005-intro/telok3.png

Note the large traces at both high corners of the smd chip in the middle
of the pcb. The guy was able to connect them to the pad without. If I do
the same the edge will be rounded and this leads to shorts the nearest
pad.

How to have sharp edges at the ends of a trace?

Thanks
Marco / iw2nzm
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