end of trace rounding

RE: end of trace rounding

shabaz — Thu, 18 Apr 2013 15:14:25 GMT

Hi Paul,

Good point, that works well for a few major traces.

@Norm, An example is below using the polygon method.

If you want to reduce a track width, select the 'route manually' icon

on the left side icons, and then click on a yellow wire, and then left-clicking to route it until you reach close to the pad,

then go to the top and change width, and then finally click inside the pad to end the yellow wire.

As drawn:

What it looks like:

RE: end of trace rounding

dukepro — Thu, 18 Apr 2013 15:02:05 GMT

On 04/18/2013 09:53 AM, Hoyt wrote:

Polygons might works, but that would be quite a job to "draw" all the
traces, especially since they are not striaight lines,

As far as reducing width near the end, how do you pick what portion is to
be narrower? If I click on change width, it makes a who;le section
narrowr, say the trace was a 5 inch straigh line---do you require it to
have a bend to do this? I really don't want to reduce it until its on the
pad

You have to break the trace using the SPLIT command. Just add another

vertex some short distance away from the pin. Make sure it's not

colinear with the remaining trace otherwise it will be optimized out.

Then reduce the width of the short stub, and move the vertex to your

desired distance away from the pin. Since the width of the trace is

different, it will not optimize the vertex out even if the two traces

are colinear.

HTH,

- Chuck

RE: end of trace rounding

e14candies — Thu, 18 Apr 2013 13:53:46 GMT

Polygons might works, but that would be quite a job to "draw" all the

traces, especially since they are not striaight lines,

As far as reducing width near the end, how do you pick what portion is to

be narrower? If I click on change width, it makes a who;le section

narrowr, say the trace was a 5 inch straigh line---do you require it to

have a bend to do this? I really don't want to reduce it until its on the

pad

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

RE: end of trace rounding

autodeskguest — Thu, 18 Apr 2013 13:37:00 GMT

On 04/18/2013 06:33 AM, shabaz wrote:

Hi Norm,

I've had the same issue in the past. The only way I know is to just
reduce the track thickness manually (see example image below), as you
approach very close to the pad.

I use polygons for power and ground traces. DRC takes care of clearances

so you don't have to be exact.

Paul R

RE: end of trace rounding

shabaz — Thu, 18 Apr 2013 10:33:25 GMT

Hi Norm,

I've had the same issue in the past. The only way I know is to just reduce the track thickness manually (see example image below), as you

approach very close to the pad.

Ideally, it would be good if EAGLE would automatically reduce the thickness, and have a way not to cause a DRC error (since typically, the

thick tracks would have a class) as long as the track is only thin to within x mil (i.e. it should be configurable) distance of the pad.

Note: this is with v5, perhaps v6 has an enhancement in this area.

You can see a type of example here (which is a partially laid out board). In this case, the fat tracks were not for current

capability but for controlled impedance, but I need to make them narrower as they approach close to the pads, otherwise they would not fit.