kicad-developers team mailing list archive

[Jeff Young <jeff@xxxxxxxxx>]

Hi Wayne,

> On 18 Sep 2018, at 23:20, Wayne Stambaugh <stambaughw@xxxxxxxxx> wrote:
> 
> On 9/18/2018 7:20 AM, Jeff Young wrote:
>> When calculating obstacles we currently use the diff-pair gap as a
>> clearance between a diff-pair trace and a diff-pair pad.
>> 
>> I’m pretty sure that’s wrong.  I’m just not sure how wrong.
>> 
>> I suspect the diff-pair gap shouldn’t be used as a clearance /at all/.
>>  It’s the gap between the traces, not a clearance.
> 
> Why wouldn't you use the netclass clearance or the default netclass
> clearance if a netclass is not defined?  It seems to me that the gap has
> nothing to do with the clearances other than the gap between the diff
> pair traces.

Yes, that is indeed our conclusion.  I just wanted to make sure I wasn’t 
missing anything as the code was using the gap as a clearance.

Cheers,
Jeff.