--- In [email protected], Robert <birmingham_spi...@...> wrote: > > > My suggestion was to change the clearance class of your MLF footprints > > (not the clearance class of the new traces to route) to the new > > created clearance class MLF. > > Please read my previous answer again more carefully! > > After creating the new clearance class MLF change the matrix entry > > between the new created class MLF to the class default to a lower value. > > Then assign the new clearance class to your critical MLF footprint for > > example by selecting a rectangle around these footprints, then pushing > > the clearance button in the toolbar and selecting the new clearance > > class MLF in the sheet, that pops up. > > Yes, that's *exactly* what I did before my OP, and it doesn't work. > The reason it doesn't work is because the autorouter is trying to use > "kicad-default" traces to connect to the pins, and "kicad-default" uses > the "default" clearance. At the point where two adjacent pins are > connected to the tracks, the two tracks require "default"-"default" > clearance. Since that's 12 thou, only one of the tracks can be laid. > > I can understand why you might think what you suggest will work; I must > have been tinkering with this for an hour or more before the penny > dropped why it doesn't work. > > Regards, > > Robert. > I understand, I thought the width of your footprints would have been a lot bigger than the default trace width. In this case my suggestion would have worked. Actually the autorouter has also some automatic neckdown capability. But that does not seem to work either in your situation.
Regards, Alfons Alfons
