Keep in mind that the total width of all the spokes (assuming they’re all the same length) doesn’t control the current they’ll carry, only how hot they will get for a given current. Most boards are designed with a huge margin of error here.
It’s correct that would could do all the calculations automatically (both for heat-transfer during soldering and heat-generation during use), but it would be glacially slow. Cheers, Jeff. > On 8 Jul 2019, at 18:04, Eeli Kaikkonen <eeli.kaikko...@gmail.com> wrote: > > > > ma 8. heinäk. 2019 klo 19.04 Evan Shultz (evan.shu...@gmail.com > <mailto:evan.shu...@gmail.com>) kirjoitti: > Because of varying pad shapes, sometimes "+" spokes are best and other times > "x" may be preferred. So having a choice of those options, even though both > have the same number of thermal spokes, may be desirable. I believe this is > captured in the "initial angle" concept, but IMO having the choice of "+", > "x", "8 way", and "solid" is more obvious that picking an initial angle. But > perhaps I misunderstood. > > What I have felt need for is automatically finding locations for spokes so > that when a pad isn't fully surrounded by a zone it would still be connected > with 4 (or as many as possible) spokes. Sometimes changing the direction > between x and + would be enough, sometimes adding spokes from x to spokes of > +. For example N(orth), NW, W, SW instead of just N and W. Because adding > spokes is automatic anyways, exact positioning isn't important. There should > be as much copper as possible (and preferably in many directions) while still > having the thermal effect. Even the thicknesses of the individual spokes > could be calculated automatically to meet the requirements. What counts is > the total width of all the spokes together, or am I wrong? > > Eeli Kaikkonen > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : kicad-developers@lists.launchpad.net > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp
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