Hi to everyone,
I read every post on forum that I have been able to find on this topic but without success.
I have a very unusual error in DRC, actualy a lot of those.
At the first glance, error is very decriptive and self explanatory: “Drilled holes too close together (board setup constraints min 0.4995 mm, actual 0.3765 mm)”
My first hypothesys was that KiCad calculates distance between walls of vias (0.581 - r1 / 2 -
r2 / 2). But even in this case distance would be 0.381 and not 0.3765. And also, I found many sources that claims that distance is “center to center”.
I am using version 7.0.1
So, I actualy don’t know whati is happening. What is the way that this distance is computed? Does anyone have the same problem? Or might it be an issue in KiCad itself?
That doesn’t make sense for manufacturability. Edge to edge (nearest edges, of course) are important because drilling doesn’t like an edge – be it another hole or board edge – nearby the edge of the drill bit. Two reasons: first, the other hole may bend and break the bit if they overlap. Second, a thin wall between holes may break. Naturally the diameter of the holes affects this and it doesn’t make sense to measure center to center.