Hi! I need with the PCB layout. I keep getting this error “Annular width (board setup constrains min annular width 0,2000mm; actual 0,1000mm)” no matter what I tried so far. I opened “Board Setup” and changed the minimum annular width, I manually changed every via from PCB, I deleted all marks before running DRC again, but I can’t make my annular 0,2mm width. For some reason it stays at its minimum of 0,1mm.
My KiCad version is 8.0.3.
Below are some screenshots I took with the error, board setup and tack & via properties.
…check also your net classes…
You made via bigger with not changing hole size and it didn’t helped?
I typically in Board Setup - Design Rules - Pre-defined Sizes define some via sizes (in my case 0.8/0.4, 0.9/0.5, 1/0.6) and then use them. As I only have GND vias I place them using ‘Add Vias’ tool from right toolbox.
The annular width , is the difference in radius between the drill diameter and the outside diameter of the via. 0.2mm is already quite thin. To make the PCB reliable, there should be copper all around the via, and the annular ring is needed to make sure there is some room for tolerances of the location of the hole. Also note that the diameter is the diameter of the finished hole, and the actual drill used will be a bit bigger.
So, what are the actual parameters of your via’s? Unless you have a very dense PCB, something like 1mm via’s with a 0.5mm drill is a sensible and easy to manufacture combination. This leaves an annular ring of 0.25mm.
On the board setup, I see a hole of .3mm, a via diameter of .6mm which equals an annular width of .15mm, but your minimum annular width is set to .2mm. Hence the DRC error?
Yes, that is the page I meant. As jmk also already mentioned (0.6-0.3)/2 = 0.15mm Also this PCB is not dense at all and there is no need to use such small via’s. Using 1mm via’s with a 0.5mm hole would be easy on this PCB.
Yes. This might be the case.
Ok. Thank you for help!
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