My randomly changing track widths problem is back. This time I am editing a board done by someone else, beefing up power traces, etc. The entire board was routed with the KiCad default trace width of .25 mm by an inexperienced designer. In the screen shot you can see how occasional segments get changed, but entire routes get changed, always from the small size to the larger size. This board was done with V5.0.2; I am editing it in 5.1.9.
Note the round artifact to the left of Pin 3 on the connector. KiCad seems to leave these segments throughout the board on every board I’ve ever done. They don’t generally cause problems. On this board, however, we couldn’t use the 3D view because it couldn’t determine the board outline. With DRC, I eventually found 2 small round segments on the edge cuts layer seven inches outside the board edge. Deleted them; it works.
I had not tried the track cleanup mentioned in the FAQ; sounds like it will save some grief in the future, but it is a separate issue from the random changes in widths.
This is a 6 layer board, and all 5 trace layers have been affected. The changed tracks increased in size to a size previously not used on this board by the original designer, but used by me in the editing process.
Other KiCad users in my organization have reported similar issues. It is not common, but it sure is a PITA.
I will post the screen shot as soon as I figure out how.