Using the normal command, oval holes are "drilled" by a route command.
Some board houses do not accept this normal command.
In this case, the drill dialog allows using an other Excellon drill command (a slotted hole).
Note also some board houses do not understand this alternate command!
reasons:
* This option is called "bad practice" in gerber files format specifications and is even forbidden in gerber drill files.
* Generates problems with some board makers because these holes are not identified in a single NC file.
* No one was able to explain us how to identified them in a single NC file.
* Recent change in drill file generation is not compatible with merged holes (minor reason)
Drill report: serious enhancements.
Plot files names for copper layers: build from the user layer name, like in bzr 4022 stable version. no change for other layers.
added the example gen_gerber_and_drill_files_board.py in demos, which shows how to do that.
Fix a Printf format issue (shown in Debug mode) in Libedit (%d used for a size_t, changed in %zu)
legacy plugin: better compatibility with old brd files (current track width and current vias size, stored in SETUP section, were not read from file and incorrectly set)
2) Change from legacy Cu stack to counting down from top=(F_Cu or 0).
The old Cu stack required knowing the count of Cu layers to make
sense of the layer number when converting to many exported file types.
The new Cu stack is more commonly used, although ours still gives
B_Cu a fixed number.
3) Introduce class LSET and enum LAYER_ID.
4) Change *.kicad_pcb file format version to 4 from 3.
5) Change fixed names Inner1_Cu-Inner14_Cu to In1_Cu-In30_Cu and their
meanings are typically flipped.
6) Moved the #define LAYER_N_* stuff into legacy_plugin.cpp where they
can die a quiet death, and switch to enum LAYER_ID symbols throughout.
7) Removed the LEGACY_PLUGIN::Save() and FootprintSave() functions.
You will need to convert to the format immediately, *.kicad_pcb and
*.kicad_mod (=pretty) since legacy format was never going to know
about 32 Cu layers and additional technical layers and the reversed Cu
stack.
Maciej Suminski
jean-pierre charras
Jon Evans
unknown
Wayne Stambaugh
Martin Janitschke