Mill-Pocket operation does ignore 'Arc precision' tool setting #3009
Description
Version
2.1.19 , also checked on 2.1.17 and latest Nightly (2026-01-23)
Hardware / Firmware
GRBL 1.1
What happened
Please see attached ugsd file. I've created an object (in two instances). The Mill-inside cut is responsive to the Arc precision value setting: when set low value the circle is quite smooth.
While the Mill-Pocket cut does not improve the tool path when reducing the value on arc precision. In effect the arc or circle is build from visible lines longer than the selected 'arc precision" value.
Now imagine 1st operation a mill-pocket with this non-smooth path and mill-inside path as 2nd operation as "finish cut": the internal cut of an island stays "unfinished" because 1st operation cuts deeper in the island anyway.
How to reproduce
Open attached ugsd file and compare tool path of both operations, it is quite visible eg. at 'arc precision" value set to 0.01mm.
Operating System
WIndows 11
Anything else
In my opinion arc-precision setting shall apply to all generated operations, not only to mill-inside | on | outside - path, unless it is by desing and I'm missing some steps or settings deeper in the s/w.
Also, quite confusing is the value of "Step size:0.991mm" displayed at the bottom bar. What does it means and where I can change it?