marciot
commented
4 years ago You need to configure the proper offset for the BLTouch using M851. Once you do this, Marlin will only probe the points on the bed for which there is enough enough travel to reach. It is unlikely your printer will be able to reach all the points unless you have modified it to add travel distance. Once the automatic probe is complete, you can either ask Marlin to interpolate the remaining points using "G29 P3" or manually set points as described here under "Manual Probing":
https://marlinfw.org/docs/features/unified_bed_leveling.html
Config: Taz5 Aero Archim2 BLTouch. Latest Drunken Octopus release.
When performing mesh population using: G29 P1 The display indicates 17/25 points at completion of process. The process reports normal completion ("Taz 5 Ready") in terminal. Mesh is apparently usable, though I have had consistant minor mesh errors, which may be related to this. Another user with the same configuration has reported this behavior as well.