I think I found it!
To deal with an inverted motor I do:
M92 X169.856 Y168.856 Z-84.928 E101.92; # set steps per unit (with invert..)
Note the "-" on the Z.
If I do:
M92 X169.856 Y168.856 Z84.928 E101.92; (no invert on Z)
G28 Z *does* respond to the Z-min switch (manual actuation). Although it moves
in the wrong direction.
This looks like a bug or something.
To deal with an inverted motor I do:
M92 X169.856 Y168.856 Z-84.928 E101.92; # set steps per unit (with invert..)
Note the "-" on the Z.
If I do:
M92 X169.856 Y168.856 Z84.928 E101.92; (no invert on Z)
G28 Z *does* respond to the Z-min switch (manual actuation). Although it moves
in the wrong direction.
This looks like a bug or something.