I am converting a cubex duo with a rumba board and am in final stages of setting up config.
I have steppers set for home 0,0,0 at top rear left.
I have:
MANUAL_Z_HOME_POS set to -3
MANUAL_X_HOME_POS set to 0
MANUAL_Y_HOME_POS set to 0
and when I G28 It homes to X=0, Z=0, Y= -3 (displayed on LCD) and is
on all three endstops.
So 0 on z axis is at bed height.
I wanted to do the same with Y by setting MANUAL_Y_HOME_POS set to -25, which would make 0,0, 0 actually on the bed rather than 25mm behind it.
However when I set:
MANUAL_Z_HOME_POS set to -3
MANUAL_X_HOME_POS set to 0
MANUAL_Y_HOME_POS set to -25
It actually homes at 0 on the X axis (on the endstop) and +25mm away from the endstop on the Y. The LCD still shows position as X= 0, Y= 0, Z= -3.
I was expecting it to home at the Y endstop and for the LCD to show X= 0, Y= -25, Z= -3 based on the way the Z works).
So Z and Y Manual_ Home_Pos are behaving differently? Is it a bug or am I misunderstanding the use of these?
I would have been perfectly happy if on G28 the Z had acted in the same manner as the Y by homing on the endstop and then move 3mm down and it being 0,0,0 at that position.
Any ideas?
On a similar point, which would not be an issue if it would home at Z=3mm below endstop is, Is there a way to prevent Y or x movement when Z is below 0 (as per the example above)?
I am happy with Home being off the bed on the Y axis but being being 3mm below the bed on the Z means any Y movement after a home will slam the extruder into the bed.
