I’m starting to set up my re-arm board and I would like some advice. I am currently using Marlin and my homing routine is:
G28 XY
G0 X 100 Y100
G28 Z
This is set automatically in marlin as I am using an inductive probe to set the Z height, Marlin offers a Z probe position which I have set to 100,100 to get the probe near the middle of the bed.
Is there a way to do this in Smoothie so i can issue a G28 and it automatically runs the homing routine?
You want to use the probe as endstop and home to 0 on Z-axis?
The other way to go about it would be to home to max and then probe the bed.
But if you want to use probe as endstop I guess you could set homing order to XYZ and debounce to 100/100. (but i could be wrong.=)
alpha_homing_retract_mm 100 # Distance to retract from the endstop after it is hit for alpha/X
beta_homing_retract_mm 100 # Distance to retract from the endstop after it is hit for beta/Y
gamma_homing_retract_mm 1 # Distance to retract from the endstop after it is hit for gamma/Z
gamma_min_endstop 1.28^ # Pin to read min endstop, add a ! to invert if endstop is NO connected to ground
#gamma_max_endstop 1.29^ # Pin to read max endstop, uncomment this and comment the above if using max endstops
gamma_homing_direction home_to_min
homing_order XYZ # X axis followed by Y then Z last
What I have done for now is set my startup code to:
G28 XY; home X and Y
G0 X75 Y75 ; move over the bed
G30 Z1.75 ; set the z height.
This seems to be working well and is giving repeatable first layers.
@Johan_Jakobsson Superb!! using axis_homing_retract_mm is a great idea. Thanks!!
Don’t know which printer you have so not sure what the “correct” way of homing it is.
But I do suspect homing to max and setting gamma_max to the distance from the bed, then probing to get bed surface would be a “correcter” solution.
It’s i3 clone that I made myself. It doesn’t have max endstops.
