home_if_needed.cfg

[gcode_macro HOME_IF_NEEDED]
#
# HOME_IF_NEEDED
#
# Perform a homing action only if one of the axes isn't homed.
#
description: Conditional home (i.e., home only if not homed already)
gcode:

    {% set verbose = params.VERBOSE|default(False) %}

    {% if not (('xy' in printer.toolhead.homed_axes) or ('z' in printer.toolhead.homed_axes)) %}
        {% if verbose %}
            { action_respond_info("Homing!") }
        {% endif %}

        {% for i in range(3) %}
          M300 P500 S4000
          G4 P250
        {% endfor %}
        G28
    {% endif %}