M701.cfg

# See: https://reprap.org/wiki/G-code#M701:_Load_filament
[gcode_macro M701]
description: Load filament compatible command
gcode:
    # Setup fallback defaults
    {% set default_u = 100 %}

    # Try load bowden tube length from saved variables
    {% if 'save_variables' in printer %}
        {% set svv = printer.save_variables.variables %}
        {% if 'bowden_length' in svv %}
            {% set default_u = svv.bowden_length %}
        {% endif %}
    {% endif %}

    # Get command parameters
    {% set i    = params.I|default(30)|float %}
    {% set i_f  = params.IF|default(180)|float %}
    {% set u    = params.U|default(default_u)|float %}
    {% set u_f  = params.UF|default(360)|float %}
    {% set p    = params.P|default(30)|float %}
    {% set p_f  = params.PF|default(180)|float %}

    {% if printer.idle_timeout.state == "Printing" and not printer.pause_resume.is_paused %}
        {action_respond_info("This command cannot be used while printing")}
    {% elif printer.extruder.temperature < 170 %}
        {action_respond_info("Extruder temperature too low")}
    {% else %}
    SAVE_GCODE_STATE NAME=M701_state
    M83
    {% if i > 0.0 %}
        G1 E{i} F{i_f}
    {% endif %}
    {% if u > 0.0 %}
        G1 E{u} F{u_f}
    {% endif %}
    {% if p > 0.0 %}
        G1 E{p} F{p_f}
    {% endif %}
    RESTORE_GCODE_STATE NAME=M701_state MOVE=0
    {% endif %}