print_start.cfg

[gcode_macro PRINT_START]
gcode:
    {% set bedtemp = params.BED|int %}
    {% set hotendtemp = params.HOTEND|int %}
    {% set chambertemp = params.CHAMBER|default(0)|int %}
    SET_GCODE_VARIABLE MACRO=_APPLY_NOZZLE_OFFSET VARIABLE=hotend_temp VALUE={hotendtemp}

    M140 S{bedtemp}                     # Initiate Print Bed Warmup as early as possible
    M400                                # Wait for all prior G-code commands to be processed by MCU
    M104 S0                             # Make sure hotend is off
    M106 P3 S0                          # Turn off chamber circulation/exhaust fan

    M400                                # Wait for all prior G-code commands to processed before G28
    G28                                 # Home all axes
    CLEAR_NOZZLE HOTEND={hotendtemp}    # Do nozzle purge and wipe
    M190 S{bedtemp}                     # Wait for print bed to reach target temperature
    G29                                 # Mesh and Z offset (bed at temp, chamber cold)

    {% if chambertemp > 0 %}            # Special chamber handling for fastest thorough warmup times
        M106 P0 S255                    # Ensure part cooling fan is full speed for better air mixing
        M106 P2 S255                    # Ensure AUX is at 100% after CLEAR_NOZZLE was called
        G0 Z5 F600                      # Bring print bed to Z=5mm.  This helps with chamber heating
        G0 X152 Y152 F6000              # Bring print head to middle of print bed
        M191 S{chambertemp-5}           # Wait for chamber to reach 5C less than the target temperature
        M141 S{chambertemp}             # Reset chamber target to full target
        M106 P2 S0                      # Turn off AUX Fan
        M106 P0 S0                      # Turn off part cooling fan
    {% endif %}

    G0 Z5 F600                          # Move plate to Z=5mm
    G0 X5 Y5 F6000                      # Move print head to front-left
    #SMART_PARK                          # KAMP Smart Park instead
    M109 S{hotendtemp}                  # Commence hotend warmup
    M204 S10000                         # Set velocity limits
    SET_PRINT_STATS_INFO CURRENT_LAYER=1
    ENABLE_ALL_SENSOR
    save_last_file