N4 Plus Smart Line Purge

[S117X]

Hello all, I've just finished flashing and encounter while the machine is line purging after it would finish, X axis would not return home instead it would try to move right hit the end stop which there is none. This would cause starting print out of bed are. I had Grok analyzed it and its seems to be working.

#Line Purge
#Credit Grok Generated
[gcode_macro LINE_PURGE]
description: A purge macro that adapts to be near your actual printed objects
gcode:
# Get relevant printer params
{% set travel_speed = (printer.toolhead.max_velocity) * 60 | float %}
{% set cross_section = printer.configfile.settings.extruder.max_extrude_cross_section | float %}

# Use firmware retraction if it is defined
{% if printer.firmware_retraction is defined %}
    {% set RETRACT = G10 | string %}
    {% set UNRETRACT = G11 | string %}
{% else %}
    {% set RETRACT = 'G1 E-.5 F2100' | string %}
    {% set UNRETRACT = 'G1 E.5 F2100' | string %}
{% endif %}

# Get purge settings from _Kamp_Settings
{% set verbose_enable = printer["gcode_macro _KAMP_Settings"].verbose_enable | abs %}
{% set purge_height = printer["gcode_macro _KAMP_Settings"].purge_height | float %}
{% set tip_distance = printer["gcode_macro _KAMP_Settings"].tip_distance | float %}
{% set purge_margin = printer["gcode_macro _KAMP_Settings"].purge_margin | float %}
{% set purge_amount = printer["gcode_macro _KAMP_Settings"].purge_amount | float %}
{% set flow_rate = printer["gcode_macro _KAMP_Settings"].flow_rate | float %}

# Calculate purge origins and centers from objects
{% set all_points = printer.exclude_object.objects | map(attribute='polygon') | sum(start=[]) %}    # Get all object points
{% set purge_x_min = (all_points | map(attribute=0) | min | default(0)) %}                          # Object x min
{% set purge_x_max = (all_points | map(attribute=0) | max | default(0)) %}                          # Object x max
{% set purge_y_min = (all_points | map(attribute=1) | min | default(0)) %}                          # Object y min
{% set purge_y_max = (all_points | map(attribute=1) | max | default(0)) %}                          # Object y max

{% set purge_x_center = ([((purge_x_max + purge_x_min) / 2) - (purge_amount / 2), 0] | max) %}      # Create center point of purge line relative to print on X axis
{% set purge_y_center = ([((purge_y_max + purge_y_min) / 2) - (purge_amount / 2), 0] | max) %}      # Create center point of purge line relative to print on Y axis

{% set purge_x_origin = ([purge_x_min - purge_margin, 0] | max) %}                                  # Add margin to x min, compare to 0, and choose the larger
{% set purge_y_origin = ([purge_y_min - purge_margin, 0] | max) %}                                  # Add margin to y min, compare to 0, and choose the larger

# Calculate purge speed
{% set purge_move_speed = (flow_rate / 5.0) * 60 | float %}

# Debug information
{action_respond_info("Current position before purge: X{} Y{}".format(printer.toolhead.position[0], printer.toolhead.position[1]))}

{% if cross_section < 5 %}

    {action_respond_info("[Extruder] max_extrude_cross_section is insufficient for purge, please set it to 5 or greater. Purge skipped.")}

{% else %}

    {% if verbose_enable == True %}

    {action_respond_info("Moving filament tip {}mms".format(                                                                 
        (tip_distance),                                                                                      
    )) }
    {% endif %}

    {% if printer.firmware_retraction is defined %}
        {action_respond_info("KAMP purge is using firmware retraction.")}
    {% else %}
        {action_respond_info("KAMP purge is not using firmware retraction, it is recommended to configure it.")}
    {% endif %}

    {% if purge_y_origin > 0 %}
    
        {action_respond_info("KAMP purge starting at {}, {} and purging {}mm of filament, requested flow rate is {}mm3/s.".format(                                                                 
            (purge_x_center),
            (purge_y_origin),
            (purge_amount),
            (flow_rate),
        )) }

    {% else %}

        {action_respond_info("KAMP purge starting at {}, {} and purging {}mm of filament, requested flow rate is {}mm3/s.".format(                                                                 
            (purge_x_origin),
            (purge_y_center),
            (purge_amount),
            (flow_rate),
        )) }

    {% endif %}

    SAVE_GCODE_STATE NAME=Prepurge_State                                                    # Create gcode state

    {% if purge_y_origin > 0 %}                                                             # If there's room on Y, purge along X axis in front of print area

        G92 E0                                                                              # Reset extruder
        G0 F{travel_speed}                                                                  # Set travel speed
        G90                                                                                 # Absolute positioning
        G0 X{purge_x_center} Y{purge_y_origin}                                              # Move to purge position
        G0 Z{purge_height}                                                                  # Move to purge Z height
        M83                                                                                 # Relative extrusion mode
        G1 E{tip_distance} F{purge_move_speed}                                              # Move filament tip
        G1 X{purge_x_center + purge_amount} E{purge_amount} F{purge_move_speed}             # Purge line
        {RETRACT}                                                                           # Retract
        G0 X{purge_x_center + purge_amount + 10} F{travel_speed}                            # Rapid move to break string
        G92 E0                                                                              # Reset extruder distance
        M82                                                                                 # Absolute extrusion mode
        G0 Z{purge_height * 2} F{travel_speed}                                              # Z hop

    {% else %}                                                                              # If there's room on X, purge along Y axis to the left of print area
        
        G92 E0                                                                              # Reset extruder
        G0 F{travel_speed}                                                                  # Set travel speed
        G90                                                                                 # Absolute positioning
        G0 X{purge_x_origin} Y{purge_y_center}                                              # Move to purge position
        G0 Z{purge_height}                                                                  # Move to purge Z height
        M83                                                                                 # Relative extrusion mode
        G1 E{tip_distance} F{purge_move_speed}                                              # Move filament tip
        G1 Y{purge_y_center + purge_amount} E{purge_amount} F{purge_move_speed}             # Purge line
        {RETRACT}                                                                           # Retract
        G0 Y{purge_y_center + purge_amount + 10} F{travel_speed}                            # Rapid move to break string
        G92 E0                                                                              # Reset extruder distance
        M82                                                                                 # Absolute extrusion mode
        G0 Z{purge_height * 2} F{travel_speed}                                              # Z hop

    {% endif %}

    RESTORE_GCODE_STATE NAME=Prepurge_State                                                 # Restore gcode state

    # Home X axis after purge
    G28 X0                                                                                   # Home X axis

    # Additional debug information after purge and homing
    {action_respond_info("Current position after purge and homing: X{} Y{}".format(printer.toolhead.position[0], printer.toolhead.position[1]))}

{% endif %}

#####################################

[halfmanbear]

Interesting! This would be a nice commit / feature addition to the KAMP project.

https://github.com/kyleisah/Klipper-Adaptive-Meshing-Purging

[S117X]

After further investigation, I had mixed a machine in the slicer that had Machine Start G code already in it. instead of using the OpenNeptune one as printer profile.

But it did fix the issue the only, problem was it wouldn't smart park it would home then smart park!

AI is crazy.