Z_Adaptive_Purge.cfg

# # # Klipper Adaptive Purging - ZeroG Logo # # #

# Based on the original found here: https://github.com/kyleisah/Klipper-Adaptive-Meshing-Purging/tree/main/Configuration
# This macro will parse information from objects in your gcode to define a min and max area, creating a nearby purge with Voron flair!
# For successful purging, you may need to configure:
# 
# [extruder]
# max_extrude_cross_section: 5


[gcode_macro ADAPTIVE_PURGE]
description: A purge macro that adapts to be near your actual printed objects

variable_adaptive_enable: True      # Change to False if you'd like the purge to be in the same spot every print
variable_z_height: 0.4              # Height above the bed to purge
variable_tip_distance: 15            # Distance between filament tip and nozzle before purge (this will require some tuning)
variable_purge_amount: 15           # Amount of filament to purge
variable_flow_rate: 10              # Desired flow rate in mm3/s
variable_x_default: 10              # X location to purge, overwritten if adaptive is True
variable_y_default: 10              # Y location to purge, overwritten if adaptive is True
variable_size: 20                   # Size of the logo
variable_distance_to_object_x: 15   # Distance in x to the print area
variable_distance_to_object_y: 0    # Distance in y to the print area
variable_travel_speed: 300          # Travel speed

gcode:
    {% if adaptive_enable == True %}
        {% set all_points = printer.exclude_object.objects | map(attribute='polygon') | sum(start=[]) %}
        {% set x_origin = (all_points | map(attribute=0) | min | default(x_default + distance_to_object_x + size)) - distance_to_object_x - size %}
        {% set y_origin = (all_points | map(attribute=1) | min | default(y_default + distance_to_object_y + size)) - distance_to_object_y - size %}
        {% set x_origin = ([x_origin, 0] | max) %}
        {% set y_origin = ([y_origin, 0] | max) %}
    {% else %}
        {% set x_origin = x_default | float %}
        {% set y_origin = y_default | float %}
    {% endif %}
    {% set purge_move_speed = 2.31 * size * flow_rate / (purge_amount * 2.405) %}
    {% set prepurge_speed = flow_rate / 2.405 %}
    { action_respond_info( "x: " + x_origin|string + " y: " + y_origin|string + " purge_move_speed: " + purge_move_speed|string + " prepurge_speed: " + prepurge_speed|string ) }

    G92 E0
    G0 F{travel_speed*60}                                                               # Set travel speed
    G90                                                                                 # Absolute positioning
    G0 X{x_origin} Y{y_origin+size/2}                                                   # Move to purge position
    G0 Z{z_height}                                                                      # Move to purge Z height
    M83                                                                                 # Relative extrusion mode
    G1 E{tip_distance} F{prepurge_speed*60}                                             # Move tip of filament to nozzle
    G1 X{x_origin+size*0.285} Y{y_origin+size} E{purge_amount/4} F{purge_move_speed*60} # Purge first line of logo                                                                  
    G1 X{x_origin+size*0.789} Y{y_origin+size} E{purge_amount/4} F{purge_move_speed*60} # Purge second line of logo
    G1 X{x_origin+size*0.250} Y{y_origin} E{purge_amount/4} F{purge_move_speed*60}      # Purge third line of logo
    G1 X{x_origin+size*0.711} Y{y_origin} E{purge_amount/4} F{purge_move_speed*60}      # Purge fourth line of log
    G1 X{x_origin+size} Y{y_origin+size/2}  E{purge_amount/4} F{purge_move_speed*60}    # Purge fifth line of logo
    G1 X{x_origin+size*0.80} Y{y_origin+size/2}  E{purge_amount/4} F{purge_move_speed*60}    # Purge sixth line of logo
    G1 E-0.5 F2100                                                                       # Retract
    G92 E0                                                                              # Reset extruder distance