120 lines
7.7 KiB
INI
120 lines
7.7 KiB
INI
[gcode_macro LINE_PURGE]
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description: A purge macro that adapts to be near your actual printed objects
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gcode:
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# Get relevant printer params
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{% set travel_speed = (printer.toolhead.max_velocity) * 60 | float %}
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{% set cross_section = printer.configfile.settings.extruder.max_extrude_cross_section | float %}
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# Use firmware retraction if it is defined
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{% if printer.firmware_retraction is defined %}
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{% set RETRACT = G10 | string %}
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{% set UNRETRACT = G11 | string %}
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{% else %}
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{% set RETRACT = 'G1 E-.5 F2100' | string %}
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{% set UNRETRACT = 'G1 E.5 F2100' | string %}
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{% endif %}
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# Get purge settings from _Kamp_Settings
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{% set verbose_enable = printer["gcode_macro _KAMP_Settings"].verbose_enable | abs %}
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{% set purge_height = printer["gcode_macro _KAMP_Settings"].purge_height | float %}
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{% set tip_distance = printer["gcode_macro _KAMP_Settings"].tip_distance | float %}
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{% set purge_margin = printer["gcode_macro _KAMP_Settings"].purge_margin | float %}
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{% set purge_amount = printer["gcode_macro _KAMP_Settings"].purge_amount | float %}
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{% set flow_rate = printer["gcode_macro _KAMP_Settings"].flow_rate | float %}
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# Calculate purge origins and centers from objects
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{% set all_points = printer.exclude_object.objects | map(attribute='polygon') | sum(start=[]) %} # Get all object points
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{% set purge_x_min = (all_points | map(attribute=0) | min | default(0)) %} # Object x min
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{% set purge_x_max = (all_points | map(attribute=0) | max | default(0)) %} # Object x max
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{% set purge_y_min = (all_points | map(attribute=1) | min | default(0)) %} # Object y min
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{% set purge_y_max = (all_points | map(attribute=1) | max | default(0)) %} # Object y max
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{% 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
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{% 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
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{% set purge_x_origin = ([purge_x_min - purge_margin, 0] | max) %} # Add margin to x min, compare to 0, and choose the larger
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{% set purge_y_origin = ([purge_y_min - purge_margin, 0] | max) %} # Add margin to y min, compare to 0, and choose the larger
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# Calculate purge speed
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{% set purge_move_speed = (flow_rate / 5.0) * 60 | float %}
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{% if cross_section < 5 %}
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{action_respond_info("[Extruder] max_extrude_cross_section is insufficient for purge, please set it to 5 or greater. Purge skipped.")}
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{% else %}
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{% if verbose_enable == True %}
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{action_respond_info("Moving filament tip {}mms".format(
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(tip_distance),
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)) }
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{% endif %}
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{% if printer.firmware_retraction is defined %}
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{action_respond_info("KAMP purge is using firmware retraction.")}
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{% else %}
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{action_respond_info("KAMP purge is not using firmware retraction, it is recommended to configure it.")}
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{% endif %}
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{% if purge_y_origin > 0 %}
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{action_respond_info("KAMP purge starting at {}, {} and purging {}mm of filament, requested flow rate is {}mm/s3.".format(
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(purge_x_center),
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(purge_y_origin),
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(purge_amount),
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(flow_rate),
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)) }
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{% else %}
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{action_respond_info("KAMP purge starting at {}, {} and purging {}mm of filament, requested flow rate is {}mm/s3.".format(
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(purge_x_origin),
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(purge_y_center),
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(purge_amount),
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(flow_rate),
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)) }
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{% endif %}
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SAVE_GCODE_STATE NAME=Prepurge_State # Create gcode state
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{% if purge_y_origin > 0 %} # If there's room on Y, purge along X axis in front of print area
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G92 E0 # Reset extruder
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G0 F{travel_speed} # Set travel speed
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G90 # Absolute positioning
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G0 X{purge_x_center} Y{purge_y_origin} # Move to purge position
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G0 Z{purge_height} # Move to purge Z height
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M83 # Relative extrusion mode
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G1 E{tip_distance} F{purge_move_speed} # Move filament tip
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G1 X{purge_x_center + purge_amount} E{purge_amount} F{purge_move_speed} # Purge line
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{RETRACT} # Retract
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G0 X{purge_x_center + purge_amount + 10} F{travel_speed} # Rapid move to break string
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G92 E0 # Reset extruder distance
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M82 # Absolute extrusion mode
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G0 Z{purge_height * 2} F{travel_speed} # Z hop
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{% else %} # If there's room on X, purge along Y axis to the left of print area
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G92 E0 # Reset extruder
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G0 F{travel_speed} # Set travel speed
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G90 # Absolute positioning
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G0 X{purge_x_origin} Y{purge_y_center} # Move to purge position
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G0 Z{purge_height} # Move to purge Z height
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M83 # Relative extrusion mode
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G1 E{tip_distance} F{purge_move_speed} # Move filament tip
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G1 Y{purge_y_center + purge_amount} E{purge_amount} F{purge_move_speed} # Purge line
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{RETRACT} # Retract
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G0 Y{purge_y_center + purge_amount + 10} F{travel_speed} # Rapid move to break string
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G92 E0 # Reset extruder distance
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M82 # Absolute extrusion mode
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G0 Z{purge_height * 2} F{travel_speed} # Z hop
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{% endif %}
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RESTORE_GCODE_STATE NAME=Prepurge_State # Restore gcode state
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{% endif %}
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