The following set of macros are intended to replace the stock CLEAR_NOZZLE and CLEAR_NOZZLE_PLR
It separates out the various sub-operations of these macros into discrete functions.
This allows for the user to have greater control over the initial nozzle wipe and purge steps
For CLEAR_NOZZLE the purging and PEI plate wiping are optional. By default both are disabled
by they can be enabled by passing the following parameters
PEI_WIPE=1 - Enable PEI plate wiping
PURGE=1 - Enable purging into the chute
For example, to restore default CLEAR_NOZZLE operation, we would call CLEAR_NOZZLE from
within the PRINT_START macro like so
CLEAR_NOZZLE HOTEND={hotendtemp} PEI_WIPE=1 PURGE=1
Various videos have demonstarted how violently the nozzle can collide with the edge of the mini PEI wiping plate. There have been a growing number of cases whereby people have reported that the ceramic heat-break on their nozzles are cracking. It is highly suspected that it is this violent collision that is the cause of the heat-breaks cracking and leaking
The following macro-set defaults to not doing the PEI wipe in an attempt to protect your expensive nozzles until Qidi comes up with a better solution.
Replace the stock CLEAR_NOZZLE and CLEAR_NOZZLE_PLR with all of the following macros
[gcode_macro _MOVE_TO_CHUTE]
description: Safely move nozzle over the purge chute if not already there
gcode:
M400
{% if (printer.gcode_move.position.x) != 95 %}
{% if (printer.gcode_move.position.y) != 324 %}
{% if (printer.gcode_move.position.x) < 56 %}
G1 X56 F12000 # Move to avoid collision with stepper motor
M400
{% endif %}
{% if (printer.gcode_move.position.y) != 300 %}
G1 Y300 F12000 # Move to avoid collision with purge activation arm
M400
{% endif %}
{% if (printer.gcode_move.position.x) > 56 %}
G1 X56 F12000 # Move in line with silicon scrubbing brush
M400
{% endif %}
G1 Y324 F600 # Slowly move back in line with purge chute
G1 X95 F600 # Move directly over the purge chute
M400 # Wait for all operations to complete
{% endif %}
{% else %}
{% if (printer.gcode_move.position.y) != 324 %}
G1 Y300 F12000
G1 Y324 F600
M400
{% endif %}
{% endif %}
[gcode_macro _ACTIVATE_PURGE_EJECTION]
description: Activate purge arm to drop purged filament down chute
gcode:
_MOVE_TO_CHUTE
M106 S255
G4 P5000
M104 S140
G1 Y318 F9000
G1 Y322 F600
G1 Y318 F9000
G1 Y322 F600
G1 Y308 F30000
G1 Y324 F600
[gcode_macro _PURGE_INTO_CHUTE]
description: Purge Filament into purge chute
gcode:
_MOVE_TO_CHUTE
G92 E0 # Set extruder position to 0
G1 E5 F50 # Purge 5mm of filament slowly
G92 E0 # Set extruder position to 0
G1 E80 F200 # Purge 80mm of filament at 2mm/s
G92 E0 # Set extruder position to 0
G1 E-2 F200 # Perform a 2mm retraction
_ACTIVATE_PURGE_EJECTION # Eject the purged filament
G1 E-1 # Perform a 1mm retraction
[gcode_macro _PEI_WIPE]
description: Wipe nozzle over PEI Plate
gcode:
_MOVE_TO_CHUTE
G1 X124
G1 X133 F200
G1 Y321 F200
G2 I0.5 J0.5 F600
G2 I0.5 J0.5 F600
G2 I0.5 J0.5 F600
G1 Y319 F150
G1 X132
G1 Y324
G1 X131
G1 Y319
G1 X130
G1 Y324
G1 X129
G1 Y319
G1 X113 F200
G1 Y320
G1 X125
G1 X113
G1 X125
G2 I0.5 J0.5 F200
G2 I0.5 J0.5 F200
G2 I0.5 J0.5 F200
M400
G1 Y320 F600
G1 X95 F600 # Gently move off the PEI plate back over the purge chute
M400
[gcode_macro _BRUSH_WIPE]
description: Wipe nozzle over Silicone Brush area
gcode:
_MOVE_TO_CHUTE
G1 Y300 F600
G1 X95 F12000
G1 Y314 F9000
G1 Y324 F600
G1 X58 F12000
G1 X78 F12000
G1 Y324
G1 X58 F12000
G1 X78 F12000
G1 Y323.5
G1 X58 F12000
G1 X78 F12000
G1 Y323
G1 X58 F12000
G1 X78 F12000
G1 Y322.5
G1 X58 F12000
G1 X78 F12000
G1 Y322
G1 X58 F12000
G1 X75 F12000
G1 Y321.5
G2 I0.8 J0.8 F600
G2 I0.8 J0.8 F600
G2 I0.8 J0.8 F600
G1 Y324 F600
M106 S0
G1 X95 F12000
G1 Y316 F9000
G1 Y312 F600
M400
# Specialized for power lose recovery
[gcode_macro CLEAR_NOZZLE_PLR]
description: Specialised Nozzle Clean after power loss
gcode:
{% set hotendtemp = params.HOTEND|default(250)|int %}
{% if (printer.gcode_move.position.z ) < 35 %}
G1 Z35 F900
{% else %}
G91
G1 Z{5} F900
G90
{% endif %}
_MOVE_TO_CHUTE
M106 S0
M109 S{hotendtemp}
G92 E0
G1 E5 F50
G92 E0
G1 E80 F200
G92 E0
G1 E-2 F200
G4 P300
M106 S255
G1 Y316 F30000
G1 Y320 F3000
G1 Y316 F30000
G1 Y320 F3000
G1 Y316 F30000
G1 Y320 F3000
G1 Y316 F12000
G1 Y312 F600
[gcode_macro CLEAR_NOZZLE]
description: Clear Nozzle of any stuck filament
gcode:
{% set hotendtemp = params.HOTEND|default(250)|int %}
{% set purge = params.PURGE|default(0)|int %}
{% set pei_wipe = params.PEI_WIPE|default(0)|int %}
{% if (printer.gcode_move.position.z ) < 35 %}
G1 Z35 F900
{% else %}
G91
G1 Z{5} F900
G90
{% endif %}
_MOVE_TO_CHUTE
M106 S0 # Turn off part cooling fan
M109 S{hotendtemp} # Wait for nozzle to reach full temperature
{% if purge == 1 %}
_PURGE_INTO_CHUTE # Hotend temp is set to 140 after this call
{% else %}
_ACTIVATE_PURGE_EJECTION # Hotend temp is set to 140 after this call
{% endif %}
TEMPERATURE_WAIT SENSOR=extruder MAXIMUM={170}
# Wipe Nozzle over the PEI plate
{% if pei_wipe == 1 %}
_PEI_WIPE
{% endif %}
# Wipe Nozzle using silicon brush
_BRUSH_WIPE
M118 Nozzle cleared
# Safely move nozzle to park position at back left
G1 Y300 F12000
M400
G1 X10 F12000
# Cool hotend down
M106 S255
M104 S140
TEMPERATURE_WAIT SENSOR=extruder MAXIMUM={150}
M106 S0
M400
M118 Nozzle cooled