macros_nozzle_scrub.cfg

## Rewritten from Hernsl & Edwardyeeks and incorporate zellenralex rewrite concepts

[gcode_macro clean_nozzle]
description: Move toolhead to bucket, purge and scrub the nozzle. Usage: CLEAN_NOZZLE [INDEX=index(current_filament_index)] [DOPURGE=1]
gcode:	
	{% set user = printer['gcode_macro _USER_VARIABLE'] %}
	{% set pos = user.purge.purge %} # x,y,z location
	{% set move_z = [user.z_hop, printer.toolhead.position.z]|max %}   ; Calculate hoihg move from higher of current toolhead location or defined z_hop height (if mag probe stuff is defined)
	{% set filament = printer.save_variables.variables.filament %}
    {% set _idx = params.INDEX|default(filament.index)|int %}
	{% set dopurge = params.DOPURGE|default(1)|int %}

    _CG28												            	; Home if not already homed (removes original error message)
    LED_CLEANING
	SAVE_GCODE_STATE NAME=clean_nozzle
	SET_GCODE_OFFSET Z=0.0
	RESPOND MSG="Cleaning"
	G90													               ; Absolute positioning
	{% set leftright = range(2)|random|int %}                          ; Randomly pick which side bucket to use
	G1 Z{move_z} F{user.speed.z_hop}    		                       ; Move head up for travel
	
	{% if leftright == 0 %} 						                   ; Randomly picked left
        G1 X{[user.purge.wipe.start.x, user.purge.wipe.end.x]|min - 5} Y{pos.y} F{user.speed.travel}	# move over left purge bucket
	{% else %}					                                       ; Randomly picked right
		G1 X{[user.purge.wipe.start.x, user.purge.wipe.end.x]|max + 5} Y{pos.y} F{user.speed.travel}	# move over right purge bucket
	{% endif %}
	
	# Heat up hotend to current filament melt temp if needed
	{% if dopurge == 1 %}
		{% if not printer.extruder.can_extrude or (printer['extruder'].temperature < filament.array[_idx].hotend) %}
   			{action_respond_info("Extruder temp too low. Heating to %3.1fC" % [printer.configfile.settings.extruder.min_extrude_temp,filament.array[filament.index].hotend]|max)}
      		LED_TOOLHEAD_HEATING
      		M109 S{[printer.configfile.settings.extruder.min_extrude_temp,filament.array[filament.index].hotend]|max}
      		LED_CLEANING
   		{% endif %}
	{% endif %}
   
   {% if dopurge == 1 %}
    	# Do the purge
    	G92 E0												; Reset extruder
    	M83													; Extruder to relative
		G1 E{user.filament.retract.end * 1.5} F200	
		G1 E-{user.filament.retract.end} F{user.speed.retract}
		G4 P500
		G92 E0
	{% endif %}
    _WIPE												   ; Perform the wipe
	
	RESPOND MSG="Cleaned!"
	UPDATE_DELAYED_GCODE ID=_CLEAR_DISPLAY DURATION=1
	RESTORE_GCODE_STATE NAME=clean_nozzle
    LED_STANDBY
		
	
[gcode_macro _WIPE]
description: Helper: Wipe nozzle at bucket
gcode:
    {% set user = printer['gcode_macro _USER_VARIABLE'] %}
	{% set wipe = user.purge.wipe %} # x,y,z location
	G90 # Absolute positioning

	# Wipe nozzle
	G0 X{wipe.start.x} Y{wipe.end.y} Z{wipe.start.z} F{user.speed.wipe}
   {% for wipes in range(0, wipe.cnt) %}
		{% for coordinate in wipe.start.x, wipe.end.x %}
			G0 X{coordinate} Y{wipe.end.y}  
		{% endfor %}
	{% endfor %}

	G0 X{wipe.end.x} Y{wipe.end.y} Z{wipe.end.z}