Ender 3 Pro Nozzle Wipe Attachment: Mirrored Version of Legend's Design

Remixed version of Legend's Ender 3 Nozzle Wipe Attachment. Also modified so the brush should only protrude about 2mm above the build plate to minimize issues with nozzle offsets to probes during bed leveling and meshing.

Print with PETG or HT-PLA, no supports required, I used 30% infill. Regular PLA is not appropriate for this print and will warp.

I used https://us.polymaker.com/products/polymaker-ht-pla-gf?variant=44469752692793 which I have found, with annealing, to be one of my favorite filaments.

Add the following to a nozzle_wipe.cfg (note that the x-y coordinates are based on my machine and may require some adjustment for custom configurations, my bed is in the stock configuration):

[gcode_macro BRUSH_NOZZLE] 
# heat nozzle for best results 
variable_x1: 204.5 # left of brush
variable_x2: 240.5 # right or brush
variable_y1: -6.5 # y value 
variable_z1: 1.6 # nozzle height

gcode: 
M400 ;wait for buffer to clear 
{% if "xyz" not in printer.toolhead.homed_axes %} G28 ;home axes before travel moves {% endif %} 
G90 
G0 Z5 F3600 ;ensure nozzle is above endstop pin 
G0 X{x1} Y{y1} ;left position 
G0 Z{z1} ;move down, ready for brushing 
M117 Brushing Nozzle 
G0 X{x2} F5000 ;move right 
G0 X{x1} ;move left 
G0 X{x2} ;move right 
G0 X{x1} ;move left 
G0 X{x2} ;move right 
G0 X{x1} ;move left 
G0 X{x2} ;move right 
G0 X{x1} ;move left 
G0 Z5 F3600 ;raise nozzle when done 
M117 Nozzle Cleaned

Add BRUSH_NOZZLE to your slicer gcode after homing, extruder heating, and purging (if purging)