Automatic Nozzle Cleaning Brush - Ender 3 V3 KE/SE

This is my version of an automatic nozzle cleaner set up. I tried the other models out there but none of them fit with the gridfinity side mounts or other side-storage style models.

Install is really simple. Just chop off the end of a cheap aliexpress/amazon brush and hot glue it onto the mounting plate. It can be secured to your printer with the M4 nut. You can smoosh it into the nut holder for your convenience.

Add this macro into your gcode_macro.cfg file.

[gcode_macro WIPE_NOZZLE]

gcode:

{% set TEMP = params.TEMP | default(200) | float %}

M104 S{TEMP} ; heat extruder

M109 S{TEMP} ; wait for extruder temp

{% if printer.toolhead.homed_axes != "xyz" %}

G28 ; home xyz if not already

{% endif %}

G1 Z10 X-12.0 Y30.0 F6000 ;Start position

G0 Z-2 F6000 ;Move to wipe position

G0 Y-19.000 F8000 ; Wipe down

G0 Y21.000 F8000 ; Wipe up

G0 Y-19.000 F8000 ; Wipe down

G0 Y21.000 F8000 ; Wipe up

G0 Y-19.000 F8000 ; Wipe down

G0 Y100 Z10 F6000 ; Move back to safety

Then just call on this macro in your start g-code or wherever you need it like this:

WIPE_NOZZLE TEMP={EXTRUDER_TEMP} ; wipe nozzle macro

Please note it's probably best to put this after your G28 (homing) command so that it doesn't run twice when starting a print.