This is a fully automatic 3d printed brush holder that can clean your nozzle before every print using custom gcode. I remixed this model from this model: "https://www.printables.com/model/742343-ender-3-v3-ke-and-se-automatic-nozzle-cleaning-bru". Ive changed the original model from my model by adding one extra arm to grab on to the plate. I did this because the original model was wobbly therefore having less nozzle cleaning abilities. Also, to attach the Bambu Labs brush I had in the pictures, I used this model: "https://www.printables.com/model/969575-blobifier-dropin-adapter-for-bambu-silicone-nozzle".

Here is the custom gcode I used for the automatic cleaning before every print. You might need to tweak these codes, every printer is different.

M220 S100 ;Reset Feedrate

M221 S100 ;Reset Flowrate

M140 S[bed_temperature_initial_layer_single] ;Set final bed temp

G28 ;Home

G92 E0 ;Reset Extruder

G1 Z2.0 F3000 ;Move Z Axis up

M104 S[nozzle_temperature_initial_layer] ;Set final nozzle temp

G1 X-2.1 Y20 Z0.28 F5000.0 ;Move to start position

G1 X103 Y-18 Z5 F5000.0 ;Line up with brush

M190 S[bed_temperature_initial_layer_single] ;Wait for bed temp to stabilize

M109 S[nozzle_temperature_initial_layer] ;Wait for nozzle temp to stabilize

M300 S1000 P200 ;First beep

M300 S0 P200 ;Wait

M300 S1200 P200 ;Second beep

G1 X150 Y-18 Z5 F5000.0 ;Wipe 1; ->

G1 X105 Y-18 Z5 F5000.0 ;Wipe 2; <-

G1 X150 Y-18 Z5 F5000.0 ;Wipe 3; ->

G1 X105 Y-18 Z5 F5000.0 ;Wipe 4; <-

G1 X150 Y-18 Z5 F5000 ;Wipe 5; ->

G1 X105 Y-18 Z5 F5000.0 ;Wipe 6; <-

G1 X150 Y-18 Z5 F5000.0 ;Wipe 7; ->

G1 X105 Y-18 Z5 F5000.0 ;Wipe 8; <-

G1 X150 Y-18 Z5 F7500.0 ;Wipe 9; ->

G1 X105 Y-18 Z5 F7500.0 ;Wipe 10; <-

G1 X150 Y-18 Z5 F7500.0 ;Wipe 11; ->

G1 X105 Y-18 Z5 F7500.0 ;Wipe 12; <-

G1 X150 Y-18 Z5 F7500 ;Wipe 13; ->

G1 X105 Y-18 Z5 F7500.0 ;Wipe 14; <-

G1 X150 Y-18 Z5 F7500.0 ;Wipe 15; ->

G1 X105 Y-18 Z5 F7500.0 ;Wipe 16; <-

G1 X105 Y-18 Z8 F5000.0 ;Raise to clear brush

M190 S[bed_temperature_initial_layer_single] ;Wait for bed temp to stabilize

M109 S[nozzle_temperature_initial_layer] ;Wait for nozzle temp to stabilize

G1 X-2.1 Y20 Z0.28 F5000.0 ;Move to start position

G1 X-2.1 Y145.0 Z0.28 F1500.0 E15 ;Draw the first line

G1 X-2.4 Y145.0 Z0.28 F5000.0 ;Move to side a little

G1 X-2.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line

G92 E0 ;Reset Extruder

G1 E-1.0000 F1800 ;Retract a bit

G1 Z2.0 F3000 ;Move Z Axis up

G1 E0.0000 F1800

I would recommend printing with PETG. It would probably be ok to use PLA too.

For extra strength, use these settings.

4 walls

75% infill

Gyroid Infill

.20mm layer height

Ender 3 V3 SE/KE Brush Holder

Original