A nozzle brush mod for the Ender 3 S1 Pro that uses Bambu Lab A1 silicone pads to effectively wipe the nozzle meaning a lower chance of prints failing as there is a smaller amount of stubborn filament clinging onto the nozzle. All you need for this mod is the part itself and some A1 nozzle pads like these https://amzn.eu/d/3o5EpX4

Print Setting:

Filament: I would recommend a more durable material like PETG or ASA but PLA should work okay (I used a generic PLA+ variant and it seems to have held up fine after at least 50 hours of print time)

Apart from filament just use your normal print setting but slower and with supports. Also, make sure to orientate the part like the photo above.

Assembly:

Place and stick the pads into the indention of the part and then just clip the part onto the heat chain where it connect to the print bed. Then all you need to do is change your gcode and you are good to go.

Gcode sample:(Make sure to check if your x gcode is the same as mine as they could be different if so just change the high and low x values to the ones that span your silicone pad. Also, make sure to add any bed calibration gcode to this if you are using it.)

G90 ; use absolute coordinates

M83 ; extruder relative mode

G28 ; home all axis

G1 Z50 F240

G1 X2 Y10 F3000

M140 S{first_layer_bed_temperature[0]} ; set final bed temp

M104 S150 ; set temporary nozzle temp

M190 S{first_layer_bed_temperature[0]} ; wait for bed temp to stabilize

G0 Y220 F9000;

G0 Z10 F9000; Set Height, Important! Check and calibrate for your brush and nozzle height

;wipe

G0 Y235 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y235 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y234 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y234 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y233 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

G0 X0 F9000; return to limits

G0 Y220 F9000;

M104 S{first_layer_temperature[0]} ; set final nozzle temp

M109 S{first_layer_temperature[0]} ; wait for nozzle temp to stabilize

G0 X0 F9000;

G0 Y220 F9000;

G0 Z10 F9000; Set Height, Important! Check and calibrate for your brush and nozzle height

;wipe

G0 Y235 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y235 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y234 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y234 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

;wipe

G0 Y234 F9000;

G0 X40 F9000;

G0 X70 F9000;

G0 X40 F9000;

G0 X0 F9000; return to limits

G0 Y220 F9000;

G1 Z0.28 F240

G92 E0

G1 Y140 E10 F1500 ; prime the nozzle

G1 X2.3 F5000

G92 E0

G1 Y10 E10 F1200 ; prime the nozzle

G92 E0

Ender 3 S1 Pro Nozzle Brush

0.2mm layer, 2 walls, 15% infill

Original