Nozzle Cleaning Brush (Ender 5 S1 / 2020 Mount)

I wanted a nozzle cleaning solution for my Ender 5 S1 - this is the result.

It mounts on the 2020 Z axis rail just over the edge of the rear right corner of the bed, you can snap it on to the 2020 rail or attach it properly with a couple of V-nuts.

It weighs in at less than 22g (including supports) when printed in PLA.

You can use the head of one of those toothbrush shaped nozzle cleaning brushes - or really anything that's safe to use on a printer nozzle.

If the brush head doesn't fit in tight enough there are two M2 holes you can optionally use with small cable ties to hold the brush in if you don't wish to glue it down.

I've added two M3 holes on the top in case you want to mount something else on top (ADXL345, limit switch etc….).

I printed it with a 0.6mm nozzle, 0.24mm layer height, 3 perimeters and 15% infill which takes about 30 minutes to print on the Ender 5 S1 at medium speeds.

The model has been oriented for optimal printing using Tweaker3.

Cooling duct based on a design by NathanBuildsRobots.

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Bed Meshing / Safe Homing

Depending on the mods you're running you'll need to tweak your bed_mesh to avoid hitting the brush.

These are my settings - but please find your maximum Y (or X) and configure for your setup - you can do so by placing a piece of paper on the bed where the brush would sit and tune your settings so that the nozzle / cooling doesn't reach the paper during meshing.

[safe_z_home]
home_xy_position: 152,110
speed: 150
z_hop: 20
z_hop_speed: 10

[bed_mesh]
speed: 180
mesh_min: 6,6
mesh_max: 180,190
probe_count: 10,10
fade_start: 1
fade_end: 10
fade_target: 0
algorithm: bicubic
...

All my printer configs are publicly available at in a Github repo, feel free to use them but remember - always tune for verify the safety for your own setup.

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Nozzle Cleaning GCODE

Note: Edit and tune this for your own printer - don't copy verbatim!

Only use this as a reference, your X/Y/Z coordinates could be different and you may have different variables available.

#####################################
#        Nozzle Clean Macro         #
#####################################

# Origionally forked from https://github.com/rootiest/zippy-klipper_config/blob/master/extras/CLEAN_NOZZLE.cfg @ v1.5

# Sam's nozzle brush - 1.0
# https://www.printables.com/model/450432
# housing: X150, Y200, Z30
# brush: X180, Y210 -> 220, Z24

[gcode_macro CLEAN_NOZZLE]
variable_start_x: 180
variable_start_y: 220
variable_start_z: 24
variable_end_x: 110
variable_end_y: 110
variable_end_z: 10
variable_end_z_use_current: False ; if True, use current Z position +2 (for safety) as end Z
variable_wipe_axis: 'X' ; wipe side to side
variable_wipe_dist: 30
variable_wipe_qty: 3
variable_wipe_spd: 50
variable_raise_distance: 30
variable_extruder_name: 'extruder'
variable_extruder_temp: 0 # 180
variable_output: 118
variable_pre_hot: True
variable_led_status: False
variable_status_heat: 'STATUS_HEATING'
variable_status_clean: 'STATUS_CLEANING'
variable_ready_status: 'STATUS_READY'
gcode:
    HOME_IF_NEEDED

    # Get the current Z position
    {% set current_z = printer.toolhead.position[2] %}
    {% set nozzle_targ = params.TARGET|default(0)|float %}
    {% set is_hot = params.HOT|default(pre_hot|string) %}
    {% if is_hot|lower == "false" %}
        {% if led_status == True %}
            {status_heat}
        {% endif %}
        M{output} Heating extruder..
        {% if nozzle_targ > 0 %}
            SET_HEATER_TEMPERATURE HEATER={extruder_name} TARGET={nozzle_targ}
            TEMPERATURE_WAIT SENSOR={extruder_name} MINIMUM={nozzle_targ}
        {% elif extruder_temp > 0 %}
            SET_HEATER_TEMPERATURE HEATER={extruder_name} TARGET={extruder_temp}
            TEMPERATURE_WAIT SENSOR={extruder_name} MINIMUM={extruder_temp}
        {% endif %}
    {% endif %}
    G90    ; absolute positioning

    ## Raise nozzle
    G1 Z{raise_distance}
    ## Move nozzle to start position
    G1 X{start_x} Y{start_y} F6000
    G1 Z{start_z} F1500
    # Set lighting
    {% if led_status == True %}
        {status_clean}
    {% endif %}
    ## Wipe nozzle
    RESPOND TYPE=command MSG="Wiping nozzle"
    M{output} Wiping nozzle..
    {% for wipes in range(1, (wipe_qty + 1)) %}
        {% if wipe_axis|lower == 'x' %}
            G1 X{start_x + wipe_dist} F{wipe_spd * 60}
            G1 X{start_x} F{wipe_spd * 60}
        {% elif wipe_axis|lower == 'y' %}
            G1 Y{start_y + wipe_dist} F{wipe_spd * 60}
            G1 Y{start_y} F{wipe_spd * 60}
        {% else %}
            M{output} INVALID WIPE AXIS CONFIGURATION
        {% endif %}
    {% endfor %}

    ## Raise nozzle, then move to end X/Y position
    G1 Z{raise_distance}
    G1 X{end_x} Y{end_y} F6000

    # Set end Z position
    {% if end_z_use_current == True %}
        {% set end_z = current_z + 2 %}
    {% endif %}

    # Move to end Z position
    G1 Z{end_z} F1500

    # Turn off extruder if needed
    {% if is_hot|lower == "false" %}
        M{output} Cooling extruder..
        SET_HEATER_TEMPERATURE HEATER={extruder_name} TARGET=0
    {% endif %}

    # Set lighting
    {% if led_status == True %}
        {status_ready}
    {% endif %}

    M{output} Completed nozzle wipe