Ender 3 V3 CoreXZ Wiper Mount

This wiper mount is to help with multi-material printing with the Co-Print Chromahead on the Ender 3V3. I have the Plus version of the printer but this should fit the standard version too. 

Requires 2x 10mm M3 screws and a 10-12mmx25mm section of brass/copper brush. You can optionally add a Bambu p1s/x1c wiper. You can hot/super glue the brush into the hole in the mount. If you decide to use the Bambu wiper, use a 8mm M2 screw and 2x M2 nuts to hold the wiper in place.

This will likely not work on stock printers or the stock Chromahead, as the nozzle doesnt move off the bed with the stock carriage. I've installed this carriage modification which lets the nozzle travel outside the bed.

https://www.printables.com/model/1268100-ender-3-v3-plus-x-carriage-for-coprint-chromahead

You can modify your gcode_macro.cfg file and add this code to use the wiper. Note that this code is for the Plus version of the printer, you will have to make changes if you use this on the standard version.


 

[gcode_macro SET_UP_NOZZLE_WIPE]

gcode:

  {% set z_stop = printer.toolhead.axis_maximum.z|int %}

  {% set z_pos = printer.toolhead.position.z|int %}

  # raise the nozzle

  {% if z_pos < (z_stop-6) %}

    G91

    G1 Z5

  {% elif z_pos == z_stop%}

    # dont raise if we are at the top

    G91

  {% else %}

    G91

    G1 Z1

  {% endif %}

  # absolute move

  G90

  # move to the back corner

  G0 Y301 F5000

  G0 X-5 F5000

  # lower nozzle to space outside plate

  G0 Z-1

[gcode_macro MY_NOZZLE_WIPE]

gcode:

  # move to brush and wipe three times

  G0 Y301 F5000

  G0 Y263 F5000

  G0 Y301 F5000

  G0 Y263 F5000

  G0 Y301 F5000

  G0 Y263 F5000

  # raise nozzle

  G0 Z5

[gcode_macro COPRINT_NOZZLE_WIPE]

gcode:

  SET_UP_NOZZLE_WIPE

  MY_NOZZLE_WIPE

You can then use COPRINT_NOZZLE_WIPE in any macro to wipe the nozzle