extended M106 Macro

macro_M106.cfg

[gcode_macro M106]
description: Custom fan control feature that allows slicers like Orca or S3D to adopt bambu lab-specific auxiliary fan control to define the speed of the auxiliary cooling fan, or exhaust fan
rename_existing: M106.1
gcode:
  ## Original macro can be found somewhere in the Orca Discord. Thank you, dude!
  ## this has some changes, so the order of the parameters S and P does not matter and the fan control value is specified as float 0.0 - 1.0

  ## Define the device names of the controlled fans here. If you're not running a specific type of fan, remove it and the macro will have no effect

  ## Define the mapping between the bambu lab fans and the fan_generic fans defined
  ## These are the names you gave to the fans in your printer.cfg

  ## NOTE: ensure P0 is left as "fan". This is important as you cannot set the
  ## standard part cooling fan Using the set_fan_speed command.
  ## This is accounted for in the macro and handled appropriately.
  {% set fan_map = ({
      "P0": "fan",
      "P1": "BENTO_mini",
      "P2": "aux_fan1",
    })
  %}
 
  ## Divide the params given into an array split on a singular whitespace
  {% set split_params = rawparams.split(" ") %}
  
  
  ## if we've had more than one paramater passed define requested fan and speed
  ## if one paramater is passed, assume were asking for the part cooling fan
  {% if split_params|length == 1 %}
    {% set requested_fan = "P0" %}
    {% set fan_speed = rawparams %}
  {% else %}
    {% set value_1, value_2 = split_params %}
    ## Check order in which the parameters were entered and set the values ​​at the correct position
    {% if 'P' in value_1 %}
      {% set requested_fan = value_1 %}
      {% set fan_speed = value_2 %}
    {% else %}
      {% set requested_fan = value_2 %}
      {% set fan_speed = value_1 %} 
    {% endif %}
  {% endif %}
  

  ## check to ensure the requested fan is mapped
  ## this allows us to safely ignore commands for fans were not using
  {% if requested_fan in fan_map %}
 
    ## define the target fan device as per the above map
    {% set target_fan = fan_map[requested_fan] %}
 
    # If the target fan is the part cooling fan, just use the standard M106.
    {% if target_fan == "fan" %}
      M106.1 {fan_speed}
    {% else %}
 
      ## strip the leading S from the fan speed
      {% if fan_speed[0:1] == "S" %}
        {% set fan_speed = fan_speed[1:] %}
      {% endif %}
 
      ## Convert the 0-255 fan percentage to a percentage out of 100
      ## and round it to an int
      {% set fan_percentage = (fan_speed|int / 255 * 100)|round(0) %}
      ## divide by 100 to get the value 0.0 - 1.0
      {% set fan_klipperval = (fan_percentage|float / 100) %}
 
      ## Set the requested fan speed on the target fan
      SET_FAN_SPEED fan={target_fan} speed={fan_klipperval}
      ## M118 SET_FAN_SPEED fan={target_fan} speed={fan_klipperval}
    {% endif %}
  {% endif %}