fan_scale.cfg

[gcode_macro M106]
description: Override M106 with scale/offset and optional override
rename_existing: M106.1

# How much to scale the value
variable_scale: 1.0

# Any offset to add to the fan, after the value is scaled.
variable_offset: 0.0

# Used at runtime to provide override.
# DO NOT MODIFY
variable_override_active: 0
variable_override_value: 0.0


gcode:
  {% set s_raw = params.S|default(255)|int %}

  {% if s_raw <= 0 %}
    M107
  {% else %}
    {% set s_norm = s_raw / 255.0 %}

    {% if override_active %}
      {% set s_eff = override_value %}
    {% else %}
      {% set s_eff = (s_norm * scale) + offset %}
    {% endif %}

    {% if s_eff < 0.0 %}
      {% set s_eff = 0.0 %}
    {% endif %}
    {% if s_eff > 1.0 %}
      {% set s_eff = 1.0 %}
    {% endif %}

    M106.1 S{s_eff * 255.0}
  {% endif %}


[gcode_macro TEST_FAN_TUNING]

# Test the scale and offset parametes of the overriden M106 fan macro.
# Also allows an override value to be set. If overridden, any value set on the fan
# will use the override value, except if 0 is set, 0 is written.
# Normal operation follows this formula: new_fan = (old_fan * SCALE) + OFFSET
#
#  P A R A M E T E R S :
# SCALE: float to scale the fan with
# OFFSET: float to add after scaling
# OVERRIDE: float to set as raw speed (no scaling and offset!).
#           Takes effect until this macro is called again *without* OVERRIDE.
#           If the macro is called parameterless, it just clears any active overrride.
#

description: Live fan tuning and override control
gcode:
  {% if 'SCALE' in params %}
    SET_GCODE_VARIABLE MACRO=M106 VARIABLE=scale VALUE={params.SCALE|float}
  {% endif %}

  {% if 'OFFSET' in params %}
    SET_GCODE_VARIABLE MACRO=M106 VARIABLE=offset VALUE={params.OFFSET|float}
  {% endif %}

  {% if 'OVERRIDE' in params %}
    {% set ov = params.OVERRIDE|float %}
    {% if ov < 0.0 %}{% set ov = 0.0 %}{% endif %}
    {% if ov > 1.0 %}{% set ov = 1.0 %}{% endif %}
    SET_GCODE_VARIABLE MACRO=M106 VARIABLE=override_value VALUE={ov}
    SET_GCODE_VARIABLE MACRO=M106 VARIABLE=override_active VALUE=1
  {% else %}
    SET_GCODE_VARIABLE MACRO=M106 VARIABLE=override_active VALUE=0
  {% endif %}