Merge pull request #10754 from comps/fan-max-pwm-scaling

[2.0.x] Add FAN_MAX_PWM

Marlin/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/default/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Anet/A6/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Anet/A8/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Azteeg/X5GT/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/BIBO/TouchX/cyclops/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/BIBO/TouchX/default/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/BQ/Hephestos/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/BQ/WITBOX/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Cartesio/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Creality/CR-10/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Creality/CR-10S/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Creality/CR-10mini/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Creality/CR-8/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Creality/Ender-2/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Creality/Ender-3/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Creality/Ender-4/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Felix/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/FolgerTech/i3-2020/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Geeetech/Prusa i3 Pro C/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Geeetech/Prusa i3 Pro W/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Infitary/i3-M508/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/JGAurora/A5/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/MakerParts/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Malyan/M150/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Malyan/M200/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Micromake/C1/enhanced/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Mks/Sbase/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/RigidBot/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/SCARA/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Sanguinololu/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/TheBorg/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/TinyBoy2/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/UltiMachine/Archim2/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Velleman/K8400/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/Wanhao/Duplicator 6/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/delta/FLSUN/kossel/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/delta/generic/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/delta/kossel_mini/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/delta/kossel_pro/Configuration_adv.h

@@ -213,10 +213,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/delta/kossel_xl/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/gCreate/gMax1.5+/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/makibox/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/tvrrug/Round2/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/config/examples/wt150/Configuration_adv.h

@@ -208,10 +208,20 @@
 // before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
 //#define FAN_KICKSTART_TIME 100
 
-// This defines the minimal speed for the main fan, run in PWM mode
-// to enable uncomment and set minimal PWM speed for reliable running (1-255)
-// if fan speed is [1 - (FAN_MIN_PWM-1)] it is set to FAN_MIN_PWM
+/**
+ * PWM Fan Scaling
+ *
+ * Define the min/max speeds for PWM fans (as set with M106).
+ *
+ * With these options the M106 0-255 value range is scaled to a subset
+ * to ensure that the fan has enough power to spin, or to run lower
+ * current fans with higher current. (e.g., 5V/12V fans with 12V/24V)
+ * Value 0 always turns off the fan.
+ *
+ * Define one or both of these to override the default 0-255 range.
+ */
 //#define FAN_MIN_PWM 50
+//#define FAN_MAX_PWM 128
 
 // @section extruder
 

Marlin/src/inc/Conditionals_post.h

@@ -979,6 +979,23 @@
  */
 #define HAS_FANMUX PIN_EXISTS(FANMUX0)
 
+/**
+ * MIN/MAX fan PWM scaling
+ */
+#ifndef FAN_MIN_PWM
+  #define FAN_MIN_PWM 0
+#endif
+#ifndef FAN_MAX_PWM
+  #define FAN_MAX_PWM 255
+#endif
+#if FAN_MIN_PWM < 0 || FAN_MIN_PWM > 255
+  #error "FAN_MIN_PWM must be a value from 0 to 255."
+#elif FAN_MAX_PWM < 0 || FAN_MAX_PWM > 255
+  #error "FAN_MAX_PWM must be a value from 0 to 255."
+#elif FAN_MIN_PWM > FAN_MAX_PWM
+  #error "FAN_MIN_PWM must be less than or equal to FAN_MAX_PWM."
+#endif
+
 /**
  * Bed Probe dependencies
  */

Marlin/src/module/planner.cpp

@@ -1108,8 +1108,8 @@ void Planner::check_axes_activity() {
 
     #endif // FAN_KICKSTART_TIME > 0
 
-    #ifdef FAN_MIN_PWM
-      #define CALC_FAN_SPEED(f) (tail_fan_speed[f] ? ( FAN_MIN_PWM + (tail_fan_speed[f] * (255 - FAN_MIN_PWM)) / 255 ) : 0)
+    #if FAN_MIN_PWM != 0 || FAN_MAX_PWM != 255
+      #define CALC_FAN_SPEED(f) (tail_fan_speed[f] ? map(tail_fan_speed[f], 1, 255, FAN_MIN_PWM, FAN_MAX_PWM) : 0)
     #else
       #define CALC_FAN_SPEED(f) tail_fan_speed[f]
     #endif