Clean up Filament Width Sensor comments

Marlin/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/Cartesio/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/Felix/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/Felix/DUAL/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/Hephestos/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/Hephestos_2/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         2.00  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.60  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         2.00 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.60 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/K8200/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/K8400/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/K8400/Dual-head/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/RigidBot/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/SCARA/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/TAZ4/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/TinyBoy2/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 1.75  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 1.75   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/WITBOX/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/adafruit/ST7565/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/delta/flsun_kossel_mini/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 1.75  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 1.75   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/delta/generic/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/delta/kossel_mini/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/delta/kossel_pro/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/delta/kossel_xl/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/makibox/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif
 

Marlin/example_configurations/tvrrug/Round2/Configuration.h

 // With this option servos are powered only during movement, then turned off to prevent jitter.
 //#define DEACTIVATE_SERVOS_AFTER_MOVE
 
-/**********************************************************************\
- * Support for a filament diameter sensor
- * Also allows adjustment of diameter at print time (vs  at slicing)
- * Single extruder only at this point (extruder 0)
- *
- * Motherboards
- * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector
- * 81 - Printrboard - Uses Analog input 2 on the Exp1 connector (version B,C,D,E)
- * 301 - Rambo  - uses Analog input 3
- * Note may require analog pins to be defined for different motherboards
- **********************************************************************/
-// Uncomment below to enable
+/**
+ * Filament Width Sensor
+ *
+ * Measures the filament width in real-time and adjusts
+ * flow rate to compensate for any irregularities.
+ *
+ * Also allows the measured filament diameter to set the
+ * extrusion rate, so the slicer only has to specify the
+ * volume.
+ *
+ * Only a single extruder is supported at this time.
+ *
+ *  34 RAMPS_14    : Analog input 5 on the AUX2 connector
+ *  81 PRINTRBOARD : Analog input 2 on the Exp1 connector (version B,C,D,E)
+ * 301 RAMBO       : Analog input 3
+ *
+ * Note: May require analog pins to be defined for other boards.
+ */
 //#define FILAMENT_WIDTH_SENSOR
 
-#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00  //Enter the diameter (in mm) of the filament generally used (3.0 mm or 1.75 mm) - this is then used in the slicer software.  Used for sensor reading validation
+#define DEFAULT_NOMINAL_FILAMENT_DIA 3.00   // (mm) Diameter of the filament generally used (3.0 or 1.75mm), also used in the slicer. Used to validate sensor reading.
 
 #if ENABLED(FILAMENT_WIDTH_SENSOR)
-  #define FILAMENT_SENSOR_EXTRUDER_NUM 0   //The number of the extruder that has the filament sensor (0,1,2)
-  #define MEASUREMENT_DELAY_CM        14   //measurement delay in cm.  This is the distance from filament sensor to middle of barrel
+  #define FILAMENT_SENSOR_EXTRUDER_NUM 0    // Index of the extruder that has the filament sensor (0,1,2,3)
+  #define MEASUREMENT_DELAY_CM        14    // (cm) The distance from the filament sensor to the melting chamber
 
-  #define MEASURED_UPPER_LIMIT         3.30  //upper limit factor used for sensor reading validation in mm
-  #define MEASURED_LOWER_LIMIT         1.90  //lower limit factor for sensor reading validation in mm
-  #define MAX_MEASUREMENT_DELAY       20     //delay buffer size in bytes (1 byte = 1cm)- limits maximum measurement delay allowable (must be larger than MEASUREMENT_DELAY_CM  and lower number saves RAM)
+  #define MEASURED_UPPER_LIMIT         3.30 // (mm) Upper limit used to validate sensor reading
+  #define MEASURED_LOWER_LIMIT         1.90 // (mm) Lower limit used to validate sensor reading
+  #define MAX_MEASUREMENT_DELAY       20    // (bytes) Buffer size for stored measurements (1 byte per cm). Must be larger than MEASUREMENT_DELAY_CM.
 
-  #define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially
+  #define DEFAULT_MEASURED_FILAMENT_DIA DEFAULT_NOMINAL_FILAMENT_DIA // Set measured to nominal initially
 
-  //When using an LCD, uncomment the line below to display the Filament sensor data on the last line instead of status.  Status will appear for 5 sec.
+  // Display filament width on the LCD status line. Status messages will expire after 5 seconds.
   //#define FILAMENT_LCD_DISPLAY
 #endif