Merge https://github.com/ErikZalm/Marlin into Marlin_v1

Marlin/Configuration.h

 #define SERIAL_PORT 0
 
 // This determines the communication speed of the printer
-// This determines the communication speed of the printer
 #define BAUDRATE 250000
 
 // This enables the serial port associated to the Bluetooth interface
 // 33 = RAMPS 1.3 / 1.4 (Power outputs: Extruder, Fan, Bed)
 // 34 = RAMPS 1.3 / 1.4 (Power outputs: Extruder0, Extruder1, Bed)
 // 35 = RAMPS 1.3 / 1.4 (Power outputs: Extruder, Fan, Fan)
+// 36 = RAMPS 1.3 / 1.4 (Power outputs: Extruder0, Extruder1, Fan)
 // 4  = Duemilanove w/ ATMega328P pin assignment
 // 5  = Gen6
 // 51 = Gen6 deluxe
 // 10 is 100k RS thermistor 198-961 (4.7k pullup)
 // 11 is 100k beta 3950 1% thermistor (4.7k pullup)
 // 12 is 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup) (calibrated for Makibox hot bed)
+// 13 is 100k Hisens 3950  1% up to 300°C for hotend "Simple ONE " & "Hotend "All In ONE" 
 // 20 is the PT100 circuit found in the Ultimainboard V2.x
 // 60 is 100k Maker's Tool Works Kapton Bed Thermistor beta=3950
 //
                                   // is more then PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
   #define PID_INTEGRAL_DRIVE_MAX 255  //limit for the integral term
   #define K1 0.95 //smoothing factor within the PID
-  #define PID_dT ((OVERSAMPLENR * 8.0)/(F_CPU / 64.0 / 256.0)) //sampling period of the temperature routine
+  #define PID_dT ((OVERSAMPLENR * 10.0)/(F_CPU / 64.0 / 256.0)) //sampling period of the temperature routine
 
 // If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 // Ultimaker
 //#define SERVO_ENDSTOPS {-1, -1, 0} // Servo index for X, Y, Z. Disable with -1
 //#define SERVO_ENDSTOP_ANGLES {0,0, 0,0, 70,0} // X,Y,Z Axis Extend and Retract angles
 
+/**********************************************************************\
+ * 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 Aux 2 connector
+ * 301 - Rambo  - uses Analog input 3
+ * Note may require analog pins to be defined for different motherboards
+ **********************************************************************/
+#define FILAMENT_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 DEFAULT_NOMINAL_FILAMENT_DIA  3.0  //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 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)
+
+//defines used in the code
+#define DEFAULT_MEASURED_FILAMENT_DIA  DEFAULT_NOMINAL_FILAMENT_DIA  //set measured to nominal initially 
+
+
+
+
+
+
+
 #include "Configuration_adv.h"
 #include "thermistortables.h"
 

Marlin/ConfigurationStore.cpp

   EEPROM_WRITE_VAR(i,max_xy_jerk);
   EEPROM_WRITE_VAR(i,max_z_jerk);
   EEPROM_WRITE_VAR(i,max_e_jerk);
-  EEPROM_WRITE_VAR(i,add_homeing);
+  EEPROM_WRITE_VAR(i,add_homing);
   #ifdef DELTA
   EEPROM_WRITE_VAR(i,endstop_adj);
   EEPROM_WRITE_VAR(i,delta_radius);
     SERIAL_ECHO_START;
     SERIAL_ECHOLNPGM("Home offset (mm):");
     SERIAL_ECHO_START;
-    SERIAL_ECHOPAIR("  M206 X",add_homeing[0] );
-    SERIAL_ECHOPAIR(" Y" ,add_homeing[1] );
-    SERIAL_ECHOPAIR(" Z" ,add_homeing[2] );
+    SERIAL_ECHOPAIR("  M206 X",add_homing[0] );
+    SERIAL_ECHOPAIR(" Y" ,add_homing[1] );
+    SERIAL_ECHOPAIR(" Z" ,add_homing[2] );
     SERIAL_ECHOLN("");
 #ifdef DELTA
     SERIAL_ECHO_START;
         EEPROM_READ_VAR(i,max_xy_jerk);
         EEPROM_READ_VAR(i,max_z_jerk);
         EEPROM_READ_VAR(i,max_e_jerk);
-        EEPROM_READ_VAR(i,add_homeing);
+        EEPROM_READ_VAR(i,add_homing);
         #ifdef DELTA
 		EEPROM_READ_VAR(i,endstop_adj);
 		EEPROM_READ_VAR(i,delta_radius);
     max_xy_jerk=DEFAULT_XYJERK;
     max_z_jerk=DEFAULT_ZJERK;
     max_e_jerk=DEFAULT_EJERK;
-    add_homeing[0] = add_homeing[1] = add_homeing[2] = 0;
+    add_homing[0] = add_homing[1] = add_homing[2] = 0;
 #ifdef DELTA
 	endstop_adj[0] = endstop_adj[1] = endstop_adj[2] = 0;
 	delta_radius= DELTA_RADIUS;

Marlin/Marlin.h

 extern int extruder_multiply[EXTRUDERS]; // sets extrude multiply factor (in percent) for each extruder individually
 extern float volumetric_multiplier[EXTRUDERS]; // reciprocal of cross-sectional area of filament (in square millimeters), stored this way to reduce computational burden in planner
 extern float current_position[NUM_AXIS] ;
-extern float add_homeing[3];
+extern float add_homing[3];
 #ifdef DELTA
 extern float endstop_adj[3];
 extern float delta_radius;
 extern unsigned char fanSpeedSoftPwm;
 #endif
 
+#ifdef FILAMENT_SENSOR
+  extern float filament_width_nominal;  //holds the theoretical filament diameter ie., 3.00 or 1.75 
+  extern bool filament_sensor;  //indicates that filament sensor readings should control extrusion  
+  extern float filament_width_meas; //holds the filament diameter as accurately measured 
+  extern signed char measurement_delay[];  //ring buffer to delay measurement
+  extern int delay_index1, delay_index2;  //index into ring buffer
+  extern float delay_dist; //delay distance counter
+  extern int meas_delay_cm; //delay distance
+#endif
+
 #ifdef FWRETRACT
 extern bool autoretract_enabled;
 extern bool retracted[EXTRUDERS];

Marlin/MarlinSerial.cpp

   bool useU2X = true;
 
 #if F_CPU == 16000000UL && SERIAL_PORT == 0
-  // hard coded exception for compatibility with the bootloader shipped
+  // hard-coded exception for compatibility with the bootloader shipped
   // with the Duemilanove and previous boards and the firmware on the 8U2
   // on the Uno and Mega 2560.
   if (baud == 57600) {

Marlin/Marlin_main.cpp

 // M400 - Finish all moves
 // M401 - Lower z-probe if present
 // M402 - Raise z-probe if present
+// M404 - N<dia in mm> Enter the nominal filament width (3mm, 1.75mm ) or will display nominal filament width without parameters
+// M405 - Turn on Filament Sensor extrusion control.  Optional D<delay in cm> to set delay in centimeters between sensor and extruder 
+// M406 - Turn off Filament Sensor extrusion control 
+// M407 - Displays measured filament diameter 
 // M500 - stores parameters in EEPROM
 // M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
 // M502 - reverts to the default "factory settings".  You still need to store them in EEPROM afterwards if you want to.
   #endif
 };
 float current_position[NUM_AXIS] = { 0.0, 0.0, 0.0, 0.0 };
-float add_homeing[3]={0,0,0};
+float add_homing[3]={0,0,0};
 #ifdef DELTA
 float endstop_adj[3]={0,0,0};
 #endif
 
 bool cancel_heatup = false ;
 
+#ifdef FILAMENT_SENSOR
+  //Variables for Filament Sensor input 
+  float filament_width_nominal=DEFAULT_NOMINAL_FILAMENT_DIA;  //Set nominal filament width, can be changed with M404 
+  bool filament_sensor=false;  //M405 turns on filament_sensor control, M406 turns it off 
+  float filament_width_meas=DEFAULT_MEASURED_FILAMENT_DIA; //Stores the measured filament diameter 
+  signed char measurement_delay[MAX_MEASUREMENT_DELAY+1];  //ring buffer to delay measurement  store extruder factor after subtracting 100 
+  int delay_index1=0;  //index into ring buffer
+  int delay_index2=-1;  //index into ring buffer - set to -1 on startup to indicate ring buffer needs to be initialized
+  float delay_dist=0; //delay distance counter  
+  int meas_delay_cm = MEASUREMENT_DELAY_CM;  //distance delay setting
+#endif
+
 //===========================================================================
 //=============================Private Variables=============================
 //===========================================================================
 const char axis_codes[NUM_AXIS] = {'X', 'Y', 'Z', 'E'};
 static float destination[NUM_AXIS] = {  0.0, 0.0, 0.0, 0.0};
+
+#ifndef DELTA
 static float delta[3] = {0.0, 0.0, 0.0};
+#endif
+
 static float offset[3] = {0.0, 0.0, 0.0};
 static bool home_all_axis = true;
 static float feedrate = 1500.0, next_feedrate, saved_feedrate;
   #endif
 }
 
+
 void setup()
 {
   setup_killpin();
   st_init();    // Initialize stepper, this enables interrupts!
   setup_photpin();
   servo_init();
+  
 
   lcd_init();
   _delay_ms(1000);	// wait 1sec to display the splash screen
 
 static float x_home_pos(int extruder) {
   if (extruder == 0)
-    return base_home_pos(X_AXIS) + add_homeing[X_AXIS];
+    return base_home_pos(X_AXIS) + add_homing[X_AXIS];
   else
     // In dual carriage mode the extruder offset provides an override of the
     // second X-carriage offset when homed - otherwise X2_HOME_POS is used.
       return;
     }
     else if (dual_x_carriage_mode == DXC_DUPLICATION_MODE && active_extruder == 0) {
-      current_position[X_AXIS] = base_home_pos(X_AXIS) + add_homeing[X_AXIS];
-      min_pos[X_AXIS] =          base_min_pos(X_AXIS) + add_homeing[X_AXIS];
-      max_pos[X_AXIS] =          min(base_max_pos(X_AXIS) + add_homeing[X_AXIS],
+      current_position[X_AXIS] = base_home_pos(X_AXIS) + add_homing[X_AXIS];
+      min_pos[X_AXIS] =          base_min_pos(X_AXIS) + add_homing[X_AXIS];
+      max_pos[X_AXIS] =          min(base_max_pos(X_AXIS) + add_homing[X_AXIS],
                                   max(extruder_offset[X_AXIS][1], X2_MAX_POS) - duplicate_extruder_x_offset);
       return;
     }
      
      for (i=0; i<2; i++)
      {
-        delta[i] -= add_homeing[i];
+        delta[i] -= add_homing[i];
      } 
      
-    // SERIAL_ECHOPGM("addhome X="); SERIAL_ECHO(add_homeing[X_AXIS]);
-	// SERIAL_ECHOPGM(" addhome Y="); SERIAL_ECHO(add_homeing[Y_AXIS]);
+    // SERIAL_ECHOPGM("addhome X="); SERIAL_ECHO(add_homing[X_AXIS]);
+	// SERIAL_ECHOPGM(" addhome Y="); SERIAL_ECHO(add_homing[Y_AXIS]);
     // SERIAL_ECHOPGM(" addhome Theta="); SERIAL_ECHO(delta[X_AXIS]);
     // SERIAL_ECHOPGM(" addhome Psi+Theta="); SERIAL_ECHOLN(delta[Y_AXIS]);
       
    } 
    else
    {
-      current_position[axis] = base_home_pos(axis) + add_homeing[axis];
-      min_pos[axis] =          base_min_pos(axis) + add_homeing[axis];
-      max_pos[axis] =          base_max_pos(axis) + add_homeing[axis];
+      current_position[axis] = base_home_pos(axis) + add_homing[axis];
+      min_pos[axis] =          base_min_pos(axis) + add_homing[axis];
+      max_pos[axis] =          base_max_pos(axis) + add_homing[axis];
    }
 #else
-  current_position[axis] = base_home_pos(axis) + add_homeing[axis];
-  min_pos[axis] =          base_min_pos(axis) + add_homeing[axis];
-  max_pos[axis] =          base_max_pos(axis) + add_homeing[axis];
+  current_position[axis] = base_home_pos(axis) + add_homing[axis];
+  min_pos[axis] =          base_min_pos(axis) + add_homing[axis];
+  max_pos[axis] =          base_max_pos(axis) + add_homing[axis];
 #endif
 }
 
           HOMEAXIS(Z);
 
           calculate_delta(current_position);
-          plan_set_position(delta[X_AXIS], delta[Y_AXIS], delta[Z_AXIS], current_position[E_AXIS]);		  
-		  
+          plan_set_position(delta[X_AXIS], delta[Y_AXIS], delta[Z_AXIS], current_position[E_AXIS]);
+
 #else // NOT DELTA
 
       home_all_axis = !((code_seen(axis_codes[X_AXIS])) || (code_seen(axis_codes[Y_AXIS])) || (code_seen(axis_codes[Z_AXIS])));
-	  
+
       #if Z_HOME_DIR > 0                      // If homing away from BED do Z first
       if((home_all_axis) || (code_seen(axis_codes[Z_AXIS]))) {
         HOMEAXIS(Z);
 		#ifdef SCARA
 		   current_position[X_AXIS]=code_value();
 		#else
-		   current_position[X_AXIS]=code_value()+add_homeing[0];
+		   current_position[X_AXIS]=code_value()+add_homing[0];
 		#endif
         }
       }
          #ifdef SCARA
 		   current_position[Y_AXIS]=code_value();
 		#else
-		   current_position[Y_AXIS]=code_value()+add_homeing[1];
+		   current_position[Y_AXIS]=code_value()+add_homing[1];
 		#endif
         }
       }
 
       if(code_seen(axis_codes[Z_AXIS])) {
         if(code_value_long() != 0) {
-          current_position[Z_AXIS]=code_value()+add_homeing[2];
+          current_position[Z_AXIS]=code_value()+add_homing[2];
         }
       }
       #ifdef ENABLE_AUTO_BED_LEVELING
                 	current_position[i] = code_value();  
 		}
 		else {
-                current_position[i] = code_value()+add_homeing[i];  
+                current_position[i] = code_value()+add_homing[i];  
             	}  
 #else
-		current_position[i] = code_value()+add_homeing[i];
+		current_position[i] = code_value()+add_homing[i];
 #endif
             plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
            }
       SERIAL_PROTOCOLLN("");
       
       SERIAL_PROTOCOLPGM("SCARA Cal - Theta:");
-      SERIAL_PROTOCOL(delta[X_AXIS]+add_homeing[0]);
+      SERIAL_PROTOCOL(delta[X_AXIS]+add_homing[0]);
       SERIAL_PROTOCOLPGM("   Psi+Theta (90):");
-      SERIAL_PROTOCOL(delta[Y_AXIS]-delta[X_AXIS]-90+add_homeing[1]);
+      SERIAL_PROTOCOL(delta[Y_AXIS]-delta[X_AXIS]-90+add_homing[1]);
       SERIAL_PROTOCOLLN("");
       
       SERIAL_PROTOCOLPGM("SCARA step Cal - Theta:");
         } else {
           //reserved for setting filament diameter via UFID or filament measuring device
           break;
+        
+          
         }
         tmp_extruder = active_extruder;
         if(code_seen('T')) {
       if(code_seen('E')) max_e_jerk = code_value() ;
     }
     break;
-    case 206: // M206 additional homeing offset
+    case 206: // M206 additional homing offset
       for(int8_t i=0; i < 3; i++)
       {
-        if(code_seen(axis_codes[i])) add_homeing[i] = code_value();
+        if(code_seen(axis_codes[i])) add_homing[i] = code_value();
       }
 	  #ifdef SCARA
 	   if(code_seen('T'))       // Theta
       {
-        add_homeing[0] = code_value() ;
+        add_homing[0] = code_value() ;
       }
       if(code_seen('P'))       // Psi
       {
-        add_homeing[1] = code_value() ;
+        add_homing[1] = code_value() ;
       }
 	  #endif
       break;
     }
     break;
 #endif
+
+#ifdef FILAMENT_SENSOR
+case 404:  //M404 Enter the nominal filament width (3mm, 1.75mm ) N<3.0> or display nominal filament width 
+    {
+    #if (FILWIDTH_PIN > -1) 
+    if(code_seen('N')) filament_width_nominal=code_value();
+    else{
+    SERIAL_PROTOCOLPGM("Filament dia (nominal mm):"); 
+    SERIAL_PROTOCOLLN(filament_width_nominal); 
+    }
+    #endif
+    }
+    break; 
+    
+    case 405:  //M405 Turn on filament sensor for control 
+    {
+    
+    
+    if(code_seen('D')) meas_delay_cm=code_value();
+       
+       if(meas_delay_cm> MAX_MEASUREMENT_DELAY)
+       	meas_delay_cm = MAX_MEASUREMENT_DELAY;
+    
+       if(delay_index2 == -1)  //initialize the ring buffer if it has not been done since startup
+    	   {
+    	   int temp_ratio = widthFil_to_size_ratio(); 
+       	    
+       	    for (delay_index1=0; delay_index1<(MAX_MEASUREMENT_DELAY+1); ++delay_index1 ){
+       	              measurement_delay[delay_index1]=temp_ratio-100;  //subtract 100 to scale within a signed byte
+       	        }
+       	    delay_index1=0;
+       	    delay_index2=0;	
+    	   }
+    
+    filament_sensor = true ; 
+    
+    //SERIAL_PROTOCOLPGM("Filament dia (measured mm):"); 
+    //SERIAL_PROTOCOL(filament_width_meas); 
+    //SERIAL_PROTOCOLPGM("Extrusion ratio(%):"); 
+    //SERIAL_PROTOCOL(extrudemultiply); 
+    } 
+    break; 
+    
+    case 406:  //M406 Turn off filament sensor for control 
+    {      
+    filament_sensor = false ; 
+    } 
+    break; 
+  
+    case 407:   //M407 Display measured filament diameter 
+    { 
+     
+    
+    
+    SERIAL_PROTOCOLPGM("Filament dia (measured mm):"); 
+    SERIAL_PROTOCOLLN(filament_width_meas);   
+    } 
+    break; 
+    #endif
+    
+
+
+
+
     case 500: // M500 Store settings in EEPROM
     {
         Config_StoreSettings();

Marlin/example_configurations/delta/Configuration.h

 //===========================================================================
 //============================= DELTA Printer ===============================
 //===========================================================================
-// For a Delta printer rplace the configuration files wilth the files in the
+// For a Delta printer replace the configuration files with the files in the
 // example_configurations/delta directory.
 //
 
 // 702= Minitronics v1.0
 // 90 = Alpha OMCA board
 // 91 = Final OMCA board
-// 301 = Rambo
+// 301= Rambo
 // 21 = Elefu Ra Board (v3)
 
 #ifndef MOTHERBOARD
 
 #define POWER_SUPPLY 1
 
-// Define this to have the electronics keep the powersupply off on startup. If you don't know what this is leave it.
+// Define this to have the electronics keep the power supply off on startup. If you don't know what this is leave it.
 // #define PS_DEFAULT_OFF
 
 //===========================================================================
 // and processor overload (too many expensive sqrt calls).
 #define DELTA_SEGMENTS_PER_SECOND 200
 
-// NOTE NB all values for DELTA_* values MOUST be floating point, so always have a decimal point in them
+// NOTE NB all values for DELTA_* values MUST be floating point, so always have a decimal point in them
 
 // Center-to-center distance of the holes in the diagonal push rods.
 #define DELTA_DIAGONAL_ROD 250.0 // mm
 // 0 is not used
 // 1 is 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
 // 2 is 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
-// 3 is mendel-parts thermistor (4.7k pullup)
+// 3 is Mendel-parts thermistor (4.7k pullup)
 // 4 is 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
 // 5 is 100K thermistor - ATC Semitec 104GT-2 (Used in ParCan & J-Head) (4.7k pullup)
 // 6 is 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)
 // 8 is 100k 0603 SMD Vishay NTCS0603E3104FXT (4.7k pullup)
 // 9 is 100k GE Sensing AL03006-58.2K-97-G1 (4.7k pullup)
 // 10 is 100k RS thermistor 198-961 (4.7k pullup)
-// 60 is 100k Maker's Tool Works Kapton Bed Thermister
+// 60 is 100k Maker's Tool Works Kapton Bed Thermistor
 //
 //    1k ohm pullup tables - This is not normal, you would have to have changed out your 4.7k for 1k
 //                          (but gives greater accuracy and more stable PID)
 // 51 is 100k thermistor - EPCOS (1k pullup)
 // 52 is 200k thermistor - ATC Semitec 204GT-2 (1k pullup)
 // 55 is 100k thermistor - ATC Semitec 104GT-2 (Used in ParCan & J-Head) (1k pullup)
+//
+// 1047 is Pt1000 with 4k7 pullup
+// 1010 is Pt1000 with 1k pullup (non standard)
+// 147 is Pt100 with 4k7 pullup
+// 110 is Pt100 with 1k pullup (non standard)
 
 #define TEMP_SENSOR_0 -1
 #define TEMP_SENSOR_1 -1
 // HEATER_BED_DUTY_CYCLE_DIVIDER intervals.
 //#define HEATER_BED_DUTY_CYCLE_DIVIDER 4
 
+// If you want the M105 heater power reported in watts, define the BED_WATTS, and (shared for all extruders) EXTRUDER_WATTS
+//#define EXTRUDER_WATTS (12.0*12.0/6.7) //  P=I^2/R
+//#define BED_WATTS (12.0*12.0/1.1)      // P=I^2/R
+
 // PID settings:
 // Comment the following line to disable PID and enable bang-bang.
 #define PIDTEMP
   #define K1 0.95 //smoothing factor within the PID
   #define PID_dT ((16.0 * 8.0)/(F_CPU / 64.0 / 256.0)) //sampling period of the temperature routine
 
-// If you are using a preconfigured hotend then you can use one of the value sets by uncommenting it
+// If you are using a pre-configured hotend then you can use one of the value sets by uncommenting it
 // Ultimaker
     #define  DEFAULT_Kp 22.2
     #define  DEFAULT_Ki 1.08
     #define  DEFAULT_Kd 114
 
-// Makergear
+// MakerGear
 //    #define  DEFAULT_Kp 7.0
 //    #define  DEFAULT_Ki 0.1
 //    #define  DEFAULT_Kd 12
 #define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors
 
 #ifndef ENDSTOPPULLUPS
-  // fine Enstop settings: Individual Pullups. will be ignored if ENDSTOPPULLUPS is defined
+  // fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined
   // #define ENDSTOPPULLUP_XMAX
   // #define ENDSTOPPULLUP_YMAX
   // #define ENDSTOPPULLUP_ZMAX
   #define BACK_PROBE_BED_POSITION 180
   #define FRONT_PROBE_BED_POSITION 20
 
-  // these are the offsets to the prob relative to the extruder tip (Hotend - Probe)
+  // these are the offsets to the probe relative to the extruder tip (Hotend - Probe)
   #define X_PROBE_OFFSET_FROM_EXTRUDER -25
   #define Y_PROBE_OFFSET_FROM_EXTRUDER -29
   #define Z_PROBE_OFFSET_FROM_EXTRUDER -12.35
 //  #define PROBE_SERVO_DEACTIVATION_DELAY 300
 
 
-//If you have enabled the Bed Auto Levelling and are using the same Z Probe for Z Homing,
+//If you have enabled the Bed Auto Leveling and are using the same Z Probe for Z Homing,
 //it is highly recommended you let this Z_SAFE_HOMING enabled!!!
 
   #define Z_SAFE_HOMING   // This feature is meant to avoid Z homing with probe outside the bed area.
 //Manual homing switch locations:
 
 #define MANUAL_HOME_POSITIONS  // MANUAL_*_HOME_POS below will be used
-// For deltabots this means top and center of the cartesian print volume.
+// For deltabots this means top and center of the Cartesian print volume.
 #define MANUAL_X_HOME_POS 0
 #define MANUAL_Y_HOME_POS 0
 #define MANUAL_Z_HOME_POS 250 // For delta: Distance between nozzle and print surface after homing.
 //===========================================================================
 
 // EEPROM
-// the microcontroller can store settings in the EEPROM, e.g. max velocity...
-// M500 - stores paramters in EEPROM
+// The microcontroller can store settings in the EEPROM, e.g. max velocity...
+// M500 - stores parameters in EEPROM
 // M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
 // M502 - reverts to the default "factory settings".  You still need to store them in EEPROM afterwards if you want to.
-//define this to enable eeprom support
+//define this to enable EEPROM support
 //#define EEPROM_SETTINGS
 //to disable EEPROM Serial responses and decrease program space by ~1700 byte: comment this out:
 // please keep turned on if you can.
 #define ABS_PREHEAT_FAN_SPEED 255   // Insert Value between 0 and 255
 
 //LCD and SD support
-//#define ULTRA_LCD  //general lcd support, also 16x2
+//#define ULTRA_LCD  //general LCD support, also 16x2
 //#define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
 //#define SDSUPPORT // Enable SD Card Support in Hardware Console
 //#define SDSLOW // Use slower SD transfer mode (not normally needed - uncomment if you're getting volume init error)
 //#define ENCODER_PULSES_PER_STEP 1 // Increase if you have a high resolution encoder
 //#define ENCODER_STEPS_PER_MENU_ITEM 5 // Set according to ENCODER_PULSES_PER_STEP or your liking
-//#define ULTIMAKERCONTROLLER //as available from the ultimaker online store.
-//#define ULTIPANEL  //the ultipanel as on thingiverse
+//#define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+//#define ULTIPANEL  //the UltiPanel as on Thingiverse
 
 // The MaKr3d Makr-Panel with graphic controller and SD support
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
     #define LCD_WIDTH 20
     #define LCD_HEIGHT 4
   #endif
-#else //no panel but just lcd
+#else //no panel but just LCD
   #ifdef ULTRA_LCD
   #ifdef DOGLCD // Change number of lines to match the 128x64 graphics display
     #define LCD_WIDTH 20
 // Increase the FAN pwm frequency. Removes the PWM noise but increases heating in the FET/Arduino
 //#define FAST_PWM_FAN
 
-// Temperature status leds that display the hotend and bet temperature.
-// If alle hotends and bed temperature and temperature setpoint are < 54C then the BLUE led is on.
+// Temperature status LEDs that display the hotend and bet temperature.
+// If all hotends and bed temperature and temperature setpoint are < 54C then the BLUE led is on.
 // Otherwise the RED led is on. There is 1C hysteresis.
 //#define TEMP_STAT_LEDS
 

Marlin/language.h

 	#define MSG_AUTOSTART "Autostart"
 	#define MSG_DISABLE_STEPPERS "Disable steppers"
 	#define MSG_AUTO_HOME "Auto home"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Set origin"
 	#define MSG_PREHEAT_PLA "Preheat PLA"
 	#define MSG_PREHEAT_PLA0 "Preheat PLA 1"
 	#define MSG_AUTOSTART "Autostart"
 	#define MSG_DISABLE_STEPPERS "Wylacz silniki"
 	#define MSG_AUTO_HOME "Auto. poz. zerowa"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Ustaw punkt zero"
 	#define MSG_PREHEAT_PLA "Rozgrzej PLA"
 	#define MSG_PREHEAT_PLA0 "Rozgrzej PLA 1"
 	#define MSG_AUTOSTART "Demarrage auto"
 	#define MSG_DISABLE_STEPPERS "Arreter moteurs"
 	#define MSG_AUTO_HOME "Home auto."
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Regler origine"
 	#define MSG_PREHEAT_PLA " Prechauffage PLA"
 	#define MSG_PREHEAT_PLA0 "Prechauff. PLA 1"
-        #define MSG_PREHEAT_PLA1 "Prechauff. PLA 2"
+    #define MSG_PREHEAT_PLA1 "Prechauff. PLA 2"
 	#define MSG_PREHEAT_PLA2 "Prechauff. PLA 3"
 	#define MSG_PREHEAT_PLA012 "Prech. PLA Tout"
 	#define MSG_PREHEAT_PLA_BEDONLY "Prech. PLA Plateau"
 	#define MSG_AUTOSTART        "Autostart"
 	#define MSG_DISABLE_STEPPERS "Stepper abschalt."
 	#define MSG_AUTO_HOME        "Auto Nullpunkt"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN       "Setze Nullpunkt"
 	#define MSG_PREHEAT_PLA      "Vorwärmen PLA"
 	#define MSG_PREHEAT_PLA0     "Vorwärmen PLA 1"
 	#define MSG_AUTOSTART " Autostart"
 	#define MSG_DISABLE_STEPPERS "Apagar motores"
 	#define MSG_AUTO_HOME "Llevar al origen"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Establecer cero"
 	#define MSG_PREHEAT_PLA "Precalentar PLA"
 	#define MSG_PREHEAT_PLA0 "Precalentar PLA 1"
 	#define MSG_AUTOSTART						"Автостарт"
 	#define MSG_DISABLE_STEPPERS 				"Выкл. двигатели"
 	#define MSG_AUTO_HOME						"Парковка"
+	#define MSG_SET_HOME_OFFSETS				"Set home offsets"
 	#define MSG_SET_ORIGIN						"Запомнить ноль"
 	#define MSG_PREHEAT_PLA 					"Преднагрев PLA"
 	#define MSG_PREHEAT_PLA0					"Преднагрев PLA0"
 	#define MSG_KILLED							"УБИТО."
 	#define MSG_STOPPED							"ОСТАНОВЛЕНО."
 	#define MSG_CONTROL_RETRACT					"Откат mm:"
-	#define MSG_CONTROL_RETRACT_SWAP				"своп Откат mm:"
+	#define MSG_CONTROL_RETRACT_SWAP			"своп Откат mm:"
 	#define MSG_CONTROL_RETRACTF				"Откат  V:"
 	#define MSG_CONTROL_RETRACT_ZLIFT			"Прыжок mm:"
 	#define MSG_CONTROL_RETRACT_RECOVER			"Возврат +mm:"
-	#define MSG_CONTROL_RETRACT_RECOVER_SWAP		"своп Возврат +mm:"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP	"своп Возврат +mm:"
 	#define MSG_CONTROL_RETRACT_RECOVERF		"Возврат  V:"
 	#define MSG_AUTORETRACT						"АвтоОткат:"
 	#define MSG_FILAMENTCHANGE 					"Change filament"
 	#define MSG_AUTOSTART            "Autostart"
 	#define MSG_DISABLE_STEPPERS     "Disabilita Motori"
 	#define MSG_AUTO_HOME            "Auto Home"
+	#define MSG_SET_HOME_OFFSETS     "Set home offsets"
 	#define MSG_SET_ORIGIN           "Imposta Origine"
 	#define MSG_PREHEAT_PLA          "Preriscalda PLA"
 	#define MSG_PREHEAT_PLA0         "Preriscalda PLA 1"
 	#define MSG_AUTOSTART "Autostart"
 	#define MSG_DISABLE_STEPPERS " Apagar motores"
 	#define MSG_AUTO_HOME "Ir para origen"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Estabelecer orig."
 	#define MSG_PREHEAT_PLA "Pre-aquecer PLA"
 	#define MSG_PREHEAT_PLA0 " pre-aquecer PLA 1"
 	#define MSG_AUTOSTART "Automaatti"
 	#define MSG_DISABLE_STEPPERS "Vapauta moottorit"
 	#define MSG_AUTO_HOME "Aja referenssiin"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Aseta origo"
 	#define MSG_PREHEAT_PLA "Esilammita PLA"
 	#define MSG_PREHEAT_PLA0 "Esilammita PLA 1"
 	#define MSG_AUTOSTART " Autostart"
 	#define MSG_DISABLE_STEPPERS "Amortar motors"
 	#define MSG_AUTO_HOME "Levar a l'orichen"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Establir zero"
 	#define MSG_PREHEAT_PLA "Precalentar PLA"
 	#define MSG_PREHEAT_PLA0 "Precalentar PLA0"
 	#define MSG_AUTOSTART "Autostart"
 	#define MSG_DISABLE_STEPPERS "Motoren uit"
 	#define MSG_AUTO_HOME "Auto home"
+	#define MSG_SET_HOME_OFFSETS "Set home offsets"
 	#define MSG_SET_ORIGIN "Nulpunt instellen"
 	#define MSG_PREHEAT_PLA "PLA voorverwarmen"
 	#define MSG_PREHEAT_PLA0 "PLA voorverw. 0"

Marlin/motion_control.cpp

   if (angular_travel < 0) { angular_travel += 2*M_PI; }
   if (isclockwise) { angular_travel -= 2*M_PI; }
   
+  //20141002:full circle for G03 did not work, e.g. G03 X80 Y80 I20 J0 F2000 is giving an Angle of zero so head is not moving
+  //to compensate when start pos = target pos && angle is zero -> angle = 2Pi
+  if (position[axis_0] == target[axis_0] && position[axis_1] == target[axis_1] && angular_travel == 0)
+  {
+	  angular_travel += 2*M_PI;
+  }
+  //end fix G03
+  
   float millimeters_of_travel = hypot(angular_travel*radius, fabs(linear_travel));
   if (millimeters_of_travel < 0.001) { return; }
   uint16_t segments = floor(millimeters_of_travel/MM_PER_ARC_SEGMENT);

Marlin/pins.h

 * Arduino Mega pin assignment
 *
 ****************************************************************************************/
-#if MOTHERBOARD == 3 || MOTHERBOARD == 33 || MOTHERBOARD == 34 || MOTHERBOARD == 35 || MOTHERBOARD == 77 || MOTHERBOARD == 67 || MOTHERBOARD == 68
+#if MOTHERBOARD == 3 || MOTHERBOARD == 33 || MOTHERBOARD == 34 || MOTHERBOARD == 35 || MOTHERBOARD == 36 || MOTHERBOARD == 77 || MOTHERBOARD == 67 || MOTHERBOARD == 68
 #define KNOWN_BOARD 1
 
 //////////////////FIX THIS//////////////
 // #define RAMPS_V_1_0
 
 
-#if MOTHERBOARD == 33 || MOTHERBOARD == 34 || MOTHERBOARD == 35 || MOTHERBOARD == 77 || MOTHERBOARD == 67 || MOTHERBOARD == 68
+#if MOTHERBOARD == 33 || MOTHERBOARD == 34 || MOTHERBOARD == 35 || MOTHERBOARD == 36 ||  MOTHERBOARD == 77 || MOTHERBOARD == 67 || MOTHERBOARD == 68
 
   #define LARGE_FLASH true
 
     #define E1_DIR_PIN         34
     #define E1_ENABLE_PIN      30
 
+#if MOTHERBOARD == 34  //FMM added for Filament Extruder
+#ifdef FILAMENT_SENSOR
+	  //define analog pin for the filament width sensor input
+	  //Use the RAMPS 1.4 Analog input 5 on the AUX2 connector
+      #define FILWIDTH_PIN        5
+#endif
+#endif
+
+
     #if MOTHERBOARD == 68
       #define E2_STEP_PIN        23
       #define E2_DIR_PIN         25
     #define FAN_PIN            4 // IO pin. Buffer needed
   #endif
 
-  #if MOTHERBOARD == 77
+  #if MOTHERBOARD == 77 || MOTHERBOARD == 36
     #define FAN_PIN            8
   #endif
 
     #define TEMP_2_PIN         -1   // ANALOG NUMBERING
   #endif
 
-  #if MOTHERBOARD == 35
+  #if MOTHERBOARD == 35 || MOTHERBOARD == 36
     #define HEATER_BED_PIN     -1    // NO BED
   #else
     #if MOTHERBOARD == 77
   #define Z_STOP_PIN         36
   #define TEMP_0_PIN          1  // Extruder / Analog pin numbering
   #define TEMP_BED_PIN        0  // Bed / Analog pin numbering
+  #ifdef FILAMENT_SENSOR
+   #define FILWIDTH_PIN        2
+  #endif //FILAMENT_SENSOR
 #endif
 
 #define TEMP_1_PIN         -1
 #define Z_DIR_PIN          28
 #define Z_STOP_PIN         30
 
-#define E0_STEP_PIN         17
-#define E0_DIR_PIN          21
+#define E0_STEP_PIN        17
+#define E0_DIR_PIN         21
 
 #define LED_PIN            -1
 
   #endif
 #endif //ULTRA_LCD
 
+#ifdef FILAMENT_SENSOR
+  //Filip added pin for Filament sensor analog input 
+  #define FILWIDTH_PIN        3
+#endif //FILAMENT_SENSOR
 
 #endif
 

Marlin/planner.cpp

 static long y_segment_time[3]={MAX_FREQ_TIME + 1,0,0};
 #endif
 
+#ifdef FILAMENT_SENSOR
+ static char meas_sample; //temporary variable to hold filament measurement sample
+#endif
+
 // Returns the index of the next block in the ring buffer
 // NOTE: Removed modulo (%) operator, which uses an expensive divide and multiplication.
 static int8_t next_block_index(int8_t block_index) {
   block->nominal_speed = block->millimeters * inverse_second; // (mm/sec) Always > 0
   block->nominal_rate = ceil(block->step_event_count * inverse_second); // (step/sec) Always > 0
 
+#ifdef FILAMENT_SENSOR
+  //FMM update ring buffer used for delay with filament measurements
+  
+  
+    if((extruder==FILAMENT_SENSOR_EXTRUDER_NUM) && (delay_index2 > -1))  //only for extruder with filament sensor and if ring buffer is initialized
+  	  {
+    delay_dist = delay_dist + delta_mm[E_AXIS];  //increment counter with next move in e axis
+  
+    while (delay_dist >= (10*(MAX_MEASUREMENT_DELAY+1)))  //check if counter is over max buffer size in mm
+      	  delay_dist = delay_dist - 10*(MAX_MEASUREMENT_DELAY+1);  //loop around the buffer
+    while (delay_dist<0)
+    	  delay_dist = delay_dist + 10*(MAX_MEASUREMENT_DELAY+1); //loop around the buffer
+      
+    delay_index1=delay_dist/10.0;  //calculate index
+    
+    //ensure the number is within range of the array after converting from floating point
+    if(delay_index1<0)
+    	delay_index1=0;
+    else if (delay_index1>MAX_MEASUREMENT_DELAY)
+    	delay_index1=MAX_MEASUREMENT_DELAY;
+    	
+    if(delay_index1 != delay_index2)  //moved index
+  	  {
+    	meas_sample=widthFil_to_size_ratio()-100;  //subtract off 100 to reduce magnitude - to store in a signed char
+  	  }
+    while( delay_index1 != delay_index2)
+  	  {
+  	  delay_index2 = delay_index2 + 1;
+  	if(delay_index2>MAX_MEASUREMENT_DELAY)
+  			  delay_index2=delay_index2-(MAX_MEASUREMENT_DELAY+1);  //loop around buffer when incrementing
+  	  if(delay_index2<0)
+  		delay_index2=0;
+  	  else if (delay_index2>MAX_MEASUREMENT_DELAY)
+  		delay_index2=MAX_MEASUREMENT_DELAY;  
+  	  
+  	  measurement_delay[delay_index2]=meas_sample;
+  	  }
+    	
+    
+  	  }
+#endif
+
+
   // Calculate and limit speed in mm/sec for each axis
   float current_speed[4];
   float speed_factor = 1.0; //factor <=1 do decrease speed

Marlin/stepper.cpp

   pinMode(Y_MS1_PIN,OUTPUT);
   pinMode(Y_MS2_PIN,OUTPUT);
   pinMode(Z_MS1_PIN,OUTPUT);
-  pinMode(Z_MS2_PIN,OUTPUT);  
+  pinMode(Z_MS2_PIN,OUTPUT);
   pinMode(E0_MS1_PIN,OUTPUT);
   pinMode(E0_MS2_PIN,OUTPUT);
   for(int i=0;i<=4;i++) microstep_mode(i,microstep_modes[i]);

Marlin/temperature.cpp

 #ifdef BABYSTEPPING
   volatile int babystepsTodo[3]={0,0,0};
 #endif
-  
+
+#ifdef FILAMENT_SENSOR
+  int current_raw_filwidth = 0;  //Holds measured filament diameter - one extruder only
+#endif  
 //===========================================================================
 //=============================private variables============================
 //===========================================================================
 #define SOFT_PWM_SCALE 0
 #endif
 
+#ifdef FILAMENT_SENSOR
+  static int meas_shift_index;  //used to point to a delayed sample in buffer for filament width sensor
+#endif
 //===========================================================================
 //=============================   functions      ============================
 //===========================================================================
       }
     #endif
   #endif
+  
+//code for controlling the extruder rate based on the width sensor 
+#ifdef FILAMENT_SENSOR
+  if(filament_sensor) 
+	{
+	meas_shift_index=delay_index1-meas_delay_cm;
+		  if(meas_shift_index<0)
+			  meas_shift_index = meas_shift_index + (MAX_MEASUREMENT_DELAY+1);  //loop around buffer if needed
+		  
+		  //get the delayed info and add 100 to reconstitute to a percent of the nominal filament diameter
+		  //then square it to get an area
+		  
+		  if(meas_shift_index<0)
+			  meas_shift_index=0;
+		  else if (meas_shift_index>MAX_MEASUREMENT_DELAY)
+			  meas_shift_index=MAX_MEASUREMENT_DELAY;
+		  
+		     volumetric_multiplier[FILAMENT_SENSOR_EXTRUDER_NUM] = pow((float)(100+measurement_delay[meas_shift_index])/100.0,2);
+		     if (volumetric_multiplier[FILAMENT_SENSOR_EXTRUDER_NUM] <0.01)
+		    	 volumetric_multiplier[FILAMENT_SENSOR_EXTRUDER_NUM]=0.01;
+	}
+#endif
 }
 
 #define PGM_RD_W(x)   (short)pgm_read_word(&x)
     #ifdef TEMP_SENSOR_1_AS_REDUNDANT
       redundant_temperature = analog2temp(redundant_temperature_raw, 1);
     #endif
+    #ifdef FILAMENT_SENSOR  && (FILWIDTH_PIN > -1)    //check if a sensor is supported 
+      filament_width_meas = analog2widthFil();
+    #endif  
     //Reset the watchdog after we know we have a temperature measurement.
     watchdog_reset();
 
     CRITICAL_SECTION_END;
 }
 
+
+// For converting raw Filament Width to milimeters 
+#ifdef FILAMENT_SENSOR
+float analog2widthFil() { 
+return current_raw_filwidth/16383.0*5.0; 
+//return current_raw_filwidth; 
+} 
+ 
+// For converting raw Filament Width to a ratio 
+int widthFil_to_size_ratio() { 
+ 
+float temp; 
+      
+temp=filament_width_meas;
+if(filament_width_meas<MEASURED_LOWER_LIMIT)
+	temp=filament_width_nominal;  //assume sensor cut out
+else if (filament_width_meas>MEASURED_UPPER_LIMIT)
+	temp= MEASURED_UPPER_LIMIT;
+
+
+return(filament_width_nominal/temp*100); 
+
+
+} 
+#endif
+
+
+
+
+
 void tp_init()
 {
 #if (MOTHERBOARD == 80) && ((TEMP_SENSOR_0==-1)||(TEMP_SENSOR_1==-1)||(TEMP_SENSOR_2==-1)||(TEMP_SENSOR_BED==-1))
     #endif
   #endif
   
+  //Added for Filament Sensor 
+  #ifdef FILAMENT_SENSOR
+   #if defined(FILWIDTH_PIN) && (FILWIDTH_PIN > -1) 
+	#if FILWIDTH_PIN < 8 
+       	   DIDR0 |= 1<<FILWIDTH_PIN;  
+	#else 
+       	   DIDR2 |= 1<<(FILWIDTH_PIN - 8);  
+	#endif 
+   #endif
+  #endif
+  
   // Use timer0 for temperature measurement
   // Interleave temperature interrupt with millies interrupt
   OCR0B = 128;
   static unsigned long raw_temp_1_value = 0;
   static unsigned long raw_temp_2_value = 0;
   static unsigned long raw_temp_bed_value = 0;
-  static unsigned char temp_state = 8;
+  static unsigned char temp_state = 10;
   static unsigned char pwm_count = (1 << SOFT_PWM_SCALE);
   static unsigned char soft_pwm_0;
   #if (EXTRUDERS > 1) || defined(HEATERS_PARALLEL)
   static unsigned char soft_pwm_b;
   #endif
   
+  #if defined(FILWIDTH_PIN) &&(FILWIDTH_PIN > -1)
+   static unsigned long raw_filwidth_value = 0;  //added for filament width sensor
+  #endif
+  
   if(pwm_count == 0){
     soft_pwm_0 = soft_pwm[0];
     if(soft_pwm_0 > 0) { 
       #if defined(TEMP_2_PIN) && (TEMP_2_PIN > -1)
         raw_temp_2_value += ADC;
       #endif
-      temp_state = 0;
-      temp_count++;
+      temp_state = 8;//change so that Filament Width is also measured
+      
       break;
-    case 8: //Startup, delay initial temp reading a tiny bit so the hardware can settle.
+    case 8: //Prepare FILWIDTH 
+     #if defined(FILWIDTH_PIN) && (FILWIDTH_PIN> -1) 
+      #if FILWIDTH_PIN>7 
+         ADCSRB = 1<<MUX5;
+      #else
+         ADCSRB = 0; 
+      #endif 
+      ADMUX = ((1 << REFS0) | (FILWIDTH_PIN & 0x07)); 
+      ADCSRA |= 1<<ADSC; // Start conversion 
+     #endif 
+     lcd_buttons_update();       
+     temp_state = 9; 
+     break; 
+    case 9:   //Measure FILWIDTH 
+     #if defined(FILWIDTH_PIN) &&(FILWIDTH_PIN > -1) 
+     //raw_filwidth_value += ADC;  //remove to use an IIR filter approach 
+      if(ADC>102)  //check that ADC is reading a voltage > 0.5 volts, otherwise don't take in the data.
+        {
+    	raw_filwidth_value= raw_filwidth_value-(raw_filwidth_value>>7);  //multipliy raw_filwidth_value by 127/128
+        
+        raw_filwidth_value= raw_filwidth_value + ((unsigned long)ADC<<7);  //add new ADC reading 
+        }
+     #endif 
+     temp_state = 0;   
+      
+     temp_count++;
+     break;      
+      
+      
+    case 10: //Startup, delay initial temp reading a tiny bit so the hardware can settle.
       temp_state = 0;
       break;
 //    default:
 //      break;
   }
     
-  if(temp_count >= OVERSAMPLENR) // 8 * 16 * 1/(16000000/64/256)  = 131ms.
+  if(temp_count >= OVERSAMPLENR) // 10 * 16 * 1/(16000000/64/256)  = 164ms.
   {
     if (!temp_meas_ready) //Only update the raw values if they have been read. Else we could be updating them during reading.
     {
 #endif
       current_temperature_bed_raw = raw_temp_bed_value;
     }
+
+//Add similar code for Filament Sensor - can be read any time since IIR filtering is used 
+#if defined(FILWIDTH_PIN) &&(FILWIDTH_PIN > -1)
+  current_raw_filwidth = raw_filwidth_value>>10;  //need to divide to get to 0-16384 range since we used 1/128 IIR filter approach 
+#endif
+    
     
     temp_meas_ready = true;
     temp_count = 0;

Marlin/temperature.h

 void tp_init();  //initialize the heating
 void manage_heater(); //it is critical that this is called periodically.
 
+#ifdef FILAMENT_SENSOR
+// For converting raw Filament Width to milimeters 
+ float analog2widthFil(); 
+ 
+// For converting raw Filament Width to an extrusion ratio 
+ int widthFil_to_size_ratio();
+#endif
+
 // low level conversion routines
 // do not use these routines and variables outside of temperature.cpp
 extern int target_temperature[EXTRUDERS];  

Marlin/thermistortables.h

 };
 #endif
 
+#if (THERMISTORHEATER_0 == 13) || (THERMISTORHEATER_1 == 13) || (THERMISTORHEATER_2 == 13) || (THERMISTORBED == 13)
+// Hisens thermistor B25/50 =3950 +/-1%
+
+const short temptable_13[][2] PROGMEM = {
+ {	22.5*OVERSAMPLENR,	300	},
+{	24.125*OVERSAMPLENR,	295	},
+{	25.875*OVERSAMPLENR,	290	},
+{	27.8125*OVERSAMPLENR,	285	},
+{	29.9375*OVERSAMPLENR,	280	},
+{	32.25*OVERSAMPLENR,	275	},
+{	34.8125*OVERSAMPLENR,	270	},
+{	37.625*OVERSAMPLENR,	265	},
+{	40.6875*OVERSAMPLENR,	260	},
+{	44.0625*OVERSAMPLENR,	255	},
+{	47.75*OVERSAMPLENR,	250	},
+{	51.8125*OVERSAMPLENR,	245	},
+{	56.3125*OVERSAMPLENR,	240	},
+{	61.25*OVERSAMPLENR,	235	},
+{	66.75*OVERSAMPLENR,	230	},
+{	72.8125*OVERSAMPLENR,	225	},
+{	79.5*OVERSAMPLENR,	220	},
+{	87*OVERSAMPLENR,	215	},
+{	95.3125*OVERSAMPLENR,	210	},
+{	104.1875*OVERSAMPLENR,	205	},
+{	112.75*OVERSAMPLENR,	200	},
+{	123.125*OVERSAMPLENR,	195	},
+{	135.75*OVERSAMPLENR,	190	},
+{	148.3125*OVERSAMPLENR,	185	},
+{	163.8125*OVERSAMPLENR,	180	},
+{	179*OVERSAMPLENR,	175	},
+{	211.125*OVERSAMPLENR,	170	},
+{	216.125*OVERSAMPLENR,	165	},
+{	236.5625*OVERSAMPLENR,	160	},
+{	258.5*OVERSAMPLENR,	155	},
+{	279.875*OVERSAMPLENR,	150	},
+{	305.375*OVERSAMPLENR,	145	},
+{	333.25*OVERSAMPLENR,	140	},
+{	362.5625*OVERSAMPLENR,	135	},
+{	393.6875*OVERSAMPLENR,	130	},
+{	425*OVERSAMPLENR,	125	},
+{	460.625*OVERSAMPLENR,	120	},
+{	495.1875*OVERSAMPLENR,	115	},
+{	530.875*OVERSAMPLENR,	110	},
+{	567.25*OVERSAMPLENR,	105	},
+{	601.625*OVERSAMPLENR,	100	},
+{	637.875*OVERSAMPLENR,	95	},
+{	674.5625*OVERSAMPLENR,	90	},
+{	710*OVERSAMPLENR,	85	},
+{	744.125*OVERSAMPLENR,	80	},
+{	775.9375*OVERSAMPLENR,	75	},
+{	806.875*OVERSAMPLENR,	70	},
+{	835.1875*OVERSAMPLENR,	65	},
+{	861.125*OVERSAMPLENR,	60	},
+{	884.375*OVERSAMPLENR,	55	},
+{	904.5625*OVERSAMPLENR,	50	},
+{	923.8125*OVERSAMPLENR,	45	},
+{	940.375*OVERSAMPLENR,	40	},
+{	954.625*OVERSAMPLENR,	35	},
+{	966.875*OVERSAMPLENR,	30	},
+{	977.0625*OVERSAMPLENR,	25	},
+{	986*OVERSAMPLENR,	20	},
+{	993.375*OVERSAMPLENR,	15	},
+{	999.5*OVERSAMPLENR,	10	},
+{	1004.5*OVERSAMPLENR,	5	},
+{	1008.5*OVERSAMPLENR,	0	}
+
+ };
+#endif
+
 #if (THERMISTORHEATER_0 == 20) || (THERMISTORHEATER_1 == 20) || (THERMISTORHEATER_2 == 20) || (THERMISTORBED == 20) // PT100 with INA826 amp on Ultimaker v2.0 electronics
 /* The PT100 in the Ultimaker v2.0 electronics has a high sample value for a high temperature.
 This does not match the normal thermistor behaviour so we need to set the following defines */

Marlin/ultralcd.cpp

 }
 #endif
 
+void lcd_set_home_offsets()
+{
+    for(int8_t i=0; i < NUM_AXIS; i++) {
+      if (i != E_AXIS) {
+        add_homing[i] -= current_position[i];
+        current_position[i] = 0.0;
+      }
+    }
+    plan_set_position(0.0, 0.0, 0.0, current_position[E_AXIS]);
+
+    // Audio feedback
+    enquecommand_P(PSTR("M300 S659 P200"));
+    enquecommand_P(PSTR("M300 S698 P200"));
+    lcd_return_to_status();
+}
+
+
 #ifdef BABYSTEPPING
 static void lcd_babystep_x()
 {
     START_MENU();
     MENU_ITEM(back, MSG_MAIN, lcd_main_menu);
     MENU_ITEM_EDIT(int3, MSG_SPEED, &feedmultiply, 10, 999);
+#if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &target_temperature[0], 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_1 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE1, &target_temperature[1], 0, HEATER_1_MAXTEMP - 15);
 #endif
 #endif
     MENU_ITEM(gcode, MSG_DISABLE_STEPPERS, PSTR("M84"));
     MENU_ITEM(gcode, MSG_AUTO_HOME, PSTR("G28"));
+    MENU_ITEM(function, MSG_SET_HOME_OFFSETS, lcd_set_home_offsets);
     //MENU_ITEM(gcode, MSG_SET_ORIGIN, PSTR("G92 X0 Y0 Z0"));
 #if TEMP_SENSOR_0 != 0
   #if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_BED != 0
 
     START_MENU();
     MENU_ITEM(back, MSG_CONTROL, lcd_control_menu);
+#if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &target_temperature[0], 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_1 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE1, &target_temperature[1], 0, HEATER_1_MAXTEMP - 15);
 #endif
     MENU_ITEM_EDIT(int3, MSG_BED, &target_temperature_bed, 0, BED_MAXTEMP - 15);
 #endif
     MENU_ITEM_EDIT(int3, MSG_FAN_SPEED, &fanSpeed, 0, 255);
-#ifdef AUTOTEMP
+#if defined AUTOTEMP && (TEMP_SENSOR_0 != 0)
     MENU_ITEM_EDIT(bool, MSG_AUTOTEMP, &autotemp_enabled);
     MENU_ITEM_EDIT(float3, MSG_MIN, &autotemp_min, 0, HEATER_0_MAXTEMP - 15);
     MENU_ITEM_EDIT(float3, MSG_MAX, &autotemp_max, 0, HEATER_0_MAXTEMP - 15);
     START_MENU();
     MENU_ITEM(back, MSG_TEMPERATURE, lcd_control_temperature_menu);
     MENU_ITEM_EDIT(int3, MSG_FAN_SPEED, &plaPreheatFanSpeed, 0, 255);
+#if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &plaPreheatHotendTemp, 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_BED != 0
     MENU_ITEM_EDIT(int3, MSG_BED, &plaPreheatHPBTemp, 0, BED_MAXTEMP - 15);
 #endif
     START_MENU();
     MENU_ITEM(back, MSG_TEMPERATURE, lcd_control_temperature_menu);
     MENU_ITEM_EDIT(int3, MSG_FAN_SPEED, &absPreheatFanSpeed, 0, 255);
+#if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &absPreheatHotendTemp, 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_BED != 0
     MENU_ITEM_EDIT(int3, MSG_BED, &absPreheatHPBTemp, 0, BED_MAXTEMP - 15);
 #endif

Marlin/ultralcd_implementation_hitachi_HD44780.h

 # endif//LCD_WIDTH > 19
     lcd.setCursor(LCD_WIDTH - 8, 1);
     lcd.print('Z');
-    lcd.print(ftostr32(current_position[Z_AXIS]));
+    lcd.print(ftostr32(current_position[Z_AXIS] + 0.00001));
 #endif//LCD_HEIGHT > 2
 
 #if LCD_HEIGHT > 3

README.md

 *  M400 - Finish all moves
 *  M401 - Lower z-probe if present
 *  M402 - Raise z-probe if present
+*  M404 - N<dia in mm> Enter the nominal filament width (3mm, 1.75mm ) or will display nominal filament width without parameters
+*  M405 - Turn on Filament Sensor extrusion control.  Optional D<delay in cm> to set delay in centimeters between sensor and extruder
+*  M406 - Turn off Filament Sensor extrusion control
+*  M407 - Displays measured filament diameter
 *  M500 - stores paramters in EEPROM
 *  M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
 *  M502 - reverts to the default "factory settings".  You still need to store them in EEPROM afterwards if you want to.