Merge pull request #1141 from filipmu/Filament-Sensor

Display filament sensor data on a 20x4 LCD or Graphical LCD

Marlin/Configuration.h

  * 
  * Motherboards
  * 34 - RAMPS1.4 - uses Analog input 5 on the AUX2 connector 
- * 81 - Printrboard - Uses Analog input 2 on the Aux 2 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
  **********************************************************************/
 //defines used in the code
 #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.
+//#define FILAMENT_LCD_DISPLAY
 
 
 

Marlin/dogm_lcd_implementation.h

  // Status line
  u8g.setFont(FONT_STATUSMENU);
  u8g.setPrintPos(0,61);
- u8g.print(lcd_status_message);
+ #ifndef FILAMENT_LCD_DISPLAY
+ 	u8g.print(lcd_status_message);
+ #else
+	if(message_millis+5000>millis()){  //Display both Status message line and Filament display on the last line
+	 u8g.print(lcd_status_message);
+ 	}
+ 	else
+	{
+	 lcd_printPGM(PSTR("dia:"));
+	 u8g.print(ftostr12ns(filament_width_meas));
+	 lcd_printPGM(PSTR(" factor:"));
+	 u8g.print(itostr3(extrudemultiply));
+	 u8g.print('%');
+	}
+ #endif 	
 
 }
 

Marlin/ultralcd.cpp

 int absPreheatFanSpeed;
 
 
+#ifdef FILAMENT_LCD_DISPLAY
+unsigned long message_millis=0;
+#endif
+
+
+
 #ifdef ULTIPANEL
 static float manual_feedrate[] = MANUAL_FEEDRATE;
 #endif // ULTIPANEL
         encoderPosition = 0;
         lcd_quick_feedback();
         lcd_implementation_init(); // to maybe revive the LCD if static electricity killed it.
+#ifdef FILAMENT_LCD_DISPLAY
+        message_millis=millis();  //get status message to show up for a while
+#endif
     }
 
 #ifdef ULTIPANEL_FEEDMULTIPLY
         return;
     strncpy(lcd_status_message, message, LCD_WIDTH);
     lcdDrawUpdate = 2;
+#ifdef FILAMENT_LCD_DISPLAY
+        message_millis=millis();  //get status message to show up for a while
+#endif
 }
 void lcd_setstatuspgm(const char* message)
 {
         return;
     strncpy_P(lcd_status_message, message, LCD_WIDTH);
     lcdDrawUpdate = 2;
+#ifdef FILAMENT_LCD_DISPLAY
+        message_millis=millis();  //get status message to show up for a while
+#endif
 }
 void lcd_setalertstatuspgm(const char* message)
 {
   return conv;
 }
 
+//Float to string with 1.23 format
+char *ftostr12ns(const float &x)
+{
+  long xx=x*100;
+  
+  xx=abs(xx);
+  conv[0]=(xx/100)%10+'0';
+  conv[1]='.';
+  conv[2]=(xx/10)%10+'0';
+  conv[3]=(xx)%10+'0';
+  conv[4]=0;
+  return conv;
+}
+
 char *itostr31(const int &xx)
 {
   conv[0]=(xx>=0)?'+':'-';

Marlin/ultralcd.h

   extern int absPreheatFanSpeed;
   
   extern bool cancel_heatup;
+  
+  #ifdef FILAMENT_LCD_DISPLAY
+        extern unsigned long message_millis;
+  #endif
     
   void lcd_buzz(long duration,uint16_t freq);
   bool lcd_clicked();
 char *ftostr31ns(const float &x); // float to string without sign character
 char *ftostr31(const float &x);
 char *ftostr32(const float &x);
+char *ftostr12ns(const float &x); 
 char *ftostr5(const float &x);
 char *ftostr51(const float &x);
 char *ftostr52(const float &x);

Marlin/ultralcd_implementation_hitachi_HD44780.h

     }
 #endif
 
-    //Status message line on the last line
+    //Display both Status message line and Filament display on the last line
+    #ifdef FILAMENT_LCD_DISPLAY
+      if(message_millis+5000>millis()){  //display any status for the first 5 sec after screen is initiated
+         	 lcd.setCursor(0, LCD_HEIGHT - 1);
+        	 lcd.print(lcd_status_message);
+        } else {
+		     lcd.setCursor(0,LCD_HEIGHT - 1);
+		     lcd_printPGM(PSTR("Dia "));
+		     lcd.print(ftostr12ns(filament_width_meas));
+		     lcd_printPGM(PSTR(" V"));
+		     lcd.print(itostr3(100.0*volumetric_multiplier[FILAMENT_SENSOR_EXTRUDER_NUM]));
+    		 lcd.print('%');
+        }
+    #else
     lcd.setCursor(0, LCD_HEIGHT - 1);
     lcd.print(lcd_status_message);
+    #endif
 }
 static void lcd_implementation_drawmenu_generic(uint8_t row, const char* pstr, char pre_char, char post_char)
 {

README.md

 *   Automatic operation of extruder/cold-end cooling fans based on nozzle temperature
 *   RC Servo Support, specify angle or duration for continuous rotation servos.
 *   Bed Auto Leveling.
+*   Support for a filament diameter sensor, which adjusts extrusion volume
 
 The default baudrate is 250000. This baudrate has less jitter and hence errors than the usual 115200 baud, but is less supported by drivers and host-environments.
 
 
 That's it.. enjoy never having to calibrate your Z endstop neither leveling your bed by hand anymore ;-)
 
+Filament Sensor
+---------------
+Supports the use of a real time filament diameter sensor that measures the diameter of the filament going into the extruder and then adjusts the extrusion rate to compensate for filament that does not match what is defined in the g-code.  The diameter can also be displayed on the LCD screen. This potentially eliminates the need to measure filament diameter when changing spools of filament. Gcode becomes independent of the filament diameter. Can also compensate for changing diameter.
 
+For examples of these sensors, see: http://www.thingiverse.com/thing:454584, https://www.youmagine.com/designs/filament-diameter-sensor, http://diy3dprinting.blogspot.com/2014/01/diy-filament-diameter-sensor.html. Any sensor which produces a voltage equivalent to the diameter in mm (i.e. 1v = 1mm) can be used. This provides a very simple interface and may encourage more innovation in this area.
 
+4 new Mcodes are defined to set relevant parameters: M404, M405, M406, M407 - see above.
+
+ Implements a delay buffer to handle the transit delay between where the filament is measured and when it gets to the extruder.