diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h index 46d6b96dd..45c6ea486 100644 --- a/Marlin/Configuration.h +++ b/Marlin/Configuration.h @@ -755,6 +755,36 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of //#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). 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 +#define STANDARD_DIA 1.12837915 //The diameter of filament that has a cross sectional area of 1 square mm. This dia should be used in the slicer software settings + + + + + + + #include "Configuration_adv.h" #include "thermistortables.h" diff --git a/Marlin/Marlin.h b/Marlin/Marlin.h index 062b6d43c..3fb6ec553 100644 --- a/Marlin/Marlin.h +++ b/Marlin/Marlin.h @@ -229,6 +229,16 @@ extern int EtoPPressure; extern unsigned char fanSpeedSoftPwm; #endif +#ifdef FILAMENT_SENSOR + extern volatile float filament_width_nominal; //holds the theoretical filament diameter ie., 3.00 or 1.75 + extern volatile 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]; diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp index b373e2213..48d867c83 100644 --- a/Marlin/Marlin_main.cpp +++ b/Marlin/Marlin_main.cpp @@ -157,6 +157,10 @@ // M400 - Finish all moves // M401 - Lower z-probe if present // M402 - Raise z-probe if present +// M404 - N 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 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. @@ -296,6 +300,18 @@ int EtoPPressure=0; bool cancel_heatup = false ; +#ifdef FILAMENT_SENSOR + //Variables for Filament Sensor input + volatile float filament_width_nominal=DEFAULT_NOMINAL_FILAMENT_DIA; //Set nominal filament width, can be changed with M404 + volatile 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; + int delay_index2=0; //index into ring buffer + float delay_dist=0; //delay distance counter + int meas_delay_cm = MEASUREMENT_DELAY_CM; //distance delay setting +#endif + //=========================================================================== //=============================Private Variables============================= //=========================================================================== @@ -2317,7 +2333,13 @@ void process_commands() } } else { //reserved for setting filament diameter via UFID or filament measuring device - break; + if(active_extruder == FILAMENT_SENSOR_EXTRUDER_NUM){ + radius = analog2widthFil() * 0.5; + area = M_PI * pow(radius, 2); + }else{ + area = 1.0; + } + } tmp_extruder = active_extruder; if(code_seen('T')) { @@ -2771,6 +2793,66 @@ void process_commands() } 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; + + filament_sensor = true ; + 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; + + //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 + { + + filament_width_meas = code_value(); + + SERIAL_PROTOCOLPGM("Filament dia (measured mm):"); + SERIAL_PROTOCOLLN(filament_width_meas); + } + break; + #endif + + + + + case 500: // M500 Store settings in EEPROM { Config_StoreSettings(); diff --git a/Marlin/pins.h b/Marlin/pins.h index c3644a086..1ec236a07 100644 --- a/Marlin/pins.h +++ b/Marlin/pins.h @@ -558,6 +558,15 @@ #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 @@ -1692,6 +1701,9 @@ #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 @@ -2326,6 +2338,10 @@ DaveX plan for Teensylu/printrboard-type pinouts (ref teensylu & sprinter) for a #endif #endif //ULTRA_LCD +#ifdef FILAMENT_SENSOR + //Filip added pin for Filament sensor analog input + #define FILWIDTH_PIN 3 +#endif //FILAMENT_SENSOR #endif diff --git a/Marlin/planner.cpp b/Marlin/planner.cpp index 5b20f86f9..fefae6e18 100644 --- a/Marlin/planner.cpp +++ b/Marlin/planner.cpp @@ -117,6 +117,10 @@ static long x_segment_time[3]={MAX_FREQ_TIME + 1,0,0}; // Segment times (in 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) { @@ -737,6 +741,33 @@ block->steps_y = labs((target[X_AXIS]-position[X_AXIS]) - (target[Y_AXIS]-positi 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(filament_sensor && (extruder==0)) //only for extruder 0 + { + delay_dist = delay_dist + delta_mm[E_AXIS]; //increment counter with next move in e axis + if (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 + if(delay_dist<0) + delay_dist = delay_dist + 10*(MAX_MEASUREMENT_DELAY+1); //loop around the buffer + delay_index1=delay_dist/10; //calculate index + 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 + 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 diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp index a10c255af..467b6dbdb 100644 --- a/Marlin/temperature.cpp +++ b/Marlin/temperature.cpp @@ -71,7 +71,10 @@ unsigned char soft_pwm_bed; #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============================ //=========================================================================== @@ -158,6 +161,9 @@ unsigned long watchmillis[EXTRUDERS] = ARRAY_BY_EXTRUDERS(0,0,0); #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 ============================ //=========================================================================== @@ -601,6 +607,21 @@ void manage_heater() } #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 adjust as a factor to the Standard Diameter (has an area of 1mm squared) + //then square it to get an area + volumetric_multiplier[FILAMENT_SENSOR_EXTRUDER_NUM] = pow((float)(100+measurement_delay[meas_shift_index])/filament_width_nominal*STANDARD_DIA/100.0,2); + } +#endif } #define PGM_RD_W(x) (short)pgm_read_word(&x) @@ -702,6 +723,40 @@ static void updateTemperaturesFromRawValues() 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 an volumetric ratio +int widthFil_to_size_ratio() { + +float temp; + +#if (FILWIDTH_PIN > -1) //check if a sensor is supported +filament_width_meas=current_raw_filwidth/16383.0*5.0; +#endif + +temp=filament_width_meas; +if(filament_width_measMEASURED_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)) @@ -797,6 +852,17 @@ void tp_init() #endif #endif + //Added for Filament Sensor + #ifdef FILAMENT_SENSOR + #if defined(FILWIDTH_PIN) && (FILWIDTH_PIN > -1) + #if FILWIDTH_PIN < 8 + DIDR0 |= 1< 1) || defined(HEATERS_PARALLEL) @@ -1122,6 +1188,10 @@ ISR(TIMER0_COMPB_vect) 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) { @@ -1248,10 +1318,39 @@ ISR(TIMER0_COMPB_vect) #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< -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: @@ -1260,7 +1359,7 @@ ISR(TIMER0_COMPB_vect) // 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. { @@ -1276,6 +1375,12 @@ ISR(TIMER0_COMPB_vect) #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; diff --git a/Marlin/temperature.h b/Marlin/temperature.h index df2b5deac..ca4efabec 100644 --- a/Marlin/temperature.h +++ b/Marlin/temperature.h @@ -31,6 +31,14 @@ 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];