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Improvements and bug fixes in sensor delay buffer for filament sensor code

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Improvement to avoid reinitializing delay buffer with every print. Fixed
issues in buffer indexing and memory out of bounds due to floating point
imprecision.  Simplified the code by avoiding conversion to standard
diameter and 1cu mm extrusion, which caused complications in determining
mm extruded.
This commit is contained in:
Filip Mulier
2014-08-16 06:50:13 -05:00
parent 85649a4549
commit 62db9848d3
4 changed files with 59 additions and 35 deletions
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22
Marlin/temperature.cpp
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@ -617,9 +617,16 @@ void manage_heater()
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);
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
}
@ -715,6 +722,9 @@ static void updateTemperaturesFromRawValues()
#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();
@ -731,15 +741,11 @@ return current_raw_filwidth/16383.0*5.0;
//return current_raw_filwidth;
}
// For converting raw Filament Width to an volumetric ratio
// For converting raw Filament Width to a 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_meas<MEASURED_LOWER_LIMIT)
temp=filament_width_nominal; //assume sensor cut out