bissen21/Marlin_Firmware
1
0
Fork 0
Code Issues Pull Requests Projects Releases 4 Wiki Activity

Real-time filament diameter measurement and control

Browse Source 
This feature allows the printer to read the filament diameter
automatically and adjust the printer in real time.  Added code to read
an analog voltage that represents a filament diameter measurement.  This
measurement is delayed in a ring buffer to compensate for sensors that
are a distance away from the extruder.  The measurement is used to
adjust the volumetric_multiplier for the extruder.  Some additional g
codes (M404, M405, M406, M407) are used to set parameters and turn
on/off the control. g code M221 is updated.  Pins for RAMPS1.4, RAMBO,
and Printrboard are identified for analog input.  The configuration file
is updated with relevant user parameters.
This commit is contained in:
Filip Mulier
2014-08-06 19:30:57 -05:00
parent 1d0fe035f3
commit 85649a4549
7 changed files with 289 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
Marlin/planner.cpp
View File

@ -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