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Real-time filament diameter measurement and control

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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
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10
Marlin/Marlin.h
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@ -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];