andrey
/
Marlin_FB4S
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

🚩 MPC update (#24253)

FB4S_WIFI
tombrazier 2 years ago
committed by Scott Lahteine
parent
9799907dc9
commit
fc1a620b87
6 changed files with 23 additions and 14 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 6
      Marlin/Configuration.h
  2. 8
      Marlin/src/gcode/temp/M306.cpp
  3. 3
      Marlin/src/module/settings.cpp
  4. 6
      Marlin/src/module/temperature.cpp
  5. 11
      Marlin/src/module/temperature.h
  6. 3
      buildroot/tests/BIGTREE_GTR_V1_0

6
Marlin/Configuration.h
View File

@ -646,15 +646,15 @@
//#define MPC_FAN_0_ACTIVE_HOTEND
#endif
#define FILAMENT_HEAT_CAPACITY_PERMM 5.6e-3f // 0.0056 J/K/mm for 1.75mm PLA (0.0149 J/K/mm for 2.85mm PLA).
//#define FILAMENT_HEAT_CAPACITY_PERMM 3.6e-3f // 0.0036 J/K/mm for 1.75mm PETG (0.0094 J/K/mm for 2.85mm PETG).
#define FILAMENT_HEAT_CAPACITY_PERMM { 5.6e-3f } // 0.0056 J/K/mm for 1.75mm PLA (0.0149 J/K/mm for 2.85mm PLA).
//#define FILAMENT_HEAT_CAPACITY_PERMM { 3.6e-3f } // 0.0036 J/K/mm for 1.75mm PETG (0.0094 J/K/mm for 2.85mm PETG).
// Advanced options
#define MPC_SMOOTHING_FACTOR 0.5f // (0.0...1.0) Noisy temperature sensors may need a lower value for stabilization.
#define MPC_MIN_AMBIENT_CHANGE 1.0f // (K/s) Modeled ambient temperature rate of change, when correcting model inaccuracies.
#define MPC_STEADYSTATE 0.5f // (K/s) Temperature change rate for steady state logic to be enforced.
#define MPC_TUNING_POS { X_CENTER, Y_CENTER, 1.0f } // (mm) M306 Autotuning position, ideally bed center just above the surface.
#define MPC_TUNING_POS { X_CENTER, Y_CENTER, 1.0f } // (mm) M306 Autotuning position, ideally bed center at first layer height.
#define MPC_TUNING_END_Z 10.0f // (mm) M306 Autotuning final Z position.
#endif

8
Marlin/src/gcode/temp/M306.cpp
View File

@ -36,6 +36,7 @@
* C<joules/kelvin> Block heat capacity.
* E<extruder> Extruder number to set. (Default: E0)
* F<watts/kelvin> Ambient heat transfer coefficient (fan on full).
* H<joules/kelvin/mm> Filament heat capacity per mm.
* P<watts> Heater power.
* R<kelvin/second/kelvin> Sensor responsiveness (= transfer coefficient / heat capcity).
*/
@ -43,7 +44,7 @@
void GcodeSuite::M306() {
if (parser.seen_test('T')) { thermalManager.MPC_autotune(); return; }
if (parser.seen("ACFPR")) {
if (parser.seen("ACFPRH")) {
const heater_id_t hid = (heater_id_t)parser.intval('E', 0);
MPC_t &constants = thermalManager.temp_hotend[hid].constants;
if (parser.seenval('P')) constants.heater_power = parser.value_float();
@ -53,6 +54,7 @@ void GcodeSuite::M306() {
#if ENABLED(MPC_INCLUDE_FAN)
if (parser.seenval('F')) constants.fan255_adjustment = parser.value_float() - constants.ambient_xfer_coeff_fan0;
#endif
if (parser.seenval('H')) constants.filament_heat_capacity_permm = parser.value_float();
return;
}
@ -70,8 +72,10 @@ void GcodeSuite::M306_report(const bool forReplay/*=true*/) {
SERIAL_ECHOPAIR_F(" R", constants.sensor_responsiveness, 4);
SERIAL_ECHOPAIR_F(" A", constants.ambient_xfer_coeff_fan0, 4);
#if ENABLED(MPC_INCLUDE_FAN)
SERIAL_ECHOLNPAIR_F(" F", constants.ambient_xfer_coeff_fan0 + constants.fan255_adjustment, 4);
SERIAL_ECHOPAIR_F(" F", constants.ambient_xfer_coeff_fan0 + constants.fan255_adjustment, 4);
#endif
SERIAL_ECHOPAIR_F(" M", constants.filament_heat_capacity_permm, 4);
SERIAL_EOL();
}
}

3
Marlin/src/module/settings.cpp
View File

@ -3266,6 +3266,7 @@ void MarlinSettings::reset() {
#if ENABLED(MPC_INCLUDE_FAN)
constexpr float _mpc_ambient_xfer_coeff_fan255[] = MPC_AMBIENT_XFER_COEFF_FAN255;
#endif
constexpr float _filament_heat_capacity_permm[] = FILAMENT_HEAT_CAPACITY_PERMM;
static_assert(COUNT(_mpc_heater_power) == HOTENDS, "MPC_HEATER_POWER must have HOTENDS items.");
static_assert(COUNT(_mpc_block_heat_capacity) == HOTENDS, "MPC_BLOCK_HEAT_CAPACITY must have HOTENDS items.");
@ -3274,6 +3275,7 @@ void MarlinSettings::reset() {
#if ENABLED(MPC_INCLUDE_FAN)
static_assert(COUNT(_mpc_ambient_xfer_coeff_fan255) == HOTENDS, "MPC_AMBIENT_XFER_COEFF_FAN255 must have HOTENDS items.");
#endif
static_assert(COUNT(_filament_heat_capacity_permm) == HOTENDS, "FILAMENT_HEAT_CAPACITY_PERMM must have HOTENDS items.");
HOTEND_LOOP() {
thermalManager.temp_hotend[e].constants.heater_power = _mpc_heater_power[e];
@ -3283,6 +3285,7 @@ void MarlinSettings::reset() {
#if ENABLED(MPC_INCLUDE_FAN)
thermalManager.temp_hotend[e].constants.fan255_adjustment = _mpc_ambient_xfer_coeff_fan255[e] - _mpc_ambient_xfer_coeff[e];
#endif
thermalManager.temp_hotend[e].constants.filament_heat_capacity_permm = _filament_heat_capacity_permm[e];
}
#endif

6
Marlin/src/module/temperature.cpp
View File

@ -998,7 +998,7 @@ volatile bool Temperature::raw_temps_ready = false;
float asymp_temp = (t2 * t2 - t1 * t3) / (2 * t2 - t1 - t3),
block_responsiveness = -log((t2 - asymp_temp) / (t1 - asymp_temp)) / (sample_distance * (sample_count >> 1));
constants.ambient_xfer_coeff_fan0 = constants.heater_power * MPC_MAX / 255 / (asymp_temp - ambient_temp);
constants.ambient_xfer_coeff_fan0 = constants.heater_power * (MPC_MAX) / 255 / (asymp_temp - ambient_temp);
constants.fan255_adjustment = 0.0f;
constants.block_heat_capacity = constants.ambient_xfer_coeff_fan0 / block_responsiveness;
constants.sensor_responsiveness = block_responsiveness / (1.0f - (ambient_temp - asymp_temp) * exp(-block_responsiveness * t1_time) / (t1 - asymp_temp));
@ -1062,7 +1062,7 @@ volatile bool Temperature::raw_temps_ready = false;
#endif
// Calculate a new and better asymptotic temperature and re-evaluate the other constants
asymp_temp = ambient_temp + constants.heater_power / constants.ambient_xfer_coeff_fan0;
asymp_temp = ambient_temp + constants.heater_power * (MPC_MAX) / 255 / constants.ambient_xfer_coeff_fan0;
block_responsiveness = -log((t2 - asymp_temp) / (t1 - asymp_temp)) / (sample_distance * (sample_count >> 1));
constants.block_heat_capacity = constants.ambient_xfer_coeff_fan0 / block_responsiveness;
constants.sensor_responsiveness = block_responsiveness / (1.0f - (ambient_temp - asymp_temp) * exp(-block_responsiveness * t1_time) / (t1 - asymp_temp));
@ -1446,7 +1446,7 @@ void Temperature::min_temp_error(const heater_id_t heater_id) {
if (fabs(e_speed) > planner.settings.max_feedrate_mm_s[E_AXIS])
mpc_e_position = e_position;
else if (e_speed > 0.0f) { // Ignore retract/recover moves
ambient_xfer_coeff += e_speed * FILAMENT_HEAT_CAPACITY_PERMM;
ambient_xfer_coeff += e_speed * constants.filament_heat_capacity_permm;
mpc_e_position = e_position;
}
}

11
Marlin/src/module/temperature.h
View File

@ -96,13 +96,14 @@ hotend_pid_t;
#if ENABLED(MPCTEMP)
typedef struct {
float heater_power; // M306 P
float block_heat_capacity; // M306 C
float sensor_responsiveness; // M306 R
float ambient_xfer_coeff_fan0; // M306 A
float heater_power; // M306 P
float block_heat_capacity; // M306 C
float sensor_responsiveness; // M306 R
float ambient_xfer_coeff_fan0; // M306 A
#if ENABLED(MPC_INCLUDE_FAN)
float fan255_adjustment; // M306 F
float fan255_adjustment; // M306 F
#endif
float filament_heat_capacity_permm; // M306 M
} MPC_t;
#endif

3
buildroot/tests/BIGTREE_GTR_V1_0
View File

@ -37,7 +37,8 @@ opt_set MOTHERBOARD BOARD_BTT_GTR_V1_0 SERIAL_PORT -1 \
MPC_BLOCK_HEAT_CAPACITY '{ 16.7f, 16.7f, 16.7f }' \
MPC_SENSOR_RESPONSIVENESS '{ 0.22f, 0.22f, 0.22f }' \
MPC_AMBIENT_XFER_COEFF '{ 0.068f, 0.068f, 0.068f }' \
MPC_AMBIENT_XFER_COEFF_FAN255 '{ 0.097f, 0.097f, 0.097f }'
MPC_AMBIENT_XFER_COEFF_FAN255 '{ 0.097f, 0.097f, 0.097f }' \
FILAMENT_HEAT_CAPACITY_PERMM '{ 5.6e-3f, 3.6e-3f, 5.6e-3f }'
opt_enable SWITCHING_TOOLHEAD TOOL_SENSOR MPCTEMP MPC_EDIT_MENU MPC_AUTOTUNE_MENU
opt_disable PIDTEMP
exec_test $1 $2 "BigTreeTech GTR | MPC | Switching Toolhead | Tool Sensors" "$3"

Write Preview
Loading…
Cancel
Save