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M303 thermal runaway protection

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This commit is contained in:
Scott Lahteine 2017-11-03 03:24:19 -05:00
parent 6827e243a0
commit 2f9e42feb9
2 changed files with 61 additions and 19 deletions
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66
Marlin/src/module/temperature.cpp
View file

@ -217,7 +217,7 @@ uint8_t Temperature::soft_pwm_amount[HOTENDS],
#if HAS_PID_HEATING #if HAS_PID_HEATING
void Temperature::PID_autotune(float temp, int hotend, int ncycles, bool set_result/*=false*/) { void Temperature::PID_autotune(const float temp, const int8_t hotend, const int8_t ncycles, const bool set_result/*=false*/) {
float input = 0.0; float input = 0.0;
int cycles = 0; int cycles = 0;
bool heating = true; bool heating = true;
@ -226,27 +226,59 @@ uint8_t Temperature::soft_pwm_amount[HOTENDS],
long t_high = 0, t_low = 0; long t_high = 0, t_low = 0;
long bias, d; long bias, d;
float Ku, Tu; float Ku, Tu,
float workKp = 0, workKi = 0, workKd = 0; workKp = 0, workKi = 0, workKd = 0,
float max = 0, min = 10000; max = 0, min = 10000;
#if WATCH_THE_BED || WATCH_HOTENDS
const float watch_temp_target = temp -
#if ENABLED(THERMAL_PROTECTION_BED) && ENABLED(PIDTEMPBED) && ENABLED(THERMAL_PROTECTION_HOTENDS) && ENABLED(PIDTEMP)
(hotend < 0 ? (WATCH_BED_TEMP_INCREASE + TEMP_BED_HYSTERESIS + 1) : (WATCH_TEMP_INCREASE + TEMP_HYSTERESIS + 1))
#elif ENABLED(THERMAL_PROTECTION_BED) && ENABLED(PIDTEMPBED)
(WATCH_BED_TEMP_INCREASE + TEMP_BED_HYSTERESIS + 1)
#else
(WATCH_TEMP_INCREASE + TEMP_HYSTERESIS + 1)
#endif
;
const int8_t watch_temp_period =
#if ENABLED(THERMAL_PROTECTION_BED) && ENABLED(PIDTEMPBED) && ENABLED(THERMAL_PROTECTION_HOTENDS) && ENABLED(PIDTEMP)
hotend < 0 ? temp - THERMAL_PROTECTION_BED_PERIOD : THERMAL_PROTECTION_PERIOD
#elif ENABLED(THERMAL_PROTECTION_BED) && ENABLED(PIDTEMPBED)
THERMAL_PROTECTION_BED_PERIOD
#else
THERMAL_PROTECTION_PERIOD
#endif
;
const int8_t hysteresis =
#if ENABLED(THERMAL_PROTECTION_BED) && ENABLED(PIDTEMPBED) && ENABLED(THERMAL_PROTECTION_HOTENDS) && ENABLED(PIDTEMP)
hotend < 0 ? TEMP_BED_HYSTERESIS : TEMP_HYSTERESIS
#elif ENABLED(THERMAL_PROTECTION_BED) && ENABLED(PIDTEMPBED)
TEMP_BED_HYSTERESIS
#else
TEMP_HYSTERESIS
#endif
;
millis_t temp_change_ms = next_temp_ms + watch_temp_period * 1000UL;
float next_watch_temp = 0.0;
bool heated = false;
#endif
#if HAS_AUTO_FAN #if HAS_AUTO_FAN
next_auto_fan_check_ms = next_temp_ms + 2500UL; next_auto_fan_check_ms = next_temp_ms + 2500UL;
#endif #endif
if (hotend >=
#if ENABLED(PIDTEMP) #if ENABLED(PIDTEMP)
HOTENDS #define _TOP_HOTEND HOTENDS - 1
#else #else
0 #define _TOP_HOTEND -1
#endif #endif
|| hotend <
#if ENABLED(PIDTEMPBED) #if ENABLED(PIDTEMPBED)
-1 #define _BOT_HOTEND -1
#else #else
0 #define _BOT_HOTEND 0
#endif #endif
) {
if (!WITHIN(hotend, _BOT_HOTEND, _TOP_HOTEND)) {
SERIAL_ECHOLN(MSG_PID_BAD_EXTRUDER_NUM); SERIAL_ECHOLN(MSG_PID_BAD_EXTRUDER_NUM);
return; return;
} }
@ -332,7 +364,7 @@ uint8_t Temperature::soft_pwm_amount[HOTENDS],
; ;
bias += (d * (t_high - t_low)) / (t_low + t_high); bias += (d * (t_high - t_low)) / (t_low + t_high);
bias = constrain(bias, 20, max_pow - 20); bias = constrain(bias, 20, max_pow - 20);
d = (bias > max_pow / 2) ? max_pow - 1 - bias : bias; d = (bias > max_pow >> 1) ? max_pow - 1 - bias : bias;
SERIAL_PROTOCOLPAIR(MSG_BIAS, bias); SERIAL_PROTOCOLPAIR(MSG_BIAS, bias);
SERIAL_PROTOCOLPAIR(MSG_D, d); SERIAL_PROTOCOLPAIR(MSG_D, d);
@ -396,6 +428,16 @@ uint8_t Temperature::soft_pwm_amount[HOTENDS],
#endif #endif
next_temp_ms = ms + 2000UL; next_temp_ms = ms + 2000UL;
#if WATCH_THE_BED || WATCH_HOTENDS
if (!heated && input > next_watch_temp) {
if (input > watch_temp_target) heated = true;
next_watch_temp = input + hysteresis;
temp_change_ms = ms + watch_temp_period * 1000UL;
}
else if ((!heated && ELAPSED(ms, temp_change_ms)) || (heated && input < temp - MAX_OVERSHOOT_PID_AUTOTUNE))
_temp_error(hotend, PSTR(MSG_T_THERMAL_RUNAWAY), PSTR(MSG_THERMAL_RUNAWAY));
#endif
} // every 2 seconds } // every 2 seconds
// Timeout after 20 minutes since the last undershoot/overshoot cycle // Timeout after 20 minutes since the last undershoot/overshoot cycle
if (((ms - t1) + (ms - t2)) > (20L * 60L * 1000L)) { if (((ms - t1) + (ms - t2)) > (20L * 60L * 1000L)) {

2
Marlin/src/module/temperature.h
View file

@ -429,7 +429,7 @@ class Temperature {
* Perform auto-tuning for hotend or bed in response to M303 * Perform auto-tuning for hotend or bed in response to M303
*/ */
#if HAS_PID_HEATING #if HAS_PID_HEATING
static void PID_autotune(float temp, int hotend, int ncycles, bool set_result=false); static void PID_autotune(const float temp, const int8_t hotend, const int8_t ncycles, const bool set_result=false);
#endif #endif
/** /**