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Merge pull request #1813 from thinkyhead/fixup_probing

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Fix bad thermal runaway trigger
This commit is contained in:
Scott Lahteine 2015-04-04 14:41:43 -07:00
commit 6c5f07c5cb
1 changed files with 29 additions and 34 deletions
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63
Marlin/temperature.cpp
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@ -76,15 +76,14 @@ unsigned char soft_pwm_bed;
#define HAS_HEATER_THERMAL_PROTECTION (defined(THERMAL_RUNAWAY_PROTECTION_PERIOD) && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0) #define HAS_HEATER_THERMAL_PROTECTION (defined(THERMAL_RUNAWAY_PROTECTION_PERIOD) && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0)
#define HAS_BED_THERMAL_PROTECTION (defined(THERMAL_RUNAWAY_PROTECTION_BED_PERIOD) && THERMAL_RUNAWAY_PROTECTION_BED_PERIOD > 0 && TEMP_SENSOR_BED != 0) #define HAS_BED_THERMAL_PROTECTION (defined(THERMAL_RUNAWAY_PROTECTION_BED_PERIOD) && THERMAL_RUNAWAY_PROTECTION_BED_PERIOD > 0 && TEMP_SENSOR_BED != 0)
#if HAS_HEATER_THERMAL_PROTECTION || HAS_BED_THERMAL_PROTECTION #if HAS_HEATER_THERMAL_PROTECTION || HAS_BED_THERMAL_PROTECTION
enum TRState { TRInactive, TRFirstHeating, TRStable }; enum TRState { TRReset, TRInactive, TRFirstHeating, TRStable, TRRunaway };
static bool thermal_runaway = false;
void thermal_runaway_protection(TRState *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc); void thermal_runaway_protection(TRState *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc);
#if HAS_HEATER_THERMAL_PROTECTION #if HAS_HEATER_THERMAL_PROTECTION
static TRState thermal_runaway_state_machine[4] = { TRInactive, TRInactive, TRInactive, TRInactive }; static TRState thermal_runaway_state_machine[4] = { TRReset, TRReset, TRReset, TRReset };
static unsigned long thermal_runaway_timer[4]; // = {0,0,0,0}; static unsigned long thermal_runaway_timer[4]; // = {0,0,0,0};
#endif #endif
#if HAS_BED_THERMAL_PROTECTION #if HAS_BED_THERMAL_PROTECTION
static TRState thermal_runaway_bed_state_machine = TRInactive; static TRState thermal_runaway_bed_state_machine = TRReset;
static unsigned long thermal_runaway_bed_timer; static unsigned long thermal_runaway_bed_timer;
#endif #endif
#endif #endif
@ -1007,7 +1006,7 @@ void setWatch() {
void thermal_runaway_protection(TRState *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc) { void thermal_runaway_protection(TRState *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc) {
static int tr_target_temperature[EXTRUDERS+1]; static float tr_target_temperature[EXTRUDERS+1] = { 0.0 };
/* /*
SERIAL_ECHO_START; SERIAL_ECHO_START;
@ -1023,20 +1022,23 @@ void setWatch() {
SERIAL_ECHOPGM(target_temperature); SERIAL_ECHOPGM(target_temperature);
SERIAL_EOL; SERIAL_EOL;
*/ */
if (target_temperature == 0 || thermal_runaway) {
*state = TRInactive;
*timer = 0;
return;
}
int heater_index = heater_id >= 0 ? heater_id : EXTRUDERS; int heater_index = heater_id >= 0 ? heater_id : EXTRUDERS;
// If the target temperature changes, restart
if (tr_target_temperature[heater_index] != target_temperature)
*state = TRReset;
switch (*state) { switch (*state) {
case TRReset:
*timer = 0;
*state = TRInactive;
break;
// Inactive state waits for a target temperature to be set // Inactive state waits for a target temperature to be set
case TRInactive: case TRInactive:
if (target_temperature > 0) { if (target_temperature > 0) {
*state = TRFirstHeating;
tr_target_temperature[heater_index] = target_temperature; tr_target_temperature[heater_index] = target_temperature;
*state = TRFirstHeating;
} }
break; break;
// When first heating, wait for the temperature to be reached then go to Stable state // When first heating, wait for the temperature to be reached then go to Stable state
@ -1045,31 +1047,24 @@ void setWatch() {
break; break;
// While the temperature is stable watch for a bad temperature // While the temperature is stable watch for a bad temperature
case TRStable: case TRStable:
{
// If the target temperature changes, restart
if (tr_target_temperature[heater_index] != target_temperature) {
*state = TRInactive;
break;
}
// If the temperature is over the target (-hysteresis) restart the timer // If the temperature is over the target (-hysteresis) restart the timer
if (temperature >= tr_target_temperature[heater_index] - hysteresis_degc) *timer = millis(); if (temperature >= tr_target_temperature[heater_index] - hysteresis_degc)
*timer = millis();
// If the timer goes too long without a reset, trigger shutdown // If the timer goes too long without a reset, trigger shutdown
else if (millis() > *timer + period_seconds * 1000UL) { else if (millis() > *timer + period_seconds * 1000UL)
SERIAL_ERROR_START; *state = TRRunaway;
SERIAL_ERRORLNPGM(MSG_THERMAL_RUNAWAY_STOP); break;
if (heater_id < 0) SERIAL_ERRORLNPGM("bed"); else SERIAL_ERRORLN(heater_id); case TRRunaway:
LCD_ALERTMESSAGEPGM(MSG_THERMAL_RUNAWAY); SERIAL_ERROR_START;
thermal_runaway = true; SERIAL_ERRORLNPGM(MSG_THERMAL_RUNAWAY_STOP);
for (;;) { if (heater_id < 0) SERIAL_ERRORLNPGM("bed"); else SERIAL_ERRORLN(heater_id);
disable_heater(); LCD_ALERTMESSAGEPGM(MSG_THERMAL_RUNAWAY);
disable_all_steppers(); disable_heater();
manage_heater(); disable_all_steppers();
lcd_update(); for (;;) {
} manage_heater();
lcd_update();
} }
} break;
} }
} }