Thermal runaway protection
Dočetl jsem se, že Marlin obsahuje funkci, která odstaví vyhřívání v případě, že dojde k chybě termistoru, ale defaultně je prý vypnutá, viz:
/*================== Thermal Runaway Protection ==============================
This is a feature to protect your printer from burn up in flames if it has a thermistor coming off place (this happened to a friend of mine recently and motivated me writing this feature).
The issue: If a thermistor come off, it will read a lower temperature than actual. The system will turn the heater on forever, burning up the filament and anything else around.
After the temperature reaches the target for the first time, this feature will start measuring for how long the current temperature stays below the target minus _HYSTERESIS (set_temperature - THERMAL_RUNAWAY_PROTECTION_HYSTERESIS).
If it stays longer than _PERIOD, it means the thermistor temperature cannot catch up with the target, so something may be wrong. Then, to be on the safe side, the system will he halt.
Bear in mind the count down will just start AFTER the first time the thermistor temperature is over the target, so you will have no problem if your extruder heater takes 2 minutes to hit the target on heating.
*/
// If you want to enable this feature for all your extruder heaters, // uncomment the 2 defines below:
// Parameters for all extruder heaters
define THERMAL_RUNAWAY_PROTECTION_PERIOD 40 //in seconds
define THERMAL_RUNAWAY_PROTECTION_HYSTERESIS 4 // in degree Celsius
// If you want to enable this feature for your bed heater, // uncomment the 2 defines below:
// Parameters for the bed heater
define THERMAL_RUNAWAY_PROTECTION_BED_PERIOD 60 //in seconds
define THERMAL_RUNAWAY_PROTECTION_BED_HYSTERESIS 10 // in degree Celsius
Je funkce ve firmware našich tiskáren zapnutá?
Re: Thermal runaway protection
Tahle konkrétně je vypnutá.
Re: Thermal runaway protection
Dobry den, aktuálně je funkce v Marlinu rozbitá. Nicméně už máme fix a budeme v příštím releasu přidávat na všechny tiskárny.