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@ -17,6 +17,20 @@
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/**
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* Thermal Protection parameters
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*/
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/**
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* Thermal Protection protects your printer from damage and fire if a
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* thermistor falls out or temperature sensors fail in any way.
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*
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* The issue: If a thermistor falls out or a temperature sensor fails,
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* Marlin can no longer sense the actual temperature. Since a disconnected
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* thermistor reads as a low temperature, the firmware will keep the heater on.
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*
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* The solution: Once the temperature reaches the target, start observing.
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* If the temperature stays too far below the target (hysteresis) for too long (period),
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* the firmware will halt the machine as a safety precaution.
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*
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* If you get false positives for "Thermal Runaway" increase THERMAL_PROTECTION_HYSTERESIS and/or THERMAL_PROTECTION_PERIOD
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*/
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#if ENABLED(THERMAL_PROTECTION_HOTENDS)
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#define THERMAL_PROTECTION_PERIOD 40 // Seconds
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#define THERMAL_PROTECTION_HYSTERESIS 4 // Degrees Celsius
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@ -26,11 +40,19 @@
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* WATCH_TEMP_PERIOD to expire, and if the temperature hasn't increased by WATCH_TEMP_INCREASE
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* degrees, the machine is halted, requiring a hard reset. This test restarts with any M104/M109,
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* but only if the current temperature is far enough below the target for a reliable test.
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*
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* If you get false positives for "Heating failed" increase WATCH_TEMP_PERIOD and/or decrease WATCH_TEMP_INCREASE
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* WATCH_TEMP_INCREASE should not be below 2.
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*/
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#define WATCH_TEMP_PERIOD 16 // Seconds
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#define WATCH_TEMP_INCREASE 4 // Degrees Celsius
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#endif
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/**
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* Thermal Protection parameters for the bed
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* are like the above for the hotends.
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* WATCH_TEMP_BED_PERIOD and WATCH_TEMP_BED_INCREASE are not imlemented now.
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*/
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#if ENABLED(THERMAL_PROTECTION_BED)
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#define THERMAL_PROTECTION_BED_PERIOD 120 // Seconds
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#define THERMAL_PROTECTION_BED_HYSTERESIS 4 // Degrees Celsius
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