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-rw-r--r--Sprinter/heater.cpp29
1 files changed, 29 insertions, 0 deletions
diff --git a/Sprinter/heater.cpp b/Sprinter/heater.cpp
index ebab2a5..69e9e86 100644
--- a/Sprinter/heater.cpp
+++ b/Sprinter/heater.cpp
@@ -32,6 +32,10 @@
void controllerFan(void);
#endif
+#ifdef EXTRUDERFAN_PIN
+ void extruderFan(void);
+#endif
+
// Manage heater variables. For a thermistor or AD595 thermocouple, raw values refer to the
// reading from the analog pin. For a MAX6675 thermocouple, the raw value is the temperature in 0.25
// degree increments (i.e. 100=25 deg).
@@ -734,6 +738,10 @@ void PID_autotune(int PIDAT_test_temp)
controllerFan(); //Check if fan should be turned on to cool stepper drivers down
#endif
+#ifdef EXTRUDERFAN_PIN
+ extruderFan(); //Check if fan should be turned on to cool extruder down
+#endif
+
}
#if defined (HEATER_USES_THERMISTOR) || defined (BED_USES_THERMISTOR)
@@ -844,3 +852,24 @@ void controllerFan()
}
#endif
+#ifdef EXTRUDERFAN_PIN
+unsigned long lastExtruderCheck = 0;
+
+void extruderFan()
+{
+ if ((millis() - lastExtruderCheck) >= 2500) //Not a time critical function, so we only check every 2500ms
+ {
+ lastExtruderCheck = millis();
+
+ if (analog2temp(current_raw) < EXTRUDERFAN_DEC)
+ {
+ WRITE(EXTRUDERFAN_PIN, LOW); //... turn the fan off
+ }
+ else
+ {
+ WRITE(EXTRUDERFAN_PIN, HIGH); //... turn the fan on
+ }
+ }
+}
+#endif
+