From 344235701b086f514ef9fa4fb928cb60bb2e4a78 Mon Sep 17 00:00:00 2001
From: blddk <michael.andresen@gmail.com>
Date: Thu, 24 May 2012 21:07:35 +0300
Subject: Too many if('s

---
 Sprinter/Sprinter.pde | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Sprinter/Sprinter.pde b/Sprinter/Sprinter.pde
index 8801973..e76f1c4 100644
--- a/Sprinter/Sprinter.pde
+++ b/Sprinter/Sprinter.pde
@@ -2502,12 +2502,12 @@ void plan_buffer_line(float x, float y, float z, float e, float feed_rate)
     enable_y();
     delayMicroseconds(DELAY_ENABLE);
   }
-  if(if(block->steps_z != 0))
+  if(block->steps_z != 0)
   {
     enable_z();
     delayMicroseconds(DELAY_ENABLE);
   }
-  if(if(block->steps_e != 0))
+  if(block->steps_e != 0)
   {
     enable_e();
     delayMicroseconds(DELAY_ENABLE);
-- 
cgit v1.2.1


From b76a110336fd66b9da8da6aac704e408c676740d Mon Sep 17 00:00:00 2001
From: blddk <michael.andresen@gmail.com>
Date: Thu, 24 May 2012 21:13:49 +0300
Subject: Added function to turn a fan on and off to keep heat from the hotend
 to rise up into the extruder.

---
 Sprinter/heater.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

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
+
-- 
cgit v1.2.1


From 9c708af22ec71ca97bbfe18cbb6d1c868faea9a9 Mon Sep 17 00:00:00 2001
From: blddk <michael.andresen@gmail.com>
Date: Thu, 24 May 2012 21:15:00 +0300
Subject: Added variables for extruder fan

---
 Sprinter/Configuration.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sprinter/Configuration.h b/Sprinter/Configuration.h
index ccf2762..5d5d78e 100644
--- a/Sprinter/Configuration.h
+++ b/Sprinter/Configuration.h
@@ -362,6 +362,9 @@ const int dropsegments=5; //everything with less than this number of steps will
 //#define CONTROLLERFAN_PIN 23 //Pin used for the fan to cool controller, comment out to disable this function
 #define CONTROLLERFAN_SEC 60 //How many seconds, after all motors were disabled, the fan should run
 
+//This is for controlling a fan that will keep the extruder cool.
+//#define EXTRUDERFAN_PIN 66 //Pin used to control the fan, comment out to disable this function
+#define EXTRUDERFAN_DEC 50 //Hotend temperature from where the fan will be turned on
 
 //-----------------------------------------------------------------------
 // DEBUGING
-- 
cgit v1.2.1