✨ Add TEMP_SENSOR_BOARD (MarlinFirmware#22279, MarlinFirmware#22342, MarlinFirmware#22343, MarlinFirmware#22344, MarlinFirmware#22350)

Author: thinkyhead

Marlin/Configuration.h

@@ -452,6 +452,7 @@
  *    67 : 500kΩ  SliceEngineering 450°C Thermistor
  *    70 : 100kΩ  bq Hephestos 2
  *    75 : 100kΩ  Generic Silicon Heat Pad with NTC100K MGB18-104F39050L32
+ *  2000 : 100kΩ  Ultimachine Rambo TDK NTCG104LH104KT1 NTC100K motherboard Thermistor
  *
  *  Analog Thermistors - 1kΩ pullup - Atypical, and requires changing out the 4.7kΩ pullup for 1kΩ.
  *  -------                           (but gives greater accuracy and more stable PID)
@@ -475,7 +476,7 @@
  *                NOTE: ADC pins are not 5V tolerant. Not recommended because it's possible to damage the CPU by going over 500°C.
  *   201 : Pt100  with circuit in Overlord, similar to Ultimainboard V2.x
  *
- *  Custom/Dummy/Other Thermos
+ *  Custom/Dummy/Other Thermal Sensors
  *  ------
  *     0 : not used
  *  1000 : Custom - Specify parameters in Configuration_adv.h
@@ -497,6 +498,7 @@
 #define TEMP_SENSOR_PROBE 0
 #define TEMP_SENSOR_CHAMBER 0
 #define TEMP_SENSOR_COOLER 0
+#define TEMP_SENSOR_BOARD 0
 #define TEMP_SENSOR_REDUNDANT 0
 
 // Dummy thermistor constant temperature readings, for use with 998 and 999
@@ -529,17 +531,11 @@
  * the print will be aborted. Whichever sensor is selected will have its normal functions disabled; i.e. selecting
  * the Bed sensor (-1) will disable bed heating/monitoring.
  *
- * Use the following to select temp sensors:
- *    -5 : Cooler
- *    -4 : Probe
- *    -3 : not used
- *    -2 : Chamber
- *    -1 : Bed
- *   0-7 : E0 through E7
+ * For selecting source/target use: COOLER, PROBE, BOARD, CHAMBER, BED, E0, E1, E2, E3, E4, E5, E6, E7
  */
 #if TEMP_SENSOR_REDUNDANT
-  #define TEMP_SENSOR_REDUNDANT_SOURCE     1  // The sensor that will provide the redundant reading.
-  #define TEMP_SENSOR_REDUNDANT_TARGET     0  // The sensor that we are providing a redundant reading for.
+  #define TEMP_SENSOR_REDUNDANT_SOURCE    E1  // The sensor that will provide the redundant reading.
+  #define TEMP_SENSOR_REDUNDANT_TARGET    E0  // The sensor that we are providing a redundant reading for.
   #define TEMP_SENSOR_REDUNDANT_MAX_DIFF  10  // (°C) Temperature difference that will trigger a print abort.
 #endif
 

Marlin/Configuration_adv.h

@@ -125,6 +125,12 @@
   #define PROBE_BETA                   3950    // Beta value
 #endif
 
+#if TEMP_SENSOR_BOARD == 1000
+  #define BOARD_PULLUP_RESISTOR_OHMS   4700    // Pullup resistor
+  #define BOARD_RESISTANCE_25C_OHMS    100000  // Resistance at 25C
+  #define BOARD_BETA                   3950    // Beta value
+#endif
+
 #if TEMP_SENSOR_REDUNDANT == 1000
   #define REDUNDANT_PULLUP_RESISTOR_OHMS   4700    // Pullup resistor
   #define REDUNDANT_RESISTANCE_25C_OHMS    100000  // Resistance at 25C
@@ -224,6 +230,18 @@
   #endif
 #endif
 
+//
+// Motherboard Sensor options
+//
+#if TEMP_SENSOR_BOARD
+  #define THERMAL_PROTECTION_BOARD   // Halt the printer if the board sensor leaves the temp range below.
+  #define BOARD_MINTEMP           8  // (°C)
+  #define BOARD_MAXTEMP          70  // (°C)
+  #ifndef TEMP_BOARD_PIN
+    //#define TEMP_BOARD_PIN -1      // Board temp sensor pin, if not set in pins file.
+  #endif
+#endif
+
 //
 // Laser Coolant Flow Meter
 //
@@ -480,16 +498,20 @@
  */
 //#define USE_CONTROLLER_FAN
 #if ENABLED(USE_CONTROLLER_FAN)
-  //#define CONTROLLER_FAN_PIN -1        // Set a custom pin for the controller fan
-  //#define CONTROLLER_FAN_USE_Z_ONLY    // With this option only the Z axis is considered
-  //#define CONTROLLER_FAN_IGNORE_Z      // Ignore Z stepper. Useful when stepper timeout is disabled.
-  #define CONTROLLERFAN_SPEED_MIN      0 // (0-255) Minimum speed. (If set below this value the fan is turned off.)
-  #define CONTROLLERFAN_SPEED_ACTIVE 255 // (0-255) Active speed, used when any motor is enabled
-  #define CONTROLLERFAN_SPEED_IDLE     0 // (0-255) Idle speed, used when motors are disabled
-  #define CONTROLLERFAN_IDLE_TIME     60 // (seconds) Extra time to keep the fan running after disabling motors
-  //#define CONTROLLER_FAN_EDITABLE      // Enable M710 configurable settings
+  //#define CONTROLLER_FAN_PIN -1           // Set a custom pin for the controller fan
+  //#define CONTROLLER_FAN_USE_Z_ONLY       // With this option only the Z axis is considered
+  //#define CONTROLLER_FAN_IGNORE_Z         // Ignore Z stepper. Useful when stepper timeout is disabled.
+  #define CONTROLLERFAN_SPEED_MIN         0 // (0-255) Minimum speed. (If set below this value the fan is turned off.)
+  #define CONTROLLERFAN_SPEED_ACTIVE    255 // (0-255) Active speed, used when any motor is enabled
+  #define CONTROLLERFAN_SPEED_IDLE        0 // (0-255) Idle speed, used when motors are disabled
+  #define CONTROLLERFAN_IDLE_TIME        60 // (seconds) Extra time to keep the fan running after disabling motors
+
+  // Use TEMP_SENSOR_BOARD as a trigger for enabling the controller fan
+  //#define CONTROLLER_FAN_MIN_BOARD_TEMP 40  // (°C) Turn on the fan if the board reaches this temperature
+
+  //#define CONTROLLER_FAN_EDITABLE         // Enable M710 configurable settings
   #if ENABLED(CONTROLLER_FAN_EDITABLE)
-    #define CONTROLLER_FAN_MENU          // Enable the Controller Fan submenu
+    #define CONTROLLER_FAN_MENU             // Enable the Controller Fan submenu
   #endif
 #endif
 

Marlin/src/MarlinCore.cpp

@@ -1218,10 +1218,10 @@ void setup() {
   SETUP_RUN(HAL_init());
 
   // Init and disable SPI thermocouples; this is still needed
-  #if TEMP_SENSOR_0_IS_MAX_TC || (TEMP_SENSOR_REDUNDANT_IS_MAX_TC && TEMP_SENSOR_REDUNDANT_SOURCE == 0)
+  #if TEMP_SENSOR_0_IS_MAX_TC || (TEMP_SENSOR_REDUNDANT_IS_MAX_TC && REDUNDANT_TEMP_MATCH(SOURCE, E0))
     OUT_WRITE(TEMP_0_CS_PIN, HIGH);  // Disable
   #endif
-  #if TEMP_SENSOR_1_IS_MAX_TC || (TEMP_SENSOR_REDUNDANT_IS_MAX_TC && TEMP_SENSOR_REDUNDANT_SOURCE == 1)
+  #if TEMP_SENSOR_1_IS_MAX_TC || (TEMP_SENSOR_REDUNDANT_IS_MAX_TC && REDUNDANT_TEMP_MATCH(SOURCE, E1))
     OUT_WRITE(TEMP_1_CS_PIN, HIGH);
   #endif
 

Marlin/src/core/language.h

@@ -231,6 +231,9 @@
 #define STR_HEATER_BED                      "bed"
 #define STR_HEATER_CHAMBER                  "chamber"
 #define STR_COOLER                          "cooler"
+#define STR_MOTHERBOARD                     "motherboard"
+#define STR_PROBE                           "probe"
+#define STR_REDUNDANT                       "redundant "
 #define STR_LASER_TEMP                      "laser temperature"
 
 #define STR_STOPPED_HEATER                  ", system stopped! Heater_ID: "

Marlin/src/feature/controllerfan.cpp

@@ -76,9 +76,14 @@ void ControllerFan::update() {
       )
     );
 
-    // If any of the drivers or the heated bed are enabled...
-    if (motor_on || TERN0(HAS_HEATED_BED, thermalManager.temp_bed.soft_pwm_amount > 0))
-      lastMotorOn = ms; //... set time to NOW so the fan will turn on
+    // If any triggers for the controller fan are true...
+    //   - At least one stepper driver is enabled
+    //   - The heated bed is enabled
+    //   - TEMP_SENSOR_BOARD is reporting >= CONTROLLER_FAN_MIN_BOARD_TEMP
+    if ( motor_on
+      || TERN0(HAS_HEATED_BED, thermalManager.temp_bed.soft_pwm_amount > 0)
+      || TERN0(HAS_CONTROLLER_FAN_MIN_BOARD_TEMP, thermalManager.wholeDegBoard() >= CONTROLLER_FAN_MIN_BOARD_TEMP)
+    ) lastMotorOn = ms; //... set time to NOW so the fan will turn on
 
     // Fan Settings. Set fan > 0:
     //  - If AutoMode is on and steppers have been enabled for CONTROLLERFAN_IDLE_TIME seconds.