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config/examples/BIBO/TouchX/default/Configuration.h

@@ -724,6 +724,7 @@
  * impact FET heating. This also works fine on a Fotek SSR-10DA Solid State Relay into a 250W
  * heater. If your configuration is significantly different than this and you don't understand
  * the issues involved, don't use bed PID until someone else verifies that your hardware works.
+ * @section bed temp
  */
 //#define PIDTEMPBED
 
@@ -750,7 +751,52 @@
   // FIND YOUR OWN: "M303 E-1 C8 S90" to run autotune on the bed at 90 degreesC for 8 cycles.
 #endif // PIDTEMPBED
 
-#if EITHER(PIDTEMP, PIDTEMPBED)
+//===========================================================================
+//==================== PID > Chamber Temperature Control ====================
+//===========================================================================
+
+/**
+ * PID Chamber Heating
+ *
+ * If this option is enabled set PID constants below.
+ * If this option is disabled, bang-bang will be used and CHAMBER_LIMIT_SWITCHING will enable
+ * hysteresis.
+ *
+ * The PID frequency will be the same as the extruder PWM.
+ * If PID_dT is the default, and correct for the hardware/configuration, that means 7.689Hz,
+ * which is fine for driving a square wave into a resistive load and does not significantly
+ * impact FET heating. This also works fine on a Fotek SSR-10DA Solid State Relay into a 200W
+ * heater. If your configuration is significantly different than this and you don't understand
+ * the issues involved, don't use chamber PID until someone else verifies that your hardware works.
+ * @section chamber temp
+ */
+//#define PIDTEMPCHAMBER
+//#define CHAMBER_LIMIT_SWITCHING
+
+/**
+ * Max Chamber Power
+ * Applies to all forms of chamber control (PID, bang-bang, and bang-bang with hysteresis).
+ * When set to any value below 255, enables a form of PWM to the chamber heater that acts like a divider
+ * so don't use it unless you are OK with PWM on your heater. (See the comment on enabling PIDTEMPCHAMBER)
+ */
+#define MAX_CHAMBER_POWER 255 // limits duty cycle to chamber heater; 255=full current
+
+#if ENABLED(PIDTEMPCHAMBER)
+  #define MIN_CHAMBER_POWER 0
+  //#define PID_CHAMBER_DEBUG // Print Chamber PID debug data to the serial port.
+
+  // Lasko "MyHeat Personal Heater" (200w) modified with a Fotek SSR-10DA to control only the heating element
+  // and placed inside the small Creality printer enclosure tent.
+  //
+  #define DEFAULT_chamberKp 37.04
+  #define DEFAULT_chamberKi 1.40
+  #define DEFAULT_chamberKd 655.17
+  // M309 P37.04 I1.04 D655.17
+
+  // FIND YOUR OWN: "M303 E-2 C8 S50" to run autotune on the chamber at 50 degreesC for 8 cycles.
+#endif // PIDTEMPCHAMBER
+
+#if ANY(PIDTEMP, PIDTEMPBED, PIDTEMPCHAMBER)
   //#define PID_OPENLOOP          // Puts PID in open loop. M104/M140 sets the output power from 0 to PID_MAX
   //#define SLOW_PWM_HEATERS      // PWM with very low frequency (roughly 0.125Hz=8s) and minimum state time of approximately 1s useful for heaters driven by a relay
   #define PID_FUNCTIONAL_RANGE 10 // If the temperature difference between the target temperature and the actual temperature

config/examples/BIBO/TouchX/default/Configuration_adv.h

@@ -210,6 +210,13 @@
 //
 // Heated Chamber options
 //
+#if DISABLED(PIDTEMPCHAMBER)
+  #define CHAMBER_CHECK_INTERVAL 5000   // (ms) Interval between checks in bang-bang control
+  #if ENABLED(CHAMBER_LIMIT_SWITCHING)
+    #define CHAMBER_HYSTERESIS 2        // (°C) Only set the relevant heater state when ABS(T-target) > CHAMBER_HYSTERESIS
+  #endif
+#endif
+
 #if TEMP_SENSOR_CHAMBER
   //#define HEATER_CHAMBER_PIN      P2_04   // Required heater on/off pin (example: SKR 1.4 Turbo HE1 plug)
   //#define HEATER_CHAMBER_INVERTING false
@@ -3536,7 +3543,6 @@
      */
     //#define LASER_POWER_TRAP
 
-
     //
     // Laser I2C Ammeter (High precision INA226 low/high side module)
     //