✨ MPC_PTC

MarlinFirmware/Marlin#27911

config/default/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/default/Configuration_adv.h

@@ -2323,12 +2323,8 @@
   //#define BABYSTEP_DISPLAY_TOTAL          // Display total babysteps since last G28
 
   //#define BABYSTEP_ZPROBE_OFFSET          // Combine M851 Z and Babystepping
-  //#define BABYSTEP_GLOBAL_Z               // Combine M424 Z and Babystepping
-
-  #if ANY(BABYSTEP_ZPROBE_OFFSET, BABYSTEP_GLOBAL_Z)
   #if ENABLED(BABYSTEP_ZPROBE_OFFSET)
     //#define BABYSTEP_HOTEND_Z_OFFSET      // For multiple hotends, babystep relative Z offsets
-    #endif
     //#define BABYSTEP_GFX_OVERLAY          // Enable graphical overlay on Z-offset editor
   #endif
 #endif
@@ -3920,14 +3916,6 @@
  */
 //#define CNC_COORDINATE_SYSTEMS
 
-/**
- * CNC Drilling Cycle - UNDER DEVELOPMENT
- *
- * Enables G81 to perform a drilling cycle.
- * Currently only supports a single cycle, no G-code chaining.
- */
-//#define CNC_DRILLING_CYCLE
-
 // @section security
 
 /**
@@ -4024,15 +4012,6 @@
   //#define GCODE_QUOTED_STRINGS  // Support for quoted string parameters
 #endif
 
-/**
- * Variables
- *
- * Define a variable from 100-115 with G-code like '#101=19.6'.
- * A variable can then be used in a G-code expression like 'G0 X[#101+3]'.
- * See https://gcodetutor.com/cnc-macro-programming/cnc-variables.html
- */
-//#define GCODE_VARIABLES
-
 /**
  * Support for MeatPack G-code compression (https://github.com/scottmudge/OctoPrint-MeatPack)
  */

config/examples/3DFabXYZ/Migbot/Configuration.h

@@ -742,7 +742,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/3DMatik/XL/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/ADIMLab/Gantry v1/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/ADIMLab/Gantry v2/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Alfawise/U20-bltouch/Configuration.h

@@ -799,7 +799,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Alfawise/U20/Configuration.h

@@ -799,7 +799,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AliExpress/CL-260/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AliExpress/UM2pExt/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/A2/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/A2plus/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/A6/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/A8/Configuration.h

@@ -743,7 +743,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/A8plus/Configuration.h

@@ -743,7 +743,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/A9/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/E10/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/E16/BTT SKR 1.3/Configuration.h

@@ -742,7 +742,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/E16/Stock/Configuration.h

@@ -742,7 +742,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/ET4+/Configuration.h

@@ -746,7 +746,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/ET4-Pro/Configuration.h

@@ -746,7 +746,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/ET4/Configuration.h

@@ -746,7 +746,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/ET4X/Configuration.h

@@ -746,7 +746,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/ET5-Pro/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/ET5/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Anet/ET5X/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/Chiron/Configuration.h

@@ -745,7 +745,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/Mega Zero 2.0/Anycubic V1/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/Mega Zero/Anycubic V1/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/Mega Zero/BigTreeTech SKR Mini MZ V1.0/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/Vyper/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/i3 Mega/Trigorilla AVR/Configuration.h

@@ -780,7 +780,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/i3 Mega/Trigorilla Pro STM32/Configuration.h

@@ -748,7 +748,12 @@
   #define MPC_AUTOTUNE_MENU                           // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/AnyCubic/i3/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/ArmEd/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Artillery/Genius Pro/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Artillery/Genius/BLTouch/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Artillery/Genius/V1/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Artillery/Hornet/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Artillery/Sidewinder X1/0.9 BMG - E3D V6/Configuration.h

@@ -751,7 +751,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Artillery/Sidewinder X1/V1/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Artillery/Sidewinder X2/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Azteeg/X5GT/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

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

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

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

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

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

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BIQU/B1 SE Plus/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BIQU/B1 SE/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BIQU/B1/Configuration.h

@@ -748,7 +748,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BIQU/BX/Configuration.h

@@ -761,7 +761,12 @@
   #define MPC_AUTOTUNE_MENU                           // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 50.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 50.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BIQU/Hurakan/Configuration.h

@@ -744,7 +744,12 @@
   #define MPC_AUTOTUNE_MENU                           // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BIQU/Thunder Standard/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BQ/Hephestos/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BQ/Hephestos_2/Configuration.h

@@ -754,7 +754,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/BQ/WITBOX/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/CNC/miniRambo/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/CTC/A13/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/CTC/Bizer/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/CTC/i3 2560 Rev A/no probe/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Cartesio/Configuration.h

@@ -752,7 +752,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Copymaster3D/300/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Copymaster3D/400/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Copymaster3D/500/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 Max/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 Mini/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -750,7 +750,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 Mini/BigTreeTech SKR Mini E3 3.0/Configuration.h

@@ -750,7 +750,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 Mini/CrealityV1/Configuration.h

@@ -750,7 +750,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 Mini/MEEB-3DP/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 S4/CrealityV1/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 S5/BigTreeTech SKR Mini E3 1.2 with TFT35 E3 V3.0/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 S5/BigTreeTech SKR Mini E3 v3/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 S5/CrealityV1/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 S5/CrealityV2.2 - BLTouch/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 S5/CrealityV427 - BLTouch/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 V2/Configuration.h

@@ -748,7 +748,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 V3/BigTreeTech SKR Mini E3 v3/Configuration.h

@@ -748,7 +748,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10 V3/Stock/Configuration.h

@@ -748,7 +748,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10/BigTreeTech SKR Mini E3 3.0/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10/CrealityV1/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S Pro/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S/BigTreeTech SKR 1.4 Turbo TMC2209/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S/BigTreeTech SKR 2.0 TMC2209/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S/BigTreeTech SKR Mini E3 3.0/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S/BigTreeTech SKR Pro v1.2/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S/CrealityV1 - BLTouch/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-10S/CrealityV1/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-20 Pro/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-20/RepRapWorld Minitronics20/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-20/Stock/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-30 PrintMill/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-6 SE/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/CR-8/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/Ender-2 Pro/CrealityV24S4/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/Ender-2 Pro/CrealityV423/Configuration.h

@@ -740,7 +740,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/Ender-2/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/Ender-3 Max Neo/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/Ender-3 Max/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?
 

config/examples/Creality/Ender-3 Neo/Configuration.h

@@ -741,7 +741,12 @@
   //#define MPC_AUTOTUNE_MENU                         // Add MPC auto-tuning to the "Advanced Settings" menu. (~350 bytes of flash)
 
   #define MPC_MAX 255                                 // (0..255) Current to nozzle while MPC is active.
-  #define MPC_HEATER_POWER { 40.0f }                  // (W) Heat cartridge powers.
+  #define MPC_HEATER_POWER { 40.0f }                  // (W) Nominal heat cartridge powers.
+  //#define MPC_PTC                                   // Hotend power changes with temperature (e.g., PTC heat cartridges).
+  #if ENABLED(MPC_PTC)
+    #define MPC_HEATER_ALPHA { 0.0028f }              // Temperature coefficient of resistance of the heat cartridges.
+    #define MPC_HEATER_REFTEMP { 20 }                 // (°C) Reference temperature for MPC_HEATER_POWER and MPC_HEATER_ALPHA.
+  #endif
 
   #define MPC_INCLUDE_FAN                             // Model the fan speed?