✨ MIN_POWER (#27742)

Followup to #14746

Co-authored-by: mikeshub <[email protected]>

Author: thinkyhead

Marlin/Configuration.h

@@ -695,6 +695,7 @@
 #define PID_K1     0.95   // Smoothing factor within any PID loop
 
 #if ENABLED(PIDTEMP)
+  //#define MIN_POWER 0
   //#define PID_DEBUG             // Print PID debug data to the serial port. Use 'M303 D' to toggle activation.
   //#define PID_PARAMS_PER_HOTEND // Use separate PID parameters for each extruder (useful for mismatched extruders)
                                   // Set/get with G-code: M301 E[extruder number, 0-2]

Marlin/src/inc/Conditionals-1-axes.h

@@ -189,6 +189,9 @@
   #ifndef HOTEND_OVERSHOOT
     #define HOTEND_OVERSHOOT 15
   #endif
+  #ifndef MIN_POWER
+    #define MIN_POWER 0
+  #endif
 #else
   #undef MPCTEMP
   #undef PIDTEMP

Marlin/src/module/temperature.h

@@ -367,13 +367,13 @@ typedef struct { float p, i, d, c, f; } raw_pidcf_t;
 
   typedef
     #if ALL(PID_EXTRUSION_SCALING, PID_FAN_SCALING)
-      PIDCF_t<0, PID_MAX, LPQ_MAX_LEN, PID_FAN_SCALING_MIN_SPEED, PID_FAN_SCALING_LIN_FACTOR>
+      PIDCF_t<MIN_POWER, PID_MAX, LPQ_MAX_LEN, PID_FAN_SCALING_MIN_SPEED, PID_FAN_SCALING_LIN_FACTOR>
     #elif ENABLED(PID_EXTRUSION_SCALING)
-      PIDC_t<0, PID_MAX, LPQ_MAX_LEN>
+      PIDC_t<MIN_POWER, PID_MAX, LPQ_MAX_LEN>
     #elif ENABLED(PID_FAN_SCALING)
-      PIDF_t<0, PID_MAX, PID_FAN_SCALING_MIN_SPEED, PID_FAN_SCALING_LIN_FACTOR>
+      PIDF_t<MIN_POWER, PID_MAX, PID_FAN_SCALING_MIN_SPEED, PID_FAN_SCALING_LIN_FACTOR>
     #else
-      PID_t<0, PID_MAX>
+      PID_t<MIN_POWER, PID_MAX>
     #endif
   hotend_pid_t;