✨ PLR_HEAT_BED_ON_REBOOT (#26691)

Marlin/Configuration_adv.h

@@ -1795,6 +1795,8 @@
   //#define POWER_LOSS_RECOVERY
   #if ENABLED(POWER_LOSS_RECOVERY)
     #define PLR_ENABLED_DEFAULT       false // Power-Loss Recovery enabled by default. (Set with 'M413 Sn' & M500)
+    //#define PLR_HEAT_BED_ON_REBOOT        // Heat up bed immediately on reboot to mitigate object detaching/warping.
+    //#define PLR_HEAT_BED_EXTRA          0 // (°C) Relative increase of bed temperature for better adhesion (limited by max temp).
     //#define PLR_BED_THRESHOLD BED_MAXTEMP // (°C) Skip user confirmation at or above this bed temperature (0 to disable)
 
     //#define POWER_LOSS_PIN             44 // Pin to detect power-loss. Set to -1 to disable default pin on boards without module, or comment to use board default.

Marlin/src/feature/powerloss.cpp

@@ -141,6 +141,14 @@ bool PrintJobRecovery::check() {
   return success;
 }
 
+/**
+ * Cancel recovery
+ */
+void PrintJobRecovery::cancel() {
+  TERN_(PLR_HEAT_BED_ON_REBOOT, set_bed_temp(false));
+  purge();
+}
+
 /**
  * Delete the recovery file and clear the recovery data
  */
@@ -366,6 +374,13 @@ void PrintJobRecovery::write() {
   if (!file.close()) DEBUG_ECHOLNPGM("Power-loss file close failed.");
 }
 
+#if ENABLED(PLR_HEAT_BED_ON_REBOOT)
+  // Set bed temperature and wait. Called from M1000 to resume bed heating.
+  void PrintJobRecovery::set_bed_temp(const bool on) {
+    PROCESS_SUBCOMMANDS_NOW(TS(F("M190S"), on ? info.target_temperature_bed + PLR_HEAT_BED_EXTRA : 0));
+  }
+#endif
+
 /**
  * Resume the saved print job
  */

Marlin/src/feature/powerloss.h

@@ -201,10 +201,13 @@ class PrintJobRecovery {
     static void close() { file.close(); }
 
     static bool check();
+    #if ENABLED(PLR_HEAT_BED_ON_REBOOT)
+      static void set_bed_temp(const bool turn_on);
+    #endif
     static void resume();
     static void purge();
 
-    static void cancel() { purge(); }
+    static void cancel();
 
     static void load();
     static void save(const bool force=ENABLED(SAVE_EACH_CMD_MODE), const float zraise=POWER_LOSS_ZRAISE, const bool raised=false);

Marlin/src/gcode/feature/powerloss/M1000.cpp

@@ -72,6 +72,9 @@ void GcodeSuite::M1000() {
     const bool force_resume = TERN0(HAS_PLR_BED_THRESHOLD, recovery.bed_temp_threshold && (thermalManager.degBed() >= recovery.bed_temp_threshold));
 
     if (!force_resume && parser.seen_test('S')) {
+
+      TERN_(PLR_HEAT_BED_ON_REBOOT, recovery.set_bed_temp(true));
+
       #if HAS_MARLINUI_MENU
         ui.goto_screen(menu_job_recovery);
       #elif ENABLED(EXTENSIBLE_UI)

buildroot/tests/rambo

@@ -14,6 +14,7 @@ opt_set MOTHERBOARD BOARD_RAMBO \
         EXTRUDERS 2 TEMP_SENSOR_0 -2 TEMP_SENSOR_1 1 TEMP_SENSOR_BED 2 \
         TEMP_SENSOR_PROBE 1 TEMP_PROBE_PIN 12 \
         TEMP_SENSOR_CHAMBER 3 TEMP_CHAMBER_PIN 3 HEATER_CHAMBER_PIN 45 \
+        PLR_HEAT_BED_EXTRA 5 PLR_BED_THRESHOLD 60 \
         GRID_MAX_POINTS_X 16 BACKLASH_MEASUREMENT_FEEDRATE 600 \
         AUTO_POWER_E_TEMP 80 FANMUX0_PIN 53 FIL_MOTION1_PIN 45
 opt_disable Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN USE_WATCHDOG
@@ -34,6 +35,7 @@ opt_enable REPRAP_DISCOUNT_SMART_CONTROLLER LCD_PROGRESS_BAR LCD_PROGRESS_BAR_TE
            FWRETRACT ARC_P_CIRCLES CNC_WORKSPACE_PLANES CNC_COORDINATE_SYSTEMS \
            PSU_CONTROL LED_POWEROFF_TIMEOUT PS_OFF_CONFIRM PS_OFF_SOUND POWER_OFF_WAIT_FOR_COOLDOWN \
            POWER_LOSS_RECOVERY POWER_LOSS_PIN POWER_LOSS_STATE POWER_LOSS_RECOVER_ZHOME POWER_LOSS_ZHOME_POS \
+           PLR_HEAT_BED_ON_REBOOT \
            SLOW_PWM_HEATERS THERMAL_PROTECTION_CHAMBER LIN_ADVANCE ADVANCE_K_EXTRA \
            HOST_ACTION_COMMANDS HOST_PROMPT_SUPPORT HOST_STATUS_NOTIFICATIONS PINS_DEBUGGING MAX7219_DEBUG M114_DETAIL
 opt_add DEBUG_POWER_LOSS_RECOVERY