🔧 Wrap POWER_LOSS_RETRACT_LEN (MarlinFirmware#26695)

Author: vovodroid

Marlin/Configuration_adv.h

@@ -459,7 +459,7 @@
       #define PID_FAN_SCALING_LIN_FACTOR (PID_FAN_SCALING_AT_FULL_SPEED-DEFAULT_Kf)/255.0
 
     #else
-      #define PID_FAN_SCALING_LIN_FACTOR (0)             // Power loss due to cooling = Kf * (fan_speed)
+      #define PID_FAN_SCALING_LIN_FACTOR (0)             // Power-loss due to cooling = Kf * (fan_speed)
       #define DEFAULT_Kf 10                              // A constant value added to the PID-tuner
       #define PID_FAN_SCALING_MIN_SPEED 10               // Minimum fan speed at which to enable PID_FAN_SCALING
     #endif
@@ -1540,6 +1540,7 @@
    * Axis moves <= 1/2 the axis length and Extruder moves <= EXTRUDE_MAXLENGTH
    * will be shown in the move submenus.
    */
+
   #define MANUAL_MOVE_DISTANCE_MM                    10, 1.0, 0.1  // (mm)
   //#define MANUAL_MOVE_DISTANCE_MM         100, 50, 10, 1.0, 0.1  // (mm)
   //#define MANUAL_MOVE_DISTANCE_MM    500, 100, 50, 10, 1.0, 0.1  // (mm)
@@ -1744,21 +1745,26 @@
    */
   //#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_ENABLED_DEFAULT       false // Power-Loss Recovery enabled by default. (Set with 'M413 Sn' & M500)
     //#define PLR_BED_THRESHOLD BED_MAXTEMP // (°C) Skip user confirmation at or above this bed temperature (0 to disable)
-    //#define BACKUP_POWER_SUPPLY           // Backup power / UPS to move the steppers on power loss
-    //#define POWER_LOSS_ZRAISE           2 // (mm) Z axis raise on resume (on power loss with UPS)
-    //#define POWER_LOSS_PIN             44 // Pin to detect power loss. Set to -1 to disable default pin on boards without module.
-    //#define POWER_LOSS_STATE         HIGH // State of pin indicating power loss
+
+    //#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.
+    //#define POWER_LOSS_STATE         HIGH // State of pin indicating power-loss
     //#define POWER_LOSS_PULLUP             // Set pullup / pulldown as appropriate for your sensor
     //#define POWER_LOSS_PULLDOWN
-    //#define POWER_LOSS_PURGE_LEN       20 // (mm) Length of filament to purge on resume
-    //#define POWER_LOSS_RETRACT_LEN     10 // (mm) Length of filament to retract on fail. Requires backup power.
+
+    //#define POWER_LOSS_ZRAISE        2    // (mm) Z axis raise on resume (on power-loss with UPS)
+    //#define POWER_LOSS_PURGE_LEN    20    // (mm) Length of filament to purge on resume
 
     // Without a POWER_LOSS_PIN the following option helps reduce wear on the SD card,
     // especially with "vase mode" printing. Set too high and vases cannot be continued.
     #define POWER_LOSS_MIN_Z_CHANGE    0.05 // (mm) Minimum Z change before saving power-loss data
 
+    //#define BACKUP_POWER_SUPPLY           // Backup power / UPS to move the steppers on power-loss
+    #if ENABLED(BACKUP_POWER_SUPPLY)
+      //#define POWER_LOSS_RETRACT_LEN   10 // (mm) Length of filament to retract on fail
+    #endif
+
     // Enable if Z homing is needed for proper recovery. 99.9% of the time this should be disabled!
     //#define POWER_LOSS_RECOVER_ZHOME
     #if ENABLED(POWER_LOSS_RECOVER_ZHOME)

Marlin/src/feature/powerloss.cpp

@@ -75,16 +75,15 @@ uint32_t PrintJobRecovery::cmd_sdpos, // = 0
 
 PrintJobRecovery recovery;
 
-#ifndef POWER_LOSS_PURGE_LEN
-  #define POWER_LOSS_PURGE_LEN 0
-#endif
-
 #if DISABLED(BACKUP_POWER_SUPPLY)
   #undef POWER_LOSS_RETRACT_LEN   // No retract at outage without backup power
 #endif
 #ifndef POWER_LOSS_RETRACT_LEN
   #define POWER_LOSS_RETRACT_LEN 0
 #endif
+#ifndef POWER_LOSS_PURGE_LEN
+  #define POWER_LOSS_PURGE_LEN 0
+#endif
 
 // Allow power-loss recovery to be aborted
 #define PLR_CAN_ABORT

Marlin/src/feature/powerloss.h

@@ -42,8 +42,11 @@
   #define POWER_LOSS_STATE HIGH
 #endif
 
+#if DISABLED(BACKUP_POWER_SUPPLY)
+  #undef POWER_LOSS_ZRAISE    // No Z raise at outage without backup power
+#endif
 #ifndef POWER_LOSS_ZRAISE
-  #define POWER_LOSS_ZRAISE 2
+  #define POWER_LOSS_ZRAISE 2 // Default Z-raise on outage or resume
 #endif
 
 //#define DEBUG_POWER_LOSS_RECOVERY