Add FILAMENT_UNLOAD_PURGE_FEEDRATE (MarlinFirmware#16372)

Marlin/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

Marlin/src/feature/pause.cpp

@@ -352,7 +352,7 @@ bool unload_filament(const float &unload_length, const bool show_lcd/*=false*/,
 
   // Quickly purge
   do_pause_e_move((FILAMENT_UNLOAD_PURGE_RETRACT + FILAMENT_UNLOAD_PURGE_LENGTH) * mix_multiplier,
-                  planner.settings.max_feedrate_mm_s[E_AXIS] * mix_multiplier);
+                  (FILAMENT_UNLOAD_PURGE_FEEDRATE) * mix_multiplier);
 
   // Unload filament
   #if FILAMENT_CHANGE_UNLOAD_ACCEL > 0

config/default/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

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

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

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

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

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

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

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

@@ -1757,6 +1757,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Alfawise/U20/Configuration_adv.h

@@ -1756,6 +1756,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/AliExpress/UM2pExt/Configuration_adv.h

@@ -1757,6 +1757,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Anet/A2/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Anet/A2plus/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Anet/A6/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Anet/A8/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Anet/A8plus/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Anet/E16/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/AnyCubic/i3/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/ArmEd/Configuration_adv.h

@@ -1759,6 +1759,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

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

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

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

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/BQ/Hephestos/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -1763,6 +1763,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/BQ/WITBOX/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/BigTreeTech/SKR Mini E3 1.0/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/BigTreeTech/SKR Mini E3 1.2/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Cartesio/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.

config/examples/Creality/CR-10/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT          120  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS          6  // Number of alert beeps to play when a response is needed.

config/examples/Creality/CR-10S/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT        4  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         0  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS          6  // Number of alert beeps to play when a response is needed.

config/examples/Creality/CR-10_5S/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       10  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         0  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS          6  // Number of alert beeps to play when a response is needed.

config/examples/Creality/CR-10mini/Configuration_adv.h

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT          120  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS          6  // Number of alert beeps to play when a response is needed.

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

@@ -1755,6 +1755,7 @@
   #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
   #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.