v1.1

- Replaced the booting music with a single bip
- Improved homing speed
- Improved auto leveling speed marginally
- Improved booting speed (side effect of booting music)
- Reduced motherboard fan noise
- Slightly increased printing speed (acceleration and jerk) when not defined in slicer

Additional details:
- Enabled quick home (X and Y homes at the same time)
- Raised homing speed to 65mm instead of 50mm and 8mm instead of 5mm for Z
- Set default fan speed to 5 instead of 255 and idle to 3 instead of 0
- Raised max acceleration to 2000 instead of 600 (be careful with that)
- Increased default acceleration to 700 instead of 600
- Increased default jerk to 6mm instead of 5mm
- Raised probing speed to 150mm instead of 133mm and 8mm instead of 4mm for Z
- Lowered Z clearance when probing to 2mm instead of 5mm
- Lowered Z homing height

source/Marlin/Configuration.h

@@ -787,7 +787,7 @@
  * Override with M201
  *                                      X, Y, Z, E0 [, E1[, E2...]]
  */
-#define DEFAULT_MAX_ACCELERATION      { 700, 600, 50, 3000 }
+#define DEFAULT_MAX_ACCELERATION      { 2000, 2000, 50, 3000 }
 
 //#define LIMITED_MAX_ACCEL_EDITING     // Limit edit via M201 or LCD to DEFAULT_MAX_ACCELERATION * 2
 #if ENABLED(LIMITED_MAX_ACCEL_EDITING)
@@ -802,7 +802,7 @@
  *   M204 R    Retract Acceleration
  *   M204 T    Travel Acceleration
  */
-#define DEFAULT_ACCELERATION          600     // X, Y, Z and E acceleration for printing moves
+#define DEFAULT_ACCELERATION          700     // X, Y, Z and E acceleration for printing moves
 #define DEFAULT_RETRACT_ACCELERATION  2000    // E acceleration for retracts
 #define DEFAULT_TRAVEL_ACCELERATION   1000    // X, Y, Z acceleration for travel (non printing) moves
 
@@ -816,8 +816,8 @@
  */
 #define CLASSIC_JERK
 #if ENABLED(CLASSIC_JERK)
-  #define DEFAULT_XJERK  5
-  #define DEFAULT_YJERK  5
+  #define DEFAULT_XJERK  6
+  #define DEFAULT_YJERK  6
   #define DEFAULT_ZJERK  0.3
 
   //#define TRAVEL_EXTRA_XYJERK 0.0     // Additional jerk allowance for all travel moves
@@ -1030,10 +1030,10 @@
 
 
 // X and Y axis travel speed (mm/min) between probes
-#define XY_PROBE_SPEED (133*60)
+#define XY_PROBE_SPEED (150*60)
 
 // Feedrate (mm/min) for the first approach when double-probing (MULTIPLE_PROBING == 2)
-#define Z_PROBE_SPEED_FAST (4*60)
+#define Z_PROBE_SPEED_FAST (8*60)
 
 // Feedrate (mm/min) for the "accurate" probe of each point
 #define Z_PROBE_SPEED_SLOW (Z_PROBE_SPEED_FAST / 2)
@@ -1092,8 +1092,8 @@
  *     But: `M851 Z+1` with a CLEARANCE of 2  =>  2mm from bed to nozzle.
  */
 #define Z_CLEARANCE_DEPLOY_PROBE   10 // Z Clearance for Deploy/Stow
-#define Z_CLEARANCE_BETWEEN_PROBES  5 // Z Clearance between probe points
-#define Z_CLEARANCE_MULTI_PROBE     5 // Z Clearance between multiple probes
+#define Z_CLEARANCE_BETWEEN_PROBES  2 // Z Clearance between probe points
+#define Z_CLEARANCE_MULTI_PROBE     2 // Z Clearance between multiple probes
 //#define Z_AFTER_PROBING           5 // Z position after probing is done
 
 #define Z_PROBE_LOW_POINT          -10 // Farthest distance below the trigger-point to go before stopping
@@ -1179,7 +1179,7 @@
 //#define HOME_AFTER_DEACTIVATE   // Require rehoming after steppers are deactivated. Also enable NO_MOTION_BEFORE_HOMING for extra safety.
 //#define UNKNOWN_Z_NO_RAISE      // Don't raise Z (lower the bed) if Z is "unknown." For beds that fall when Z is powered off.
 
-#define Z_HOMING_HEIGHT  4      // (mm) Minimal Z height before homing (G28) for Z clearance above the bed, clamps, ...
+#define Z_HOMING_HEIGHT  3      // (mm) Minimal Z height before homing (G28) for Z clearance above the bed, clamps, ...
                                   // Be sure to have this much clearance over your Z_MAX_POS to prevent grinding.
 
 //#define Z_AFTER_HOMING  10      // (mm) Height to move to after homing Z
@@ -1544,7 +1544,7 @@
 #endif
 
 // Homing speeds (mm/min)
-#define HOMING_FEEDRATE_MM_M { (50*60), (50*60), (5*60) }
+#define HOMING_FEEDRATE_MM_M { (65*60), (65*60), (8*60) }
 
 // Validate that endstops are triggered on homing moves
 #define VALIDATE_HOMING_ENDSTOPS

source/Marlin/Configuration_adv.h

@@ -401,8 +401,8 @@
   //#define CONTROLLER_FAN_USE_Z_ONLY    // With this option only the Z axis is considered
   //#define CONTROLLER_FAN_IGNORE_Z      // Ignore Z stepper. Useful when stepper timeout is disabled.
   #define CONTROLLERFAN_SPEED_MIN      0 // (0-255) Minimum speed. (If set below this value the fan is turned off.)
-  #define CONTROLLERFAN_SPEED_ACTIVE 255 // (0-255) Active speed, used when any motor is enabled
-  #define CONTROLLERFAN_SPEED_IDLE     0 // (0-255) Idle speed, used when motors are disabled
+  #define CONTROLLERFAN_SPEED_ACTIVE   5 // (0-255) Active speed, used when any motor is enabled
+  #define CONTROLLERFAN_SPEED_IDLE     3 // (0-255) Idle speed, used when motors are disabled
   #define CONTROLLERFAN_IDLE_TIME     60 // (seconds) Extra time to keep the fan running after disabling motors
   #define CONTROLLER_FAN_EDITABLE      // Enable M710 configurable settings
   #if ENABLED(CONTROLLER_FAN_EDITABLE)
@@ -666,7 +666,7 @@
 
 //#define HOMING_BACKOFF_POST_MM { 2, 2, 2 }  // (mm) Backoff from endstops after homing
 
-//#define QUICK_HOME                          // If G28 contains XY do a diagonal move first
+#define QUICK_HOME                          // If G28 contains XY do a diagonal move first
 //#define HOME_Y_BEFORE_X                     // If G28 contains XY home Y before X
 //#define HOME_Z_FIRST                        // Home Z first. Requires a Z-MIN endstop (not a probe).
 //#define CODEPENDENT_XY_HOMING               // If X/Y can't home without homing Y/X first

source/Marlin/src/lcd/extui/lib/anycubic_dgus/dgus_Tunes.h

@@ -196,10 +196,9 @@ namespace Anycubic {
   };
 
   const uint16_t Anycubic_PowerOn[] = {
-    1000,
-    n_F7,l_T8, n_P,l_T8, n_C7,l_T8, n_P,l_T8, n_D7,l_T8, n_P,l_T8,
-    n_E7,l_T8, n_P,l_T8, n_D7,l_T4, n_P,l_T4, n_G7,l_T4, n_P,l_T4,
-    n_A7,l_T2, n_P,l_T1,
+    500,
+    n_P, l_T1, n_P, l_T1, n_P, l_T1, n_P, l_T1, n_P, l_T1, n_P, l_T8,
+		n_F5, l_T8,
     n_END
   };
 

source/Marlin/src/lcd/extui/lib/anycubic_dgus/dgus_tft.h

@@ -34,7 +34,7 @@
 #include "../../ui_api.h"
 
 #define DEVICE_NAME             "Anycubic Kobra"
-#define FIRMWARE_VER            "Kobra V2.8.2"
+#define FIRMWARE_VER            "jojos38 v1.1 Kobra V2.8.2"
 #define BUILD_VOLUME            "220*220*250 (mm)"
 #define TECH_SUPPORT            "https://www.anycubic.com"