diff --git a/README.md b/README.md
index 32d8fa8..e255b35 100644
--- a/README.md
+++ b/README.md
@@ -9,16 +9,11 @@ QIDI PLUS4 is a 3D printer that uses Klipper as its foundation. This repository
 
 For convenience, QIDI provides version-specific packaged files. Please download the necessary compressed package file prefixed with "PLUS4." Select the appropriate branch for download, with each branch name reflecting the corresponding version.
 
-## V1.4.2 Update Content
+## V1.4.3 Update Content
 
 **Note:** After updating, the Klipper configuration file will be replaced. The previous configuration file will be backed up as `printer_{datetime}.cfg`, printer recalibration will be required.
 
-1.Update Trademark
-
-2.Fix partial language localization
-
-3.Fix the heating problem of the hot chamber at a certain height.
-    
+1.Optimize the execution logic of chamber heating.
 
 
 ## Detailed update process
diff --git a/UI/xindi_800_480.HMI b/UI/xindi_800_480.HMI
index 811a4d6..cfbf9e3 100644
Binary files a/UI/xindi_800_480.HMI and b/UI/xindi_800_480.HMI differ
diff --git a/UI/xindi_800_480.tft b/UI/xindi_800_480.tft
index e4ad373..69ab55c 100644
Binary files a/UI/xindi_800_480.tft and b/UI/xindi_800_480.tft differ
diff --git a/config/gcode_macro.cfg b/config/gcode_macro.cfg
index 0325374..220de9c 100644
--- a/config/gcode_macro.cfg
+++ b/config/gcode_macro.cfg
@@ -210,13 +210,13 @@ gcode:
     {% set chambertemp = params.CHAMBER|default(0)|int %}
     set_zoffset
     M104 S0
-    M141 S{chambertemp}
+
     M106 P2 S0
     M106 P3 S0
     M106 S255
+    G28      
+    M141 S{chambertemp}    
     M140 S{bedtemp}    
-#    M141 S{chambertemp}
-    G28    
     M106 S0
     CLEAR_NOZZLE HOTEND={hotendtemp}
     M191 S{chambertemp}    
@@ -226,7 +226,6 @@ gcode:
     G0 Z50 F600
     G0 X5 Y5  F6000
     
-
     {% if chambertemp == 0 %}
         M106 P3 S255
     {% endif %}
@@ -314,7 +313,7 @@ gcode:
         G28 X
         G1 X150 Y150 F7800
 
-        SET_KINEMATIC_POSITION Z={printer.toolhead.axis_maximum.z-5}
+        SET_KINEMATIC_POSITION Z={printer.toolhead.axis_maximum.z-30}
         QIDI_PROBE_PIN_2
         probe samples=2
         SET_KINEMATIC_POSITION Z=1.9
@@ -331,7 +330,7 @@ gcode:
     {% if params.Z is undefined %}
         SET_KINEMATIC_POSITION X=0
         SET_KINEMATIC_POSITION Y=0
-        SET_KINEMATIC_POSITION Z={printer.toolhead.axis_maximum.z-10}
+        SET_KINEMATIC_POSITION Z={printer.toolhead.axis_maximum.z-30}
         G91
         G1 Z7 F600	
         G1 X5 F2400
@@ -699,11 +698,12 @@ gcode:
 [gcode_macro M4029]
 gcode:
     M104 S140
+    M141 S0
     SAVE_VARIABLE VARIABLE=z_offset VALUE=0
     G28 
     M400
     M118 Position init complete
-
+    
     CLEAR_NOZZLE HOTEND=280
     G28
     get_zoffset
diff --git a/config/printer.cfg b/config/printer.cfg
index 09a3c32..023aeff 100644
--- a/config/printer.cfg
+++ b/config/printer.cfg
@@ -264,7 +264,7 @@ max_temp: 125
 
 [heater_generic chamber]
 heater_pin:U_1:PC8
-max_power:0.7
+max_power:0.4
 sensor_type:NTC 100K MGB18-104F39050L32
 sensor_pin:U_1:PA1
 
@@ -277,16 +277,17 @@ min_temp:-100
 max_temp:70
 
 [verify_heater chamber]
-max_error: 300
-check_gain_time:480
+max_error: 400
+check_gain_time:600
 hysteresis: 5
-heating_gain: 1
+heating_gain: 2
+position_z: 270
 
 [temperature_sensor Chamber_Thermal_Protection_Sensor]
 sensor_type:NTC 100K MGB18-104F39050L32
 sensor_pin:U_1:PC2
 min_temp:-100
-max_temp:130
+max_temp:140
 
 [verify_heater extruder]
 max_error: 120
@@ -375,6 +376,7 @@ max_power:1.0
 shutdown_speed:1.0
 cycle_time:0.01
 fan_speed: 1.0
+heater:chamber
 stepper:stepper_x,stepper_y
 
 [output_pin caselight]