Prevent oozing after filament load

Retract 10mm of filament after loading

Firmware/Marlin_main.cpp

@@ -3544,6 +3544,9 @@ void gcode_M701(float fastLoadLength, uint8_t mmuSlotIndex){
         if (!farm_mode && (eFilamentAction != FilamentAction::None)) {
             lcd_load_filament_color_check();
         }
+
+        retract_for_ooze_prevention(); // Retract a little of filament to prevent oozing
+
         lcd_update_enable(true);
         lcd_update(2);
         lcd_setstatuspgm(MSG_WELCOME);

Firmware/ultralcd.cpp

@@ -5603,6 +5603,15 @@ static void lcd_sd_updir()
   menu_data_reset(); //Forces reloading of cached variables.
 }
 
+/// @brief retract a little of filament to prevent oozing
+void retract_for_ooze_prevention() {
+        current_position[E_AXIS] += FILAMENTCHANGE_ROOZEFEED;
+        plan_buffer_line_curposXYZE(FILAMENTCHANGE_RFEED);
+        current_position[E_AXIS] += FILAMENTCHANGE_EOOZEFEED;
+        plan_buffer_line_curposXYZE(FILAMENTCHANGE_EFEED_FIRST);
+        st_synchronize();
+}
+
 // continue stopping the print from the main loop after lcd_print_stop() is called
 void lcd_print_stop_finish()
 {
@@ -5617,8 +5626,10 @@ void lcd_print_stop_finish()
         current_position[Y_AXIS] = Y_CANCEL_POS;
         plan_buffer_line_curposXYZE(manual_feedrate[0] / 60);
     }
-    st_synchronize();
 
+    // Retract a little of filament to prevent oozing
+    retract_for_ooze_prevention();
+    
     // did we come here from a thermal error?
     if(get_temp_error()) {
         // time to stop the error beep

Firmware/ultralcd.h

@@ -253,5 +253,6 @@ extern void lcd_pinda_temp_compensation_toggle();
 #endif //PINDA_TEMP_COMP
 
 extern void lcd_heat_bed_on_load_toggle();
+extern void retract_for_ooze_prevention();
 
 #endif //ULTRALCD_H

Firmware/variants/MK25-RAMBo10a.h

@@ -232,6 +232,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK25-RAMBo13a.h

@@ -233,6 +233,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK25S-RAMBo10a.h

@@ -232,6 +232,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK25S-RAMBo13a.h

@@ -233,6 +233,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK3-E3DREVO.h

@@ -366,6 +366,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK3-E3DREVO_HF_60W.h

@@ -367,6 +367,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK3.h

@@ -369,6 +369,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK3S-E3DREVO.h

@@ -370,6 +370,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK3S-E3DREVO_HF_60W.h

@@ -371,6 +371,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/MK3S.h

@@ -373,6 +373,8 @@
 #define FILAMENTCHANGE_RFEED 7000 / 60
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/obsolete/1_75mm_MK2-RAMBo10a-E3Dv6full.h

@@ -161,6 +161,8 @@ CHANGE FILAMENT SETTINGS
 #define FILAMENTCHANGE_RFEED 400
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif
 

Firmware/variants/obsolete/1_75mm_MK2-RAMBo13a-E3Dv6full.h

@@ -160,6 +160,8 @@ CHANGE FILAMENT SETTINGS
 #define FILAMENTCHANGE_RFEED 400
 #define FILAMENTCHANGE_EXFEED 2
 #define FILAMENTCHANGE_ZFEED 15
+#define FILAMENTCHANGE_ROOZEFEED -10 //E retract distance in mm for ooze prevention
+#define FILAMENTCHANGE_EOOZEFEED 4 //E extrude distance in mm for ooze prevention
 
 #endif