étant donné que cette question reviens régulièrement,  voici les Gcodes de démarrage et de fin , il y a mieux, il y a pire , mais ils font  très bien leur boulot sur l'anycubic 

voici un gcode de démarrage 

;Sliced at: {day} {date} {time}
;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}
;Print time: {print_time}
;Filament used: {filament_amount}m {filament_weight}g
;Filament cost: {filament_cost}
;M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line
;M109 S{print_temperature} ;Uncomment to add your own temperature line
G21        ;metric values
G90        ;absolute positioning
M82        ;set extruder to absolute mode
M107       ;start with the fan off
G28 X0 Y0  ;move X/Y to min endstops
G28 Z0     ;move Z to min endstops
G1 Z15.0 F{travel_speed} ;move the platform down 15mm
G92 E0                  ;zero the extruded length
G1 F200 E10             ;extrude 10mm of feed stock
G92 E0                  ;zero the extruded length again
G1 F{travel_speed};Put printing message on LCD screen
M117 Printing...
G5 ;

Gcode de fin

;End GCode
M104 S0                     ;extruder heater off
M140 S0                     ;heated bed heater off (if you have it)
G91                                    ;relative positioning
G1 E-1 F300                            ;retract the filament a bit before lifting the nozzle to release some of the pressure
G1 Z+1.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more
G28 X0 Y0                             ;move X/Y to min endstops so the head is out of the way
G0 Y180 F3500       ; Ramene le plateau en avant afin de decoller la piece tranquillouuuuuuuu
M84                         ;steppers off
G90                         ;absolute positioning
M107 ;
;{profile_string}

si un modo peu passé par la est épinglé ce poste ça serais cool