i3 mega beginning end new

; START GCODE START

G90 ; absolute positioning
G92 E0 ; Zero extruder position
M83 ; extruder relative mode
M107 ; fan off

M204 P[machine_max_acceleration_extruding] R[machine_max_acceleration_retracting] T[machine_max_acceleration_travel]

M104 S[nozzle_temperature_initial_layer] ; set nozzle temp
M140 S[bed_temperature_initial_layer_single] ; set bed temp


; Beep + small delay before start
M300 P2500 S500 ; long beep before start
G4 S3 ; wait 3 s

G28 X0 Y0 Z0 ; home all axes
M400 ; wait to stop moving
G1 Z0.5 ; Move up to safe height
M190 S[bed_temperature_initial_layer_single] ; wait for bed temp
M109 S[nozzle_temperature_initial_layer] ; wait for nozzle temp
; Beep + small delay before start
M300 P2500 S500 ; long beep before start
G4 S3 ; wait 3 s
G1 E25 F750 ; default retracted amount from previous print
G1 E10 F750 ; load extra while stationary - main prime
G1 X50 Y0 E10.0 F900 ; prime line
M400 ; wait to stop moving
G1 E-3 ; small retract before print starts
G92 E0 ; Reset extruder position

; START GCODE END


; END GCODE START

M106 ; fan full speed
G92 E0 ; reset extruder position
G91 ; relative positioning
M83 ; extruder relative mode
G1 F{travel_speed*60} ; set travel speed from slicer
M204 P[machine_max_acceleration_extruding] R[machine_max_acceleration_retracting] T[machine_max_acceleration_travel]
M104 S0 ; nozzle heater off
M140 S0 ; bed heater off

G1 Y5 Z0.2 E-2  ; Local wipe near print
G90 ; back to absolute positioning
M83 ; ensure extruder is relative
G1 Y{print_bed_max[1]} E-3 F6000 ; move to rear of bed (max Y)
M400 ; wait for motion complete

G1 {if max_layer_z+10 < printable_height} Z{z_offset+min(max_layer_z+10, printable_height)}{endif} E-25.0 F{travel_speed*60} ; Lift Z only if it stays within printable height
M400 ; wait for Z-lift complete


M18 ; Disable motors
G4 S10 ; cool down for 10 seconds
M107 ; fan off
M300 P300 S4000 ; Beep to indicate print finished

; END GCODE END