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
; warning beep to clean
M300 S7000 P100
M300 S0 P100
M300 S7000 P100
M300 S0 P100
M300 S7000 P400
M117 Clean
;end beeping
G1 Z20.0 F9000 ;move the platform down 20mm
G92 E0 ;zero the extruded length
G1 F200 E15 ;extrude 3mm of feed stock
;make the cleaning trace
G1 Y0 Z2 F1000
G1 X40 Y0 Z0.15 F4000 E19
G1 Z0.4 F4000
;end making trace
G92 E0 ;zero the extruded length again
G1 F9000
;Put printing message on LCD screen
M300 S3000 P100
M117 Printing...