;'' 'Accueil U en haut de l'axe' '' G91 G1 H2 Z4 F36000 ; lift Z relative to current position G1 H1 U285 F1800 G1 U-5 F36000 ; go back a few mm G1 U53 S1 G1 H1 U285 F300 G1 H2 Z-4 F36000 ; lower Z againG90 G90 ; absolute positioning