G21 ; set units to millimeters M107 M117 Z test G28 ; home G1 Z240 F300 ; move head up 240mm G28 Z0 ; home G1 Z240 F300 ; move head up 240mm G28 Z0 G1 Z240 F300 ; move head up 240mm G28 Z0 ; home G1 Z240 F300 ; move head up 240mm G28 Z0 G1 Z240 F300 ; move head up 240mm G28 Z0 ; home G1 Z240 F300 ; move head up 240mm G28 Z0 G1 Z240 F300 ; move head up 240mm G28 Z0 ; home G1 Z240 F300 ; move head up 240mm G28 Z0 G1 Z240 F300 ; move head up 240mm G28 Z0 ; home G1 Z240 F300 ; move head up 240mm G28 Z0 G1 Z100 ; move head up 100mm M84 ; disable steppers