(X-Axis Accel Test - RELATIVE POSITIONING)
(WARNING: Ensure you have 200mm of travel to the RIGHT of your starting point)

G21 (Set units to millimeters)
G91 (Set relative positioning mode)

(Long moves: Test acceleration up to full max speed)
G0 X200 (Move 200mm right)
G0 X-200 (Move 200mm left)
G0 X200
G0 X-200

(Medium moves)
G0 X100
G0 X-100
G0 X100
G0 X-100

(Short, aggressive back-and-forth moves to stress rotational inertia)
G0 X20
G0 X-10
G0 X20
G0 X-20
G0 X30
G0 X-30
G0 X40
G0 X-30
G0 X40
G0 X-40
G0 X50

(Return to Start Position)
(The net travel of the short moves above is +70mm)
(We must move -70mm to get exactly back to the start point)
G0 X-70

G90 (Set back to absolute positioning for normal operation)
(End of test)
M30