A gantry milling machine (10) is provided with a pair of uprights (14, 16) and for each upright (14, 16), it is provided with a worm screw (32) and a screw (34), an upper electric motor (40), engaged with the screw (34), directly or indirectly, at the upper end (36), and a lower electric motor (42), engaged with the screw (34), directly or indirectly, at the lower end (38).
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