B - Operations – Transporting – 23 – Q
Patent
B - Operations, Transporting
23
Q
29/8
B23Q 5/46 (2006.01) B23B 39/20 (2006.01)
Patent
CA 1046254
ABSTRACT A Z-axis drive assembly for a turret machining center incorporates a variable speed DC motor mounted on a vertically adjustable carriage and connected through a harmonic drive unit to rotate a pinion. The pinion forms part of a rack and pinion mechanism, for controlling the vertical elevation of the rack relative to the carriage.
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