Importance

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Abstract

A gear-cutting machine contains one driving motor (28) with a corresponding actuator (26a, 26c . . . ) for each of various adjusting axes (B, C, X, Z . . . ). The actuators are supplied from a common dc intermediate circuit (24) and controlled by a controller (30). The dc intermediate circuit (24) is supplied by a rectifier circuit (22) from the network (20). For defined stopping of at least some of the driving motors (28) of the adjusting axes an emergency power supply is provided. The emergency power supply contains an ac motor (34) with a disk flywheel (36) mounted on the output shaft (38) thereof. In generating service of the ac motor (34) the latter provides direct-voltage energy to the ac intermediate circuit (34) via the actuator/rectifier (40). This energy suffices for at least some of the driving motors (28) to be brought into a state of rest by their corresponding actuators in controlled fashion. This avoids errors when operation of the machine is continued.

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First Claim