Brother Kogyo Kabushiki-Kaisha

Mitsutaka Kazino

Kikuo Watanabe

Hisashi Yamazaki

A movement controlling device for the movement of a movable member such as a table in a machine tool which is capable of doing a rapid feeding, a normal feeding for cutting, and a rapid returning. The movable member is driven by a fluid pressure cylinder and engaged, at a predetermined position in the forward movement stroke, with a rack which is linked to a motor by way of the gearing mechanism including a worm and a worm-wheel. The motor is so driven, due to a signal from a sensor for sensing the engagement between the rack and the movable member, as to shift the rack at the speed of cutting feed in the same direction as that of the forward movement of the movable member, and the movable member which is driven by the fluid pressure cylinder is also shifted in response to the shift of the rack. The movable member is, activated by the action of the fluid pressure cylinder due to a signal from a means for sensing the end position of the forward movement of the movable member, returned to the original position at a rapid speed. The rack is to be returned to a predetermined position, independently from the movement of the movable member, at a higher speed than the cutting feed speed due to the reverse rotation of the motor.

Growing community of inventors

Nagoya, Japan

Mitsutaka Kazino